1.8l 4-cyl - Vtec - Gs-R & Type R Acura Integra III

ENGINE IDENTIFICATION

Note. For repair procedures not covered in this article, see ENGINE OVERHAUL PROCEDURES article in GENERAL INFORMATION.

Engine identification code is stamped on right rear of cylinder block as viewed from flywheel, below cylinder head mating surface. First 5 numbers of code indicate engine type. Last 7 numbers of code indicate engine serial number.

ENGINE IDENTIFICATION CODE

VALVE CLEARANCE

Note. Valves should be adjusted when cylinder head temperature is less than 100°F (38°C). Adjustment procedures are the same for both intake and exhaust valves.

1. Remove valve cover. Rotate crankshaft counterclockwise so No. 1 piston is at TDC of compression stroke. Ensure UP marks on camshaft sprockets are at top and TDC grooves on pulleys are aligned with TDC groove on back cover. (Scheme 19)
2. Adjust valve clearance on both valves for No. 1 cylinder. Loosen lock nuts. Rotate adjuster screw until clearance is as specified. Tighten lock nut to 15 ft. lbs. (20 N.m). Recheck adjustment. See «VALVE CLEARANCE SPECIFICATIONS»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r).
3. Rotate crankshaft 180 degrees counterclockwise (camshaft sprockets turn 90 degrees) until No. 3 piston is at TDC of compression stroke. UP marks should point to exhaust side. Adjust valve clearance on both valves for No. 3 cylinder.
4. Rotate crankshaft 180 degrees counterclockwise until No. 4 piston is at TDC of compression stroke. Ensure UP marks are pointing down. Adjust valve clearance on both valves for No. 4 cylinder.
5. Rotate crankshaft 180 degrees counterclockwise until No. 2 piston is at TDC of compression stroke. Ensure UP marks are pointing to intake side. Adjust valve clearances on both valves for No. 2 cylinder. Install new valve cover gasket.

VALVE CLEARANCE SPECIFICATIONS

Scheme 19

TIMING BELT TENSION

Remove valve cover. Rotate crankshaft counterclockwise until No. 1 piston is at TDC. Rotate crankshaft 5-6 revolutions counterclockwise to create tension on timing belt. Rotate crankshaft counterclockwise until No. 1 piston is at TDC. Loosen tension adjuster bolt one half turn only (180 degrees). (Scheme 20) Rotate crankshaft counterclockwise enough to create tension on timing belt. Tighten tension adjuster bolt to specification. See TORQUE SPECIFICATIONS. Install valve cover with NEW gaskets.

Scheme 20

REMOVAL & INSTALLATION

Note. For reassembly reference, label all electrical connectors, vacuum hoses, and fuel lines before removal. Also place mating marks on engine hood and other major assemblies before removal.

Note. On some vehicles, radio/cassette or radio/CD player is equipped with anti-theft protection. Whenever battery is disconnected, radio will go into anti-theft mode. When battery is reconnected, radio will display CODE and will be inoperative until proper code number is entered. Obtain code number before disconnecting battery.

FUEL PRESSURE RELEASE

Disconnect negative battery cable. Remove fuel tank filler cap. Place a shop towel on top of fuel filter. Release fuel injection system pressure by slowly loosening fuel filter banjo bolt. (Scheme 21)

Scheme 21

BLEEDING COOLING SYSTEM

See BLEEDING COOLING SYSTEM in ENGINE COOLING, SPECIFICATIONS & ELECTRIC COOLING FANS article.

ENGINE

Removal

1. Remove hood. Remove strut brace. Disconnect battery cables. Disconnect battery cables from underhood fuse/relay box and ABS fuse/relay box. Remove intake air duct, air cleaner housing assembly and bracket. Remove EVAP control canister hose.
2. Disconnect engine wire harness connectors on right side of engine compartment. Release fuel pressure. See «FUEL PRESSURE RELEASE»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r__fuel-pressure-release). Remove fuel feed hose and fuel return hose. Remove brake booster vacuum hose. Remove throttle cable by loosening lock nut and removing cable end from accelerator linkage.
3. Disconnect engine wire harness connectors on left side of engine compartment. Remove harness clamps. Remove cruise control actuator. Remove engine ground cable. Remove power steering pump adjusting and mounting bolts. Remove power steering pump belt and pump. Do not disconnect power steering pump hoses.
4. Loosen idler pulley bolt and adjusting bolt. Remove air conditioning compressor belt. For manual transmission models, remove clutch slave cylinder and pipe/hose assembly. Do not disconnect pipe/hose assembly. On all models, remove transmission ground cable and hose clamp.
5. Remove radiator cap. Raise and support vehicle. Remove front wheels and splash shield. Drain engine and transmission oil. Reinstall engine and transmission drain plugs using NEW washers. Drain cooling system. Remove upper and lower radiator and heater hoses. For automatic transmission models, remove ATF cooler hoses.
6. On all models, remove radiator assembly. Remove A/C compressor with hoses attached. Disconnect oxygen sensor and remove exhaust pipe "A". (Scheme 22) For manual transmission vehicles, remove shift rod and extension rod. For automatic transmission vehicles, remove shift cable. On all models, remove damper fork and disconnect suspension lower arm ball joints. Remove axle shaft.
7. Attach chain hoist to engine. Raise hoist to take all slack from chain. Remove left and right front engine mounts and brackets. Remove rear and side engine mount bracket. Remove transmission mount. Ensure engine is free of all hoses and electrical wiring. Slowly raise engine, once again ensure all hoses and electrical wiring has been disconnected. Raise engine and remove from vehicle.

Installation

1. To install, reverse removal procedure. To prevent excessive engine vibration and premature engine mount wear, tighten engine/transaxle mounts in sequence specified. (Scheme 23)
2. Install transmission mount and tighten bolts/nuts on transmission side. Leave mount bolt loose. Install engine side mount and tighten bolts/nuts on engine side. Leave mount bolt loose. Tighten mount bolt on transmission mount. Tighten mount bolt on side engine mount and install rear mount bracket. Tighten rear mount bracket bolts. Install and tighten right and left front mounting brackets and bolts.
3. When installing axle shafts, use NEW spring clips. Insert axle shafts until spring clips click into groove of differential side gear. Ensure harness connectors and hoses are connected properly. Ensure control cables are not bent or pinched and are adjusted properly. Tighten remaining bolts/nuts to specification. See «TORQUE SPECIFICATIONS»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r__torque-specifications). On manual transmission models, adjust clutch pedal free play. Verify transaxle shifts smoothly.
4. On all models, adjust drive belt tension. Fill or top off all fluids. Fill and bleed air from cooling system. See «BLEEDING COOLING SYSTEM»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r__bleeding-cooling-system). Start engine and check for leaks.

Scheme 22

Scheme 23

1. Disconnect negative battery cable. Release fuel system pressure. See «FUEL PRESSURE RELEASE»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r__fuel-pressure-release) . Carefully remove radiator cap to release cooling system pressure. Drain cooling system. Remove upper and lower radiator hoses. Remove air intake duct and air cleaner assembly.
2. Disconnect fuel inlet and return hoses. Mark and disconnect vacuum hoses and wiring harness connectors. Remove fuel evaporation canister hose from throttle body.
3. Remove brake booster and PCV hoses from intake manifold. Disconnect throttle cable. Remove coolant by-pass hoses. Remove intake manifold nuts, intake manifold, and gasket.

Clean gasket surfaces. Install intake manifold, using NEW intake manifold gasket. Tighten intake manifold nuts to specification, using a crisscross pattern in 2-3 stages, beginning with inner nuts. See TORQUE SPECIFICATIONS . To complete installation, reverse removal procedure. Refill and bleed air from cooling system. See BLEEDING COOLING SYSTEM .

Disconnect negative battery cable. Remove oil dipstick. Remove exhaust manifold heat shield. Disconnect exhaust pipe from exhaust manifold. Remove exhaust manifold bracket. Disconnect oxygen sensor wiring. Remove exhaust manifold bolts. Remove exhaust manifold and gasket.

To install, reverse removal procedure. Tighten bolts to specification. See TORQUE SPECIFICATIONS .

1. Allow engine to cool to less than 100°F (38°C). Disconnect negative battery cable. Drain cooling system. Release fuel system pressure. See «FUEL PRESSURE RELEASE»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r__fuel-pressure-release). Tag and disconnect all hoses. Remove strut brace. Rotate crankshaft pulley until No. 1 piston is at TDC of compression stroke and timing marks are aligned. (Scheme 24)
2. Remove intake air duct. Remove EVAP control canister hose. Remove water by-pass and PCV hoses. Remove brake booster vacuum and fuel return hoses. Remove throttle cable from throttle body.
3. Remove/disconnect engine wiring harness connectors and harness clamps from cylinder head and intake manifold. Remove spark plug wires and distributor from cylinder head. Remove upper radiator hose and heater hose. Disconnect engine ground cable at valve cover.
4. Remove power steering pump with hoses attached, and set it aside. Remove heat shield. Remove A/C compressor belt and alternator belt. Remove cruise control actuator. Remove side engine mount. Remove valve cover. Remove timing belt. See «TIMING BELT»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r).
5. Remove camshaft pulleys and back cover. Remove exhaust manifold and intake manifold. Loosen valve adjuster screws. Remove camshaft holder plates, camshaft holders and camshafts. Loosen cylinder head bolts 1/3 turn at a time until all are loose, in reverse order of tightening sequence. (Scheme 25) Remove cylinder head.

Inspection

1. Ensure all mating surfaces are clean. Measure cylinder block surface warpage. Cylinder block warpage must not exceed 0.003" (0.08 mm).
2. Measure cylinder head warpage. Resurfacing is not required if warpage is less than 0.002" (0.05 mm). Resurface cylinder head if warpage is 0.002-0.008" (0.05-0.20 mm) or greater. Maximum resurface limit is 0.008" (0.20 mm).
3. Ensure cylinder head dowel pins, oil control jet, and "O" ring are installed in block. (Scheme 26)

1. Install new cylinder head gasket. Ensure No. 1 piston is at TDC of compression stroke. Apply a light coat of engine oil to cylinder head bolt threads and bottom of bolt head. Install and tighten cylinder head bolts to specification in 2 stages and in sequence. (Scheme 25)
2. Install intake manifold onto cylinder head. Tighten nuts to specification in a crisscross pattern, beginning with inner nuts. Install exhaust manifold with NEW nuts. Tighten nuts to specification in a crisscross pattern, beginning with inner nuts. See «TORQUE SPECIFICATIONS»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r__torque-specifications).
3. Install camshafts. See CAMSHAFTS. Install camshaft pulleys. Install timing belt. See TIMING BELT. To complete installation, reverse removal procedure. Tighten remaining bolts/nuts to specification. See «TORQUE SPECIFICATIONS»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r__torque-specifications).

Scheme 24

Scheme 25

Scheme 26

Remove timing belt. See TIMING BELT . Remove crankshaft timing belt pulley. Remove front crankshaft oil seal.

Lubricate crankshaft and seal lip with grease. Install seal using Seal Driver (07LAD-PR4010A) until seal driver bottoms against oil pump. To complete installation, reverse removal procedure.

1. Raise and support vehicle. Remove left front wheel and wheelwell splash shield. Remove power steering pump belt, A/C compressor belt and generator belt. Remove cruise control actuator. Remove right engine mount.
2. Remove valve cover. Remove crankshaft pulley bolt and pulley. Remove middle and lower timing belt cover. (Scheme 27) Loosen timing adjuster bolt 180 degrees. Push on timing belt tensioner to release tension from belt, then retighten adjuster bolt. Disengage timing belt from camshaft pulleys. (Scheme 27)

1. Ensure No. 1 piston is at TDC of compression stroke. Install timing belt onto sprockets. DO NOT bend or twist belt excessively. Ensure arrow on used belt points in original direction. Adjust timing belt tension. See «TIMING BELT TENSION»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r__timing-belt-tension) under ADJUSTMENTS.
2. To complete installation, reverse removal procedure. Lubricate threads only of crankshaft pulley bolt, leaving underside of bolt head dry. Tighten crankshaft pulley bolt to 147 ft. lbs. (200 N.m), loosen, then retighten to 133 ft. lbs. (180 N.m). Tighten remaining bolts/nuts to specification. See «TORQUE SPECIFICATIONS»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r__torque-specifications) .

Scheme 27

1. Disconnect negative battery cable. Remove valve cover and middle timing belt cover. (Scheme 27) Rotate crankshaft counterclockwise to bring No. 1 piston to TDC of its compression stroke, with UP mark on sprockets at top. (Scheme 24)
2. Remove distributor. Loosen timing belt adjuster bolt 180 degrees. Push tensioner to release tension from belt. Retighten adjuster bolt. Disengage timing belt from camshaft pulleys. Remove camshaft pulleys. Mark camshaft retainers and rocker arms for installation reference. Loosen valve adjuster screws and camshaft retainer bolts. Remove camshaft and rocker arms.

1. Lubricate camshaft journals and bearings. Install rocker arms (if removed) into original positions. Install camshafts into cylinder head. Keyways must face upward. Install camshaft oil seals. Apply sealant to mating surfaces of camshaft retainers at each end. Arrows on camshaft retainers must point toward timing belt. Ensure that rockers do not bind on valves.
2. Temporarily tighten camshaft retainer bolts. Tighten camshaft bolts to specification in sequence. (Scheme 28) See «TORQUE SPECIFICATIONS»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r__torque-specifications). To complete installation, reverse removal procedure. Tighten remaining bolts/nuts to specification. See «TORQUE SPECIFICATIONS»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r__torque-specifications). Adjust timing belt tension and valve clearance. See «TIMING BELT TENSION»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r__timing-belt-tension) and VALVE CLEARANCE under ADJUSTMENTS.

Scheme 28

1. Disconnect negative battery cable. Remove transaxle assembly. See appropriate article in CLUTCHES (M/T models) or TRANSMISSION SERVICING (A/T models).
2. Place reference mark on clutch pressure plate (M/T models) and flywheel for installation reference. Remove pressure plate and clutch disc (if equipped). Remove flywheel. Pry seal from cover.

Note. When installing new crankshaft oil seal, align hole in Driver Attachment (07948-SB00101) with pin on crankshaft.

Apply a light coat of engine oil to crankshaft and lip of new seal. Using Seal Driver (07749-0010000) and Driver Attachment (07948-SB00101), install new seal. To complete installation, reverse removal procedure.

Remove timing belt. See TIMING BELT. Remove camshaft pulleys and timing belt back cover. (Scheme 27) See CAMSHAFTS. Remove retaining bolts, water pump, and "O" rings.

1. Clean gasket surfaces. Install water pump. Install NEW "O" rings. To complete installation, reverse removal procedure. Tighten bolts to specifications. See «TORQUE SPECIFICATIONS»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r__torque-specifications) .
2. Adjust timing belt tension. See «TIMING BELT TENSION»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r__timing-belt-tension) under ADJUSTMENTS. Fill and bleed air from cooling system. See «BLEEDING COOLING SYSTEM»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r__bleeding-cooling-system) .

Drain engine oil. Remove oil pan bolts and nuts. Remove oil pan. Clean gasket mating surfaces. Install oil pan. Tighten bolts/nuts to specification. See TORQUE SPECIFICATIONS .

CYLINDER HEAD

Note. Identify valves and valve springs as they are removed so that each item can be reinstalled in its original position.

Ensure all mating surfaces are clean. Measure cylinder head warpage. If warpage is less than 0.002" (0.05 mm), resurfacing is not required. If warpage is 0.002-0.008" (0.05-0.20 mm) or greater, resurface cylinder head. Maximum resurface limit is 0.008" (0.20 mm).

Valve Springs

Measure free length of valve springs. If measurements are not within specification, replace valve springs. See VALVES & VALVE SPRINGS under ENGINE SPECIFICATIONS.

Valve Stem Oil Seals

Intake and exhaust valve stem seals are not interchangeable. Intake valve stem seals have a White spring around neck of seal. Oil seals for exhaust valves have a Black spring around neck of seal. Use Valve Stem Seal Installer (KD-2899) to install valve stem seals.

Valve Guide Inspection

Measure valve guide clearance using a dial indicator placed on valve head. Zero dial indicator. With valve .4" (10 mm) off seat, rock valve stem from side to side. Replace valve guides if stem-to-guide clearance is not within specification. See CYLINDER HEAD under ENGINE SPECIFICATIONS.

Valve Guide Removal

1. Use a hot plate or oven to heat cylinder head to 300°F (150°C). Use Valve Guide Driver (07742-0010100), or fabricate valve guide remover from an air-impact chisel. (Scheme 29) Using an air hammer and valve guide remover, drive valve guide 0.079" (2.0 mm) toward combustion chamber. CAUTION: Drill guides in extreme cases only. Cylinder head damage can occur if valve guide breaks.
2. Turn head over. Working from combustion chamber side of head, drive valve guide out toward camshaft side of head. If valve guide does not move, drill valve guide with a 5/16" drill bit and try again to drive out guide.

Scheme 29

Valve Guide Installation

1. Cool new valve guides in freezer for about one hour. Remove new valve guides from freezer as needed. Install valve guides using .22" (5.5 mm) Valve Guide Driver (07742-0010100).
2. Install new valve guides from camshaft side of cylinder head. Drive each guide into heated head until driver bottoms on head. If replacing all valve guides, reheat cylinder head as necessary.
3. Valve guide installed height must be 0.4941-0.5138" (12.55-13.05 mm). Using cutting oil, ream new valve guides by rotating Valve Guide Reamer (07HAH-PJ7010A) clockwise full length of valve guide bore. Measure valve stem-to-guide clearance. See «CYLINDER HEAD»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r) under ENGINE SPECIFICATIONS.

Note. Always reface valve seat after replacing valve guide.

Valve Seat

Valve seat replacement procedure is not available.

Valve Seat Correction Angles

If valve guides are to be replaced, perform guide replacement before refacing valve seats. If seat width is too wide, use 60-degree stone to raise seat, or 30-degree stone to lower seat. Ensure valve seat width is within specification. See CYLINDER HEAD under ENGINE SPECIFICATIONS.

Valve Stem Installed Height

After servicing valves, measure valve stem installed height. (Scheme 30) If valve stem installed height exceeds 1.5033" (38.184 mm) for intake valve or 1.4915" (37.884 mm) for exhaust valves, replace valve. If valve stem installed height still exceeds limit, replace cylinder head.

Scheme 30

Place a rubber band around each set of rocker arms to keep them together. Remove intake and exhaust rocker shaft oil control orifices. Thread a 12-mm bolt into end of rocker shaft. Pull bolt head to remove rocker shaft and rocker arms. Tag parts for installation reference as they are removed.

1. Push rocker arm pistons manually. If they do not move smoothly, replace rocker arm assembly. Remove lost motion assembly from cylinder head and test by pushing plunger with finger. If lost motion assembly does not move smoothly, replace assembly.
2. Measure diameter of intake and exhaust rocker shafts at first rocker location. Measure ID or rocker arms and check for out of round condition. Repeat for all rocker arms. If out of round condition is detected replace rocker arms. Always replace rocker arms as a set of 3.

Lubricate all components before installation. Install all components into original locations. Back off valve adjuster screws before installation. If holes in cylinder head and rocker shafts are not in line, turn shaft with a 12-mm bolt threaded into end. To complete installation, reverse removal procedure.

Piston & Rod Assembly

1. Each rod is sorted into one of 4 tolerance ranges. Size depends on crank journal bore. Number from 21 to 26 is stamped on side of rod big end. Any combination of numbers from 21 to 26 may be found on any engine. NOTE: Reference numbers are for big end bore code and do not indicate rod position in engine.
2. Nominal connecting rod big bore size is 1.89" (48.0 mm). Install piston and connecting rod so arrow on top of piston is toward timing belt and numbers marked on connecting rod face timing belt.

Note. All replacement piston pins are oversize.

Piston Pin Removal

1. Install Piston Base Head (07HAF-PL20102) and Piston Pin Base Insert (07GAF-PH60300) into Base (07973-6570500). Turn handle on Piston Pin Driver Head (07973-PE00320) so piston driver length is 2.035" (51.69 mm). (Scheme 31)
2. Insert Piston Driver Shaft (07973-PE00310) into Pilot Collar (07LAF-PR30100). Place piston onto base. Press out piston pin using a hydraulic press. When removing or installing piston pin, set piston in press with embossed side facing up. Align lugs on base insert with recessed part of piston.

Scheme 31

Piston Pin Inspection

1. Measure diameter of piston pin. Zero dial indicator to piston pin diameter. Insert gauge into piston boss to measure piston pin-to-piston clearance. If clearance exceeds specification, install oversize piston pin and recheck clearance. See «PISTONS, PINS & RINGS»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r) under ENGINE SPECIFICATIONS.
2. Measure difference between piston pin diameter and connecting rod small end diameter. Ensure interference fit between piston and connecting rod is within specification. See «PISTONS, PINS & RINGS»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r) under ENGINE SPECIFICATIONS.

Piston Pin Installation

1. Ensure piston and connecting rod are positioned so arrow on top of piston is toward timing belt and numbers marked on connecting rod face timing belt. Turn handle on Piston Pin Driver (07973-PE00320) so piston driver length is 2.035" (51.69 mm).
2. Install Pilot Collar (07LAF-PR30100) into piston and connecting rod. Lightly oil new piston pin. Place piston onto base. Press in piston pin.

Fitting Pistons

1. Using a feeler gauge, ensure piston-to-cylinder bore clearance is within specification. See «PISTONS, PINS & RINGS»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r) under ENGINE SPECIFICATIONS. If piston clearance exceeds service limit, re-bore cylinder and install oversize piston.
2. Measure piston diameter at a point 0.6" (15 mm) from bottom of piston skirt. If diameter is not within specification, replace piston. See «PISTONS, PINS & RINGS»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r) under ENGINE SPECIFICATIONS.

Piston Rings

1. Using inverted piston, push NEW piston ring into cylinder bore 0.6-0.8" (15-20 mm) from bottom. Measure piston ring end gap. Repeat for each ring. See «PISTONS, PINS & RINGS»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r) under ENGINE SPECIFICATIONS.
2. Clean piston ring grooves thoroughly. Install piston rings with identification mark toward top of piston. Using a feeler gauge, measure piston ring side clearance between ring and ring land.
3. If ring lands are excessively worn, replace piston. See «PISTONS, PINS & RINGS»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r) under ENGINE SPECIFICATIONS. Align piston ring end gaps properly on piston. (Scheme 32)

Scheme 32

Note. A number indicating connecting rod bore is stamped on side of each connecting rod and cap. Connecting rod journal diameter codes (letters) are stamped on crankshaft counterweight pads. (Scheme 33) Use both codes when ordering replacement bearings.

Rod Bearings

1. Using Plastigage, measure rod bearing oil clearance. On B18C1 engine, tighten bearing cap to 33 ft. lbs. (44 N.m). On B18C5 engine, use connecting rod gauge. Install nuts finger tight. Install connecting rod gauge. Tighten nuts until connecting rod gauge reads .005-.006" (0.13-0.15 mm). See «CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r) under ENGINE SPECIFICATIONS.
2. If oil clearance is not within specification, install a new bearing set (same color code) and recheck oil clearance. DO NOT shim or file cap to adjust oil clearance.
3. If oil clearance is still incorrect, try next larger or smaller bearing. Measure oil clearance once more. If proper oil clearance cannot be obtained by using larger or smaller bearings, replace crankshaft and repeat procedure.

Scheme 33

Note. A letter indicating main journal bore diameters is stamped on cylinder block. (Scheme 34) Use these codes, together with crankshaft main journal diameter numbers, when ordering replacement bearings.

Crankshaft & Main Bearings

1. Remove rear crankshaft oil seal cover, oil screen, oil pump, and baffle plate. Rotate crankshaft so No. 2 and 3 crankpins are at bottom. Remove all connecting rod caps and bearings.
2. Mark all main bearing caps for assembly reference. Remove main bearing caps and bearing halves. Lift crankshaft from block, being careful not to damage journals.
3. Using a lathe or "V" blocks to support crankshaft, measure crankshaft runout, out-of-round, and taper. If any measurement exceeds service limit, replace crankshaft. See «CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r) under ENGINE SPECIFICATIONS.
4. Install crankshaft into block. Measure oil clearance with Plastigage. Tighten main bearing caps No. 1 and 5 to 56 ft. lbs. (76 N.m). Tighten main bearing caps No. 2, 3 and 4 to 49 ft lbs. (67 N.m). If oil clearance is not within specification, install a new bearing set (same color code) and recheck oil clearance.
5. If oil clearance is still incorrect, try next larger or smaller bearing and measure oil clearance once more. If proper oil clearance cannot be obtained by using larger or smaller bearings, replace crankshaft and repeat procedure.

Scheme 34

Thrust Bearing

1. Measure crankshaft end play with a dial indicator. If end play exceeds specification, inspect thrust washers and thrust surface of crankshaft. See «CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r) under ENGINE SPECIFICATIONS.
2. Replace worn parts as necessary. Thrust washer thickness is fixed. DO NOT change thrust washer thickness by grinding or shimming. Install thrust washers with grooved side out.

Cylinder Block

1. Measure cylinder bore out-of-round and taper. If either out-of-round or taper exceeds specification, re-bore cylinder for oversize pistons. If any cylinder exceeds oversize bore service limit, replace cylinder block. See «CYLINDER BLOCK»(/acura/integra/iii-1993-2001/remont/mechanical/#18l-4-cyl-vtec-gs-r-type-r) under ENGINE SPECIFICATIONS.
2. Using a feeler gauge and straightedge, measure cylinder block deck surface warpage. Service limit is 0.003" (0.07 mm). If cylinder bore is okay, hone cylinder to obtain a 60-degree crosshatch pattern. After honing, wash cylinder bore with hot soapy water. Air-dry cylinder bore, and apply engine oil to prevent rusting.

ENGINE LUBRICATION SYSTEM

A rotor-type oil pump draws oil from oil pan and delivers it under pressure to main and connecting rod bearings. Oil jets at bottom of block spray oil upward to lubricate piston and cylinder wall. An oil passage carries oil to camshaft and rocker arms. Oil spray lubricates valve stems.

Crankcase Capacity

Crankcase capacity is 4.2 qts. (4.0L) including oil filter. Oil capacity is 5.1 qts. (4.8L) after engine overhaul.

Oil Pressure

Oil pressure at idle should be 10 psi (0.7 kg/cm 2 ) minimum. Oil pressure at 3000 RPM should be 50 psi (3.5 kg/cm 2 ) minimum.

Removal & Disassembly

Remove oil pan. See OIL PAN under REMOVAL & INSTALLATION. Remove oil screen and oil pump assembly. Remove screws from oil pump housing. Separate housing and cover.

Measure radial clearance between inner and outer rotors. Measure axial clearance between housing and outer rotor. Inspect both rotors and pump housing for scoring or other damage. Replace components if clearance measurements are not within specification. See OIL PUMP SPECIFICATIONS .

OIL PUMP SPECIFICATIONS

Reassembly & Installation

1. Reassemble oil pump, using Loctite on pump housing screws. Ensure oil pump turns freely. Install dowel pins and NEW "O" ring into cylinder block. Clean oil pump mating surfaces. Apply Liquid Sealant (08718-0001) to cylinder block mating surface of oil pump.
2. Apply sealant to threads of inner bolt holes. Install oil pump before sealant dries. Install oil screen and oil pump. Wait at least 30 minutes before filling crankcase with oil. To complete installation, reverse removal procedure.

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

ENGINE SPECIFICATIONS

GENERAL SPECIFICATIONS

CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS

CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS

CONNECTING RODS

CONNECTING RODS

PISTONS, PINS & RINGS

PISTONS, PINS & RINGS

CYLINDER BLOCK

VALVES & VALVE SPRINGS

VALVES & VALVE SPRINGS

CYLINDER HEAD

CAMSHAFT

CAMSHAFT

VALVE STEM INSTALLED HEIGHT (1)

See also:
• ENGINE OVERHAUL PROCEDURES
• VALVE CLEARANCE SPECIFICATIONS
• TORQUE SPECIFICATIONS
• FUEL PRESSURE RELEASE
• BLEEDING COOLING SYSTEM
• TIMING BELT TENSION