Engine Nissan Stanza II

Note. Remove the engine and transaxle as a single unit.

Removal

1. Mark hood hinge positions. Remove hood. Remove battery and support bracket. Remove radiator reservoir tank. Remove air intake duct. Remove undertray. Drain coolant. Remove radiator and cooling fan.
2. Remove power steering pump, bracket, A/C compressor, and idler pulley (if equipped). DO NOT discharge systems. Secure components away from engine. Disconnect front exhaust pipe from exhaust manifold.
3. Disconnect accelerator cable. Disconnect linkage, cables, vacuum hoses, and wiring from transaxle. Remove speedometer cable and plug bore. Remove EGR vacuum control valve, with bracket, from body.
4. Remove lower ball joints and discard mounting nuts. Drain gear oil from transaxle. Loosen 3 top bolts from struts. Remove both drive shafts from transaxle. Ensure oil seals are not damaged.
5. Label and disconnect all vacuum, fuel, air hoses, and electrical wiring between engine and chassis. Attach lifting sling and engine hoist to engine. Disconnect engine and transaxle mounts. Lift engine and transaxle from vehicle.

Installation

1. Install engine mounting brackets and insulators on engine. Align notches in left side mount support and collar when installing support. There should be no clearance between mount support and vehicle body when installed.
2. When installing front mount support, position oblong hole in support so the insulator is in center of bracket. With mount supports installed, tighten buffer rod adjusting bolt to prevent rubber from deforming.
3. Reverse removal procedure to install engine and transaxle. Use new nuts when installing ball joints. Ensure all hoses, cables, and wires are properly attached.

1. Remove air intake duct. Disconnect throttle body cable. Disconnect main fuel line and plug opening. Remove intake manifold support bracket.
2. Remove all wiring, coolant, and vacuum hoses interfering with intake manifold removal. Remove fuel pump and EGR valve assembly. Remove nuts attaching intake manifold to cylinder head. Remove intake manifold assembly.

Install intake manifold assembly using new gaskets. Manifold and head mating surfaces must be free of nicks or other damage. To complete installation, reverse removal procedure.

1. Remove exhaust air induction tube bracket and EGR tube at EGR valve. If necessary, remove distributor and high tension cable. Remove exhaust manifold cover.
2. Disconnect front exhaust pipe from manifold. When removing exhaust manifold mounting bolts, note center mount nut is a different diameter than the others. Remove manifold.

Install exhaust manifold assembly using new gaskets. Manifold and head mating surfaces must be free of nicks or other damage. To complete installation, reverse removal procedure.

1. Turn crankshaft until No. 1 piston is at TDC on compression stroke. Remove alternator and bracket. Remove power steering pump and A/C compressor (if equipped). DO NOT discharge systems. Secure components away from engine.
2. Remove exhaust and intake manifolds as previously described. Remove valve cover and gasket. Remove oil and water pumps. Note bolt lengths and locations for reassembly reference.
3. Remove thermostat housing and distributor, if necessary. Remove crankshaft pulley and damper. Remove upper and lower outer front dust cover mount bolts. Remove covers and gaskets. CAUTION: After timing belt is removed, DO NOT rotate crankshaft or camshaft. NOTE: There are 3 different lengths of cylinder head bolts. Note locations during removal for reassembly reference.
4. Disconnect all hoses, cables, and wires interfering with cylinder head removal. Remove fuel pump mounting bolts, spacer, and pump. Mark timing belt rotation direction. Loosen timing belt tensioner and remove timing belt.
5. Loosen head bolts, in reverse order of tightening sequence. Remove cylinder head. (Scheme 1)

Inspection

1. Check cylinder head for cracks, flaws, or damage. Inspect cylinder head and block mating surfaces for distortion. Distortion limit is.004" (.10 mm).
2. If beyond limit, refinish surface. Maximum machining limit of cylinder head or block is.008" (.20 mm). Replace cylinder head and/or block if machined or warped beyond service limit. (Scheme 1)

Note. DO NOT apply sealant to mating surfaces of cylinder block and head.

Scheme 1

Scheme 2

Scheme 3

1. Thoroughly clean cylinder head and block mating surfaces. Ensure No. 1 piston is at TDC on compression stroke. Install new cylinder head gasket on dowel pins. Install cylinder head.
2. Install cylinder head bolts. Temporarily tighten all cylinder head bolts in sequence to 22 ft. lbs. (29 N.m). (Scheme 1) Tighten all cylinder head bolts in sequence to 58 ft. lbs. (79 N.m). Loosen all cylinder head bolts completely. Tighten all cylinder head bolts in sequence to 54-61 ft. lbs. (74-83 N.m). Install timing belt and front cover.
3. To install distributor, align mark on distributor gear to mark on shaft. Turn rotor shaft counterclockwise, on distributor cap side, about 15 degrees and install.
4. After checking bolts for correct location, install water and oil pumps. Install drive belt tensioner. DO NOT tighten tensioner bolts to final specification before drive belt is installed.
5. Install timing belt plate and crankshaft sprocket with mating marks facing forward. See «TIMING BELT»(ref-25454-S09817107702001011500000). (Scheme 2)
6. Install new crankshaft front oil seal in oil pump. Install upper and lower front covers with new gaskets. Tighten mounting bolts. Install crankshaft plate, pulley damper, and pulley.
7. To complete installation, reverse removal procedure. After engine has run for several minutes, allow it to cool and retighten cylinder head bolts to specification.

1. Turn crankshaft until No. 1 piston is at TDC on compression stroke. Remove cooling fan, radiator shroud and accessory drive belts. NOTE: After timing belt is removed, DO NOT rotate crankshaft or camshaft.
2. Remove upper and lower dust cover mount bolts. Remove upper and lower covers and gaskets. Remove timing belt tensioner, bracket, and timing belt.

1. DO NOT tighten tensioner bolts to final specification before drive belt is installed. Install timing belt. Align belt mark to camshaft and crankshaft sprocket marks. (Scheme 2)
2. Tighten belt tensioner and assemble spring. To set spring, hook one end on bolt "B" side. Hook the other end on tensioner bracket pawl. Tighten bolt "B" and then bolt "A". (Scheme 3)
3. Belt tension will automatically be at the specified value. Install lower front cover with gaskets and tighten mount bolts. Install plate and front pulley damper. Complete installation by reversing removal procedure.

1. Remove accessory drive belts. Drain engine oil. Remove oil pan, oil strainer, and gaskets. If necessary, remove water pump. Remove crank pulley, damper, and spacer.
2. Remove timing belt tensioner and timing belt. Remove crankshaft sprocket and spacer. Remove oil pump mounting bolts and oil pump assembly. Drive out front oil seal from oil pump, using a seal driver/installer.

1. Lubricate new oil seal lip with engine oil. Using seal driver/installer, drive seal into position. Align oil pump and crankshaft locating notches and install oil pump assembly.
2. To complete installation, reverse removal procedure. When installing timing belt, ensure crankshaft and camshaft are in proper alignment. See «TIMING BELT»(ref-25454-S09817107702001011500000) .

1. Turn crankshaft until No. 1 piston is at TDC on compression stroke. Remove accessory drive belts. Remove outer, upper, lower, and front dust covers. Remove tensioner and timing belt. Remove valve cover and gasket.
2. Remove fuel pump, spacer, cylinder head rear plate, fuel pump drive cam, and camshaft sprocket. Before rocker arm assembly removal, fully loosen rocker arm adjusting screws.
3. When removing rocker arm assembly, loosen mount bolts evenly, from the outside. Remove assembly. Keep all components in order. Pull camshaft from cylinder head.

Check camshaft to ensure measurements are within specifications. See CAMSHAFT SPECIFICATIONS table.

CAMSHAFT SPECIFICATIONS

1. Coat camshaft with engine oil and carefully install into engine. DO NOT damage camshaft bearing surfaces during installation. Install rocker arm assembly.
2. Install upper, inner dust cover (if equipped), camshaft sprocket, tensioner, timing belt, and related components. Install outer front covers. To complete installation, reverse removal procedure.