Engine Mechanical: Diagnosis Infiniti FX35 I

PRECAUTIONS FOR INSPECTION, REPAIR AND REPLACEMENT

Before repairing or replacing, thoroughly inspect parts. Inspect new replacement parts in the same way, and replace if necessary.

Inspection

Check status (fouling, damage, etc.) of air cleaner filter at power duct hole.

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Inspection After Removal

Clean oil strainer if any object attached.

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1. Install oil pan (upper) as the following: Use scraper to remove old liquid gasket from mating surfaces. CAUTION: Do not scratch or damage the mating surfaces when cleaning off old liquid gasket. Also remove old liquid gasket from mating surface of cylinder block. Remove old liquid gasket from the bolt holes and threads. Apply liquid gasket to oil pan gaskets as shown in the figure. Use Genuine RTV Silicone Sealant or equivalent. Refer to RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS . To install, align protrusion of oil pan gasket with notches of front timing chain case and rear oil seal retainer. Install oil pan gasket with smaller arc to front timing chain case side. Install new O-rings on cylinder block and oil pump side. Apply a continuous bead of liquid gasket with tube presser [SST: WS39930000 (-)] to the cylinder block mating surface of oil pan (upper) to a limited portion as shown in the figure. Use Genuine RTV Silicone Sealant or equivalent. Refer to RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS . CAUTION: For bolt holes with marks (5 locations), apply liquid gasket outside the holes. Apply a bead of 4.5 to 5.5 mm (0.177 to 0.217 in) in diameter to area "A". Attaching should be done within 5 minutes after coating. Install oil pan (upper). Tighten bolts in numerical order as shown in the figure. There are two types of mounting bolts. Refer to the following for locating bolts. M8 x 100 mm (3.97 in) : 5, 7, 8, 11 M8 x 25 mm (0.98 in) : Except the above Tighten transmission joint bolts. Refer to «REMOVAL AND INSTALLATION (2WD MODELS)»(ref-171001-S13768524782005012500000) .
2. Install oil strainer to oil pump.
3. Install oil pan (lower) as the following: Use scraper to remove old liquid gasket from mating surfaces. Also remove old liquid gasket from mating surface of oil pan (upper). Apply liquid gasket thoroughly with tube presser [SST: WS39930000 (-)] as in illustration. Use Genuine RTV Silicone Sealant or equivalent. Refer to RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS . NOTE: Attaching should be done within 5 minutes after coating. Tighten bolts in numerical order as shown in the figure.
4. Install oil pan drain plug. Refer to illustration of components of former page for installation direction of washer.
5. Install in the reverse order of removal after this step. NOTE: At least 30 minutes after oil pan is installed, pour engine oil.

Inspection After Installation

1. Check the engine oil level and add engine oil. Refer to ENGINE OIL .
2. Start engine, and check there is no leak of engine oil.
3. Stop engine and wait for 10 minutes.
4. Check the engine oil level again. Refer to ENGINE OIL .

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Clean oil strainer if any object attached.

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1. Install axle pipe to oil pan, if removed. Lubricate O-ring groove of axle pipe, O-ring, and O-ring joint of oil pan with new engine oil. Install axle pipe to oil pan from axle pipe flange side (LH side) using a suitable drift [43 - 57 mm (1.69 - 2.24 in)]. CAUTION: Insert it with care to prevent O-ring from sliding.
2. Install oil pan (upper) as the following: Use scraper to remove old liquid gasket from mating surfaces. CAUTION: Do not scratch or damage the mating surfaces when cleaning off old liquid gasket. Also remove old liquid gasket from mating surface of cylinder block. Remove old liquid gasket from the bolt holes and threads. Apply liquid gasket to oil pan gaskets as shown in the figure. Use Genuine RTV Silicone Sealant or equivalent. Refer to RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS . To install, align protrusion of oil pan gasket with notches of front timing chain case and rear oil seal retainer. Install oil pan gasket with smaller arc to front timing chain case side. Install new O-rings on cylinder block and oil pump side. Apply a continuous bead of liquid gasket with tube presser [SST:WS39930000 (-)] to the cylinder block mating surface of oil pan (upper) to a limited portion as shown in the figure. Use Genuine RTV Silicone Sealant or equivalent. Refer to RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS . CAUTION: For bolt holes with marks (5 locations), apply liquid gasket outside the holes. Apply a bead of 4.5 to 5.5 mm (0.177 to 0.217 in) in diameter to area "A". Attaching should be done within 5 minutes after coating. Install oil pan (upper). Tighten bolts in numerical order as shown in the figure. There are two types of mounting bolts. Refer to the following for locating bolts. M8 X 100 mm (3.97 in) : 5, 7, 8, 11 M8 X 25 mm (0.98 in) : Except the above Tighten transmission joint bolts. Refer to «REMOVAL AND INSTALLATION (AWD MODELS)»(ref-171001-S14766714062005012500000) .
3. Install oil strainer to oil pump.
4. Install oil pan (lower) in the order below. Apply liquid gasket thoroughly with tube presser [SST: WS39930000 (-)] as in illustration. Use Genuine RTV Silicone Sealant or equivalent. Refer to RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS . NOTE: Attaching should be done within 5 minutes after coating. Tighten bolts in numerical order as shown in the figure.
5. Install oil pan drain plug. Refer to illustration of components of former page for installation direction of washer.
6. Install in the reverse order of removal after this step. NOTE: At least 30 minutes after oil pan is installed, pour engine oil.

1. Check the engine oil level and add engine oil. Refer to ENGINE OIL .
2. Start engine, and check there is no leak of engine oil.
3. Stop engine and wait for 10 minutes.
4. Check the engine oil level again. Refer to ENGINE OIL .

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Use standard type spark plug for normal condition.

The hot type spark plug is suitable when fouling occurs with the standard type spark plug under conditions such as

1. Frequent engine starts
2. Low ambient temperatures

The cold type spark plug is suitable when spark knock occurs with the standard type spark plug under conditions such as

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1. Extended highway driving
2. Frequent high engine revolution Gap (Nominal) : 1.1 mm (0.043 in)

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1. Before starting engine, check the levels of engine coolant, lubrications and working fluid. If less than required quantity, fill to the specified level.
2. Run engine to check for unusual noise and vibration.
3. Warm up engine thoroughly to make sure there is no leakage of engine coolant, engine oil and working fluid, fuel and exhaust gas.
4. Bleed air from passages in pipes and tubes of applicable lines, such as in cooling system.
5. After cooling down engine, again check amounts of engine coolant, engine oil and working fluid. Refill to specified level, if necessary.

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Note. This section describes procedures for removing/installing front timing chain case and timing chain related parts, and rear timing chain case, when oil pan (upper) needs to be removed/installed for engine overhaul, etc. To remove/install front timing chain case, timing chain, and its related parts without removing oil pan (upper), refer to FRONT TIMING CHAIN CASE .

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1. Place vehicle onto lift.
2. Remove front tire.
3. Disconnect negative battery terminal.
4. Remove engine cover with power tool. Refer to «INTAKE MANIFOLD COLLECTOR»(ref-158850-S25261397642005020300000) .
5. Remove air cleaner case assembly. Refer to «AIR CLEANER AND AIR DUCT»(ref-158850-S12244247462005020300000) .
6. Remove front and rear engine undercover with power tool.
7. Drain engine coolant from radiator. Refer to CHANGING ENGINE COOLANT .
8. Drain engine oil from oil pan. Refer to CHANGING ENGINE OIL .
9. Remove engine harnesses.
10. Remove intake manifold collector (upper and lower) with power tool. Refer to «INTAKE MANIFOLD COLLECTOR»(ref-158850-S25261397642005020300000) .
11. Remove radiator cooling fan assembly. Refer to «ELECTRIC COOLING FANS»(ref-164448) (FX35) or «ELECTRIC COOLING FANS»(ref-164430) (FX45).
12. Remove A/C compressor from bracket with piping connected, and temporarily secure it aside. Refer to «COMPONENTS»(ref-171325-S14788335622005020800000) .
13. Remove power steering oil pump from bracket with piping connected, and temporarily secure it aside. Refer to POWER STEERING OIL PUMP .
14. Remove power steering oil pump bracket. Refer to POWER STEERING OIL PUMP .
15. Remove alternator. Refer to «GENERATOR»(ref-166067-S04166173422004091000000) .
16. Remove water bypass hose, water hose clamp and idler pulley bracket from front timing chain case.
17. Remove oil pan (upper and lower). Refer to «OIL PAN AND OIL STRAINER»(ref-158850-S11058956642005020300000) .
18. Remove right and left intake valve timing control covers with power tool. Loosen bolts in reverse order as shown. Use seal cutter [SST: KV10111100 (J37228)] or an equivalent tool to cut liquid gasket for removal. CAUTION: Shaft is internally jointed with intake camshaft sprocket center hole. When removing, keep it horizontal until it is completely disconnected.
19. Remove collared O-ring from front timing chain case (left and right side).
20. Remove right and left rocker covers. Refer to «ROCKER COVER»(ref-158850-S25733701052005020300000) .
21. Obtain compression TDC of No. 1 cylinder as follows: Rotate crankshaft pulley clockwise to align timing mark (grooved line without color) with timing indicator. Make sure intake and exhaust cam noses on No. 1 cylinder (engine front side of right bank) are located as shown. If not, turn crankshaft one revolution (360°) and align as shown.
22. Remove crankshaft pulley with the following procedure: Remove rear cover plate (2WD) or starter motor (AWD) and set ring gear stopper (SST) as shown in the figure. Refer to «REMOVAL & INSTALLATION»(ref-167750-S19717379932004102000000) . Loosen crankshaft pulley bolt and locate bolt seating surface as 10 mm (0.39 in) from its original position. CAUTION: Do not remove crankshaft pulley bolt as it will be used as a supporting point for suitable puller. Place suitable puller tab on holes of crankshaft pulley, and pull crankshaft pulley through. CAUTION: Do not put suitable puller tab on crankshaft pulley periphery, as this will damage internal damper.
23. Remove front timing chain case. Loosen mounting bolts with power tool in reverse order as shown. Insert suitable tool into the notch at the top of front timing chain case as shown (1). Pry off case by moving tool as shown (2). Use seal cutter [SST: KV10111100 (J37228)] or an equivalent tool to cut liquid gasket for removal. CAUTION: Do not use screwdrivers or something similar. After removal, handle it carefully so it does not tilt, cant, or warp under a load.
24. Remove O-rings from rear timing chain case.
25. Remove water pump cover and chain tensioner cover from front timing chain case. Use seal cutter [SST: KV10111100 (J37228)] or an equivalent tool to cut liquid gasket for removal.
26. Remove front oil seal from front timing chain case using a suitable tool. Use screwdriver for removal. CAUTION: Be careful not to damage front timing chain case.
27. Remove timing chain tensioner (primary) as the following: Pull lever down and release plunger stopper tab. Plunger stopper tab can be pushed up to release (coaxial structure with lever). Insert stopper pin into tensioner body hole to hold lever, and keep the tab released. NOTE: An Allen wrench [2.5 mm (0.098 in)] is used for a stopper pin as an example. Insert plunger into tensioner body by pressing slack guide. Keep slack guide pressed and hold it by pushing stopper pin through the lever hole and body hole. Remove mounting bolts and remove timing chain tensioner (primary).
28. Remove internal chain guide, tension guide and slack guide. NOTE: Tension guide can be removed after removing timing chain (primary).
29. Remove timing chain (primary), tension guide and crankshaft sprocket. CAUTION: After removing timing chain, do not turn crankshaft and camshaft separately, or valves will strike piston heads.
30. Remove timing chain (secondary) and camshaft sprockets as the following: Attach a suitable stopper pin to right and left camshaft chain tensioners (for secondary timing chains). NOTE: For removal and installation of secondary chain tensioner, refer to «CAMSHAFT»(ref-158850-S06127113932005020300000) . (Removing No. 1 camshaft bracket is required.) Remove intake and exhaust camshaft sprocket bolts. Apply paint to timing chain and camshaft sprockets for alignment during installation. Secure the hexagonal portion of camshaft using a wrench to loosen mounting bolts. Remove timing chain (secondary) together with camshaft sprockets. Turn camshaft slightly to secure slackness of timing chain on timing chain tensioner (secondary) side. Insert 0.5 mm (0.020 in)-thick metal or resin plate between timing chain and timing chain tensioner plunger (guide). Remove timing chain (secondary) together with camshaft sprockets with timing chain loose from guide groove. CAUTION: Be careful of plunger coming-off when removing timing chain (secondary). This is because plunger of timing chain tensioner (secondary) moves during operation, leading to coming-off of fixed stopper pin. NOTE: Camshaft sprocket (INT) is two-for-one structure of primary and secondary sprockets. When handling camshaft sprocket (INT), be careful of the following: CAUTION: Handle carefully to avoid any shock to camshaft sprocket. Do not disassemble. (Do not loosen bolts "A" and "B" as shown in the figure).
31. Remove rear timing chain case as follows: Loosen and remove mounting bolts in reverse order as shown. Cut sealant using a seal cutter [SST: KV10111100 (J37228)] or an equivalent tool and remove rear timing chain case. CAUTION: Do not remove plate metal cover of engine oil passage. After removing rear timing chain case, do not apply any load which affects flatness.
32. Remove O-rings from cylinder head.
33. Remove O-rings from cylinder block.
34. Remove timing chain tensioners (secondary) from cylinder head as the following, if necessary. Remove No. 1 camshaft brackets. Refer to «REMOVAL»(ref-158850-S28579215612005020300000) . Remove timing chain tensioners (secondary) with stopper pin attached.
35. Use a scraper to remove all traces of liquid gasket from front and rear timing chain cases, and opposite mating surfaces. CAUTION: Be careful not to allow gasket fragments to enter oil pan. Remove old liquid gasket from the bolt hole and thread.
36. Use a scraper to remove all traces of liquid gasket from water pump cover, chain tensioner cover and intake valve timing control covers.

1. Before starting engine, check the levels of engine coolant, lubrications and working fluid. If less than required quantity, fill to the specified level.
2. Run engine to check for unusual noise and vibration.
3. Warm up engine thoroughly to make sure there is no leakage of engine coolant, engine oil and working fluid, fuel and exhaust gas.
4. Bleed air from passages in pipes and tubes of applicable lines, such as in cooling system.
5. After cooling down engine, again check amounts of engine coolant, engine oil and working fluid. Refill to specified level, if necessary.

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1. Remove front timing chain case, camshaft sprocket, timing chain and rear timing chain case. Refer to «TIMING CHAIN»(ref-158850-S12050631142005020300000) .
2. If necessary, remove camshaft position sensor (PHASE) (right and left banks) from cylinder head back side. CAUTION: Handle carefully to avoid dropping and shocks. Do not disassemble. Do not allow metal powder to adhere to magnetic part at sensor tip. Do not place sensors in a location where they are exposed to magnetism.
3. Remove intake valve timing control solenoid valve from No. 1 camshaft bracket.
4. Remove intake and exhaust camshaft brackets. Mark camshafts, camshaft brackets, and bolts so they are placed in the same position and direction for installation. Equally loosen camshaft bracket bolts in several steps in the reverse order as shown.
5. Remove camshaft.
6. Remove valve lifter. Identify installation positions, and store them without mixing them up.
7. Remove secondary timing chain tensioner from cylinder head. Remove chain tensioner with its stopper pin attached. NOTE: Stopper pin was attached when secondary timing chain was removed.

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1. Put V block on precise flat bed, and support No. 2 and No. 4 journal of camshaft. CAUTION: Do not support journal No. 1 (on the side of camshaft sprocket) because it has a different diameter from the other three locations.
2. Set dial gauge vertically to No. 3 journal.
3. Turn camshaft to one direction with hands, and measure camshaft runout on dial gauge. (Total indicator reading) Standard : Less than 0.05 mm (0.0020 in)
4. If it exceeds the standard, replace camshaft.

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1. Measure camshaft cam height. Standard cam height (intake and exhaust): 44.865 - 45.055 mm (1.7663 - 1.7738 in) Cam wear limit: 0.2 mm (0.008 in)
2. If wear is beyond the limit, replace camshaft.

Perform inspection as follows after removal, installation or replacement of camshaft or valve-related parts, or if there is unusual engine conditions regarding valve clearance.

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1. Remove right and left rocker covers with power tool. Refer to «ROCKER COVER»(ref-158850-S25733701052005020300000) .
2. Measure valve clearance as below: Set No. 1 cylinder at TDC of its compression stroke. Rotate crankshaft pulley clockwise to align timing mark (grooved line without color) with timing indicator. Make sure No. 1 cylinder intake and exhaust cam nose is facing in direction shown in figure. If not, rotate crankshaft pulley 360° clockwise (when viewed from front). Using a feeler gauge, measure valve clearance. Valve clearance standard: Cold Intake : 0.26 - 0.34 mm (0.010 - 0.013 in) Exhaust : 0.29 - 0.37 mm (0.011 - 0.015 in) Hot Hot* Intake : 0.304 - 0.416 mm (0.012 - 0.016 in) Exhaust : 0.308 - 0.432 mm (0.012 - 0.016 in) *: Approximately 80°C (176°F) (Reference data) No. 1 cylinder at compression TDC Rotate crankshaft by 240° clockwise (when viewed from front) to align No. 3 cylinder at TDC of its compression stroke. NOTE: Crankshaft pulley mounting bolt flange has a stamped line every 60°. They can be used as a guide to rotation angle. No. 3 cylinder at compression TDC Rotate crankshaft by 240 degrees clockwise (when viewed from engine front) to align No. 5 cylinder at TDC of compression stroke. No. 5 cylinder at compression TDC CAUTION: If inspection was carried out with cold engine, make sure values with fully warmed up engine are still within specifications.
3. For measurements that are outside the specified range, perform «ADJUSTMENT»(ref-158850-S22596834392005020300000) .