Engine Mechanical: Adjustments Infiniti FX45 I

TENSION ADJUSTMENT

Belt tensioning is not necessary, as it is automatically adjusted by auto tensioner.

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1. Remove air duct (inlet). Refer to «AIR CLEANER AND AIR DUCT»(ref-158963-S32645370962005020300000) .
2. Front engine undercover with power tool.
3. With box wrench, and while securely holding the hexagonal part in pulley center of auto tensioner, move wrench handle in the direction of arrow (loosening direction of tensioner). CAUTION: Avoid placing hand in a location where pinching may occur if the holding tool accidentally comes off.
4. Under the above condition, insert a metal bar of approximately 6 mm (0.24 in) in diameter (hexagonal bar wrench shown as example in the figure) through the holding boss to lock auto tensioner pulley arm. Leave auto tensioner pulley arm locked until belt is installed again.
5. Remove alternator, water pump and A/C compressor belt.

Scheme 17

1. Remove air duct (inlet). Refer to «AIR CLEANER AND AIR DUCT»(ref-158963-S32645370962005020300000) .
2. Front engine undercover with power tool
3. Remove alternator, water pump and A/C compressor belt. Refer to «ALTERNATOR, WATER PUMP AND A/C COMPRESSOR BELT»(ref-158963-S25972149542005020300000) .
4. While securely holding the hexagonal protrusion part of auto tensioner pulley with box wrench, move wrench handle in the direction of arrow (loosening direction of tensioner). CAUTION: Avoid placing hand in a location where pinching may occur if holding tool accidentally comes off.
5. Under the above condition, insert a metal bar of approximately 6 mm (0.24 in) in diameter (hexagonal bar wrench shown as example in the figure) through the holding boss to lock auto tensioner pulley arm. Leave auto tensioner pulley arm locked until belt is installed again.
6. Remove power steering oil pump belt.

Adjustment

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1. Thoroughly wipe off engine oil around adjusting shim using rag.
2. Rotate crankshaft to position cam nose on camshaft of valve that must be adjusted upward.
3. Using small screwdriver, turn the round hole of adjusting shim in the direction of the arrow. CAUTION: Perform (the above procedure) while camshaft is not in contact with adjusting shim.
4. Install lifter stopper [SST: 10115120 (J38972-2)] as follows: Except exhaust side of No. 7 and No. 8 cylinder; Place camshaft pliers (SST) around camshaft as shown in the figure. Rotate camshaft pliers so that valve lifter is pushed down. CAUTION: Be careful not to damage cam surface, valve lifter and cylinder head with camshaft pliers. Place lifter stopper between camshaft and the edge of valve lifter to retain valve lifter. CAUTION: Lifter stopper must be placed as close to camshaft bracket as possible. Be careful not to damage cam surface, valve lifter and cylinder head with lifter stopper. Remove camshaft pliers. CAUTION: Camshaft pliers should be removed by rotating it slowly because lifter stopper hits and damages journal portion by rotating camshaft pliers quickly. Exhaust side of No. 7 and No. 8 cylinder; NOTE: Exhaust side of No. 7 and No. 8 cylinder does not have space for installing camshaft pliers [SST: KV10115110 (J38972-1)]. therefore, install lifter stopper [SST: KV10115120 (J38972-2)] according to the following instructions. Rotate crankshaft to press cam nose to the adjusting part of valve lifter. Place lifter stopper between camshaft and the edge of valve lifter to retain valve lifter. CAUTION: Lifter stopper must be placed as close to camshaft bracket as possible. Be careful not to damage cam surface, valve lifter and cylinder head with lifter stopper. Rotate crankshaft slowly 180 degrees clockwise. CAUTION: Rotating crankshaft slowly because lifter stopper hits and damages journal portion by rotating crankshaft quickly.
5. Blow air into the round hole to separate adjusting shim from valve lifter. CAUTION: When blowing, use goggles to protect your eyes.
6. Remove adjusting shim with magnetic hand.
7. Use the equation below to calculate adjusting shim thickness for replacement. Using micrometer, determine thickness of removed shim when measured at center. Calculate thickness of new adjusting shim so valve clearance comes within specified values (Cold value). Valve lifter thickness calculation: t = t1 + (C 1 - C 2 ) t = Valve lifter thickness to be replaced t1 = Removed valve lifter thickness C1 = Measured valve clearance C2 = Standard valve clearance: Intake : 0.30 mm (0.012 in)* Exhaust : 0.33 mm (0.013 in)* *: Approximately 20°C (68°F) Shims are available in 64 sizes from 2.32 mm (0.0913 in) to 2.95 mm (0.1161 in) in steps of 0.01 mm (0.0004 in). Thickness of new adjusting shim can be identified by stamp marks on the reverse side (inside the cylinder).
8. Install new adjusting shim using suitable tool. Install with the surface on which the thickness is stamped facing down.
9. Remove lifter stopper as follows: Except exhaust side of No. 7 and No. 8 cylinder; Perform same procedure for removal, place camshaft pliers (SST). Remove lifter stopper (SST). Remove camshaft pliers. Exhaust side of No. 7 and No. 8 cylinder. Rotate crankshaft slowly 180 degrees clockwise, then remove lifter stopper.
10. Manually rotate crankshaft pulley a few turns.
11. Make sure that the valve clearance is within the standard.
12. Make sure again that the valve clearance for hot engine is within specifications by referring to the specified values. Valve clearance

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1. Remove engine assembly from vehicle. Refer to «ENGINE ASSEMBLY»(ref-158963-S21545795282005020300000) .
2. Remove camshaft relating to valve oil seal to be removed. Refer to «CAMSHAFT»(ref-158963-S21071505232005020300000) .
3. Remove adjusting shims and valve lifters. Refer to «CAMSHAFT»(ref-158963-S21071505232005020300000) . Identify installation positions, and store them without mixing them up.
4. Turn crankshaft until the cylinder requiring new oil seals is at TDC. This will prevent valve from dropping into cylinder.
5. Remove valve collet. Compress valve spring with valve spring compressor, attachment and adapter (SST). Remove valve collet with magnetic hand. CAUTION: When working, take care not to damage valve lifter holes.
6. Remove valve spring retainer and valve spring. CAUTION: Do not remove valve spring seat from valve spring.
7. Remove valve oil seal using valve oil seal puller (SST).

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1. Apply engine oil on new valve oil seal joint and seal lip.
2. Install valve oil seal. Install with valve oil seal drift (SST) to match dimension in the figure.
3. Install in the reverse order of removal after this step.

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1. Remove the following parts: Front engine undercover Radiator; Refer to «REMOVAL AND INSTALLATION»(ref-172394-S31028763572005022800000) . Drive belt; Refer to «DRIVE BELTS»(ref-158963-S21592309282005020300000) . Cooling fan. Rear plate cover; Refer to «OIL PAN AND OIL STRAINER»(ref-158963-S07521548342005020300000) .
2. Set ring gear stopper (SST).
3. Loosen crankshaft pulley bolt, and then pull crankshaft pulley with both hands to remove it. CAUTION: Do not remove crankshaft pulley bolt. Keep loosened crankshaft pulley bolt in place to protect removed crankshaft pulley from dropping. Do not remove balance weight (inner hexagon bolt) at the front of crankshaft pulley.
4. Remove front oil seal using suitable tool. CAUTION: Be careful not to damage front cover and oil pump drive spacer.

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1. Apply engine oil to both oil seal lip and dust seal lip.
2. Using suitable drift, press fit until the height of front oil seal is level with the mounting surface. Suitable drift Outer diameter : 56 mm (2.20 in) Inner diameter : 49 mm (1.93 in) Install it so that each seal lip is oriented as shown in the figure. CAUTION: Be careful not to damage front cover and oil pump drive spacer. Press fit straight and avoid causing burrs or tilting oil seal.
3. Install in the reverse order of removal after this step.

Scheme 36

1. Remove transmission (with transfer) assembly. Refer to «REMOVAL AND INSTALLATION (AWD MODELS)»(ref-171001-S14766714062005012500000) . Remove drive plate. Refer to «CYLINDER BLOCK»(ref-158963-S11965558542005020300000) . Remove engine rear plate. Refer to «CYLINDER BLOCK»(ref-158963-S11965558542005020300000) .
2. Remove rear oil seal using suitable tool. CAUTION: Be careful not to damage crankshaft and oil seal retainer surface.

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1. Apply engine oil to both oil seal lip and dust seal lip.
2. Using suitable drift, press fit until the height of front oil seal is level with the mounting surface. Suitable drift Outer diameter : 102 mm (4.02 in) Inner diameter : 86 mm (3.39 in) Install it so that each seal lip is oriented as shown in the figure. CAUTION: Be careful not to damage crankshaft and rear oil seal retainer. Press fit straight and avoid causing burrs or tilting oil seal.
3. Install in the reverse order of removal after this step.

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1. Warm up engine thoroughly. Then, stop it.
2. Release fuel pressure. Refer to «FUEL SYSTEM PRESSURE RELEASE»(ref-151810-S21305829172003010800000) . Remove fuel pump fuse to avoid fuel injection during measurement.
3. Remove engine cover with power tool. Refer to «ENGINE ROOM COVER»(ref-158963-S06074735262005020300000) .
4. Remove ignition coil and spark plug from each cylinder. Refer to «IGNITION COIL»(ref-158963-S35156859472005020300000) and «SPARK PLUG (PLATINUM-TIPPED TYPE)»(ref-158963-S39600759902005020300000) .
5. Connect engine tachometer (not required in use of CONSULT-II).
6. Install compression gauge with adapter (SST or commercial service tool) onto spark plug hole. Use compression gauge adapter (SST) which is required on No. 7 and No. 8 cylinders. Use compression gauge adapter (if no SST is used) whose picking up end inserted to spark plug hole is smaller than 20 mm (0.79 in) in diameter. Otherwise, it may be caught by cylinder head during removal.
7. With accelerator pedal fully depressed, turn ignition switch to "START" for cranking. When the gauge pointer stabilizes, read the compression pressure and engine RPM. Perform these steps to check each cylinder. Compression pressure: CAUTION: Always use a fully changed battery to obtain specified engine speed. If the engine speed is out of specified range, check battery liquid for proper gravity. Check engine speed again with normal battery gravity. If compression pressure is below minimum value, check valve clearances and parts associated with combustion chamber (valve, valve seat, piston, piston ring, cylinder bore, cylinder head, cylinder head gasket). After the checking, measure compression pressure again. If some cylinders have low compression pressure, pour small amount of engine oil into the spark plug hole of the cylinder to re-check it for compression. If the added engine oil improves the compression, piston rings may be worn out or damaged. Check the piston rings and replace if necessary. If the compression pressure remains at low level despite the addition of engine oil, valves may be malfunctioning. Check valves for damage. Replace valve or valve seat accordingly. If two adjacent cylinders have respectively low compression pressure and their compression remains low even after the addition of engine oil, gaskets are leaking. In such a case, replace cylinder head gaskets.
8. After inspection is completed, install removed parts in the reverse order of removal.
9. Start engine, and make sure that engine runs smoothly.
10. Perform trouble diagnosis. If DTC appears, erase it. Refer to TROUBLE DIAGNOSIS .

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1. Remove engine assembly from vehicle. Refer to «ENGINE ASSEMBLY»(ref-158963-S21545795282005020300000) .
2. Remove exhaust manifold. Refer to «EXHAUST MANIFOLD AND THREE WAY CATALYST»(ref-158963-S19526898532005020300000) .
3. Remove camshaft. Refer to «CAMSHAFT»(ref-158963-S21071505232005020300000) .
4. Remove cylinder head bolts in reverse order as shown in the figure with cylinder head bolt wrench (commercial service tool).
5. Remove cylinder head gaskets.

Scheme 45

1. Cylinder head bolts are tightened by plastic zone tightening method. Whenever the size difference between "d1" and "d2" exceeds the limit, replace them with new one. Limit ("d1" - "d2") : 0.18 mm (0.0071 in)
2. If reduction of outer diameter appears in a position other than "d2", use it as "d2" point.