Engine Mechanical: Adjustments Infiniti FX35 I

TENSION ADJUSTMENT

Scheme 17

1. Remove front engine undercover with power tool.
2. Loosen idler pulley lock nut (A) and adjust tension by turning adjusting bolt (B). For specified belt tension, refer to «CHECKING DRIVE BELTS»(ref-158850-S16142496872005020300000) .
3. Tighten nut (A). 34.8 N.m (3.5 kg-m, 26 ft-lb)

Adjustment

1. Perform adjustment depending on selected head thickness of valve lifter.
2. The specified valve lifter thickness is the dimension at normal temperatures. Ignore dimensional differences caused by temperature. Use the specifications for hot engine condition to adjust.

Scheme 18

Scheme 19

1. Remove camshaft. Refer to «REMOVAL»(ref-158850-S28579215612005020300000).
2. Remove valve lifters at the locations that are outside the standard.
3. Measure the center thickness of the removed valve lifters with a micrometer.
4. Use the equation below to calculate valve lifter thickness for replacement. Valve lifter thickness calculation: Thickness of replacement valve lifter = t1 + (C1 - C2) t1 = Thickness of removed valve lifter 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) Thickness of a new valve lifter can be identified by stamp marks on the reverse side (inside the cylinder). Stamp mark 788U or 788R indicates 7.88 mm (0.3102 in) in thickness. NOTE: 2 types of stamp marks are used for parallel setting and for manufacturer identification. Available thickness of valve lifter: 27 sizes with range 7.88 to 8.40 mm (0.3102 to 0.3307 in) in steps of 0.02 mm (0.0008 in) (when manufactured at factory). see scheme 371
5. Install selected valve lifter.
6. Install camshaft.
7. Manually turn crankshaft pulley a few turns.
8. Make sure valve clearances for cold engine are within specifications by referring to the specified values.
9. After completing the repair, check valve clearances again with the specifications for warmed engine. Make sure the values are within specifications.

Scheme 20

Scheme 21

Scheme 22

1. Remove camshaft relating to valve oil seal to be removed. Refer to «CAMSHAFT»(ref-158850-S06127113932005020300000) .
2. Remove valve lifters. Refer to «CAMSHAFT»(ref-158850-S06127113932005020300000) .
3. Turn crankshaft until the cylinder requiring new oil seals is at TDC. This will prevent valve from dropping into cylinder.
4. Using valve spring compressor, attachment and adapter (SST), remove valve collet with magnet hand. Then remove valve spring and valve spring seat.
5. Remove valve oil seal using valve oil seal puller (SST).

Scheme 23

1. Apply engine oil on new valve oil seal joint and seal lip.
2. Using valve oil seal drift (SST), press fit valve seal to height "H" shown in figure. NOTE: Dimension "H": Height measured before valve spring seat installation Intake and exhaust : 14.3 - 14.9 mm (0.563 - 0.587 in)
3. Perform steps in the reverse order of removal for the following operations.

Scheme 24

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Scheme 27

1. Remove the following parts: Front engine undercover (With power tool). Drive belt. Refer to «DRIVE BELTS»(ref-158850-S01616040242005020300000) .
2. 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.
3. Remove front oil seal using a suitable tool.

Scheme 28

1. Apply engine oil on new front oil seal.
2. Using a suitable drift, press fit until the height of front oil seal is level with the mounting surface. Suitable drift: outer diameter 59 mm (2.32 in), inner diameter 49 mm (1.93 in). CAUTION: Press fit straight and avoid causing burrs or tilting oil seal.
3. Perform steps in the reverse order of removal for the following operations.

Scheme 29

Scheme 30

1. Remove oil pan (upper). Refer to «OIL PAN AND OIL STRAINER»(ref-158850-S11058956642005020300000) .
2. Remove transmission assembly. Refer to «REMOVAL & INSTALLATION»(ref-171001) .
3. Remove drive plate with power tool. Fix crankshaft with a ring gear stopper [SST: KV1011770 (J44716)], and remove mounting bolts. Loosen mounting bolts in diagonal order. CAUTION: Do not disassemble drive plate. Never place drive plate with signal plate facing down. When handling signal plate, take care not to damage or scratch it. Handle signal plate in a manner that prevents it from becoming magnetized.
4. Use a seal cutter (SST) to cut away liquid gasket and remove rear oil seal retainer.

Note. Rear oil seal and retainer form a single part and are handled as an assembly.

Scheme 31

1. Remove old liquid gasket on mating surface of cylinder block and oil pan using scraper.
2. Apply new engine oil to the oil and dust seal lips.
3. Apply liquid gasket to rear oil seal retainer with tube presser [SST: WS39930000 (-)] as shown in the figure. Use Genuine RTV Silicone Sealant or equivalent. Refer to RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS . Assembly should be done within 5 minutes after coating.
4. Install rear oil seal retainer to cylinder block.
5. Perform steps in the reverse order of removal for the following operations.

Scheme 32

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Scheme 35

1. Warm up engine thoroughly. Then, stop it.
2. Release fuel pressure. Refer to FUEL PRESSURE RELEASE .
3. Disconnect fuel pump fuse to avoid fuel injection during measurement.
4. Remove engine cover with power tool. Refer to «INTAKE MANIFOLD COLLECTOR»(ref-158850-S25261397642005020300000) .
5. Remove ignition coil and spark plug from each cylinder. Refer to «IGNITION COIL»(ref-158850-S36818243042005020300000) and «SPARK PLUG (PLATINUM-TIPPED TYPE)»(ref-158850-S41081597742005020300000) .
6. Connect engine tachometer (not required in use of CONSULT-II).
7. Install compression gauge with compression gauge adapter (commercial service tool) onto spark plug hole. Use compression gauge adapter 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.
8. With accelerator pedal fully depressed, turn ignition switch to "START" for cranking. When 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 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 spark plug hole of cylinder to re-check it for compression. If the added engine oil improves the compression, piston rings may be worn out or damaged. Check 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.
9. After inspection is completed, install removed parts.
10. Start engine, and confirm that engine runs smoothly.
11. Perform trouble diagnosis. If DTC appears, erase it. Refer to TROUBLE DIAGNOSIS .

Scheme 36

Scheme 37

1. Remove camshaft. Refer to «CAMSHAFT»(ref-158850-S06127113932005020300000) . NOTE: It is also possible to perform the following steps 2 and 3 just before removing camshaft.
2. Temporarily fit front suspension member to support engine. CAUTION: Temporary fitting means the status that engine is adequately stable though hoist is released from hanging. NOTE: At the time of the start of this procedure front suspension member is removed, and cylinder head is hanged by hoist with engine slinger installed.
3. Release hoist from hanging, then remove engine slinger.
4. Remove the following components and related parts: Fuel tube and fuel injector assembly. Refer to «FUEL INJECTOR AND FUEL TUBE»(ref-158850-S33821907532005020300000) . Intake manifold. Refer to «INTAKE MANIFOLD»(ref-158850-S39088650542005020300000) . Exhaust manifold. Refer to «EXHAUST MANIFOLD AND THREE WAY CATALYST»(ref-158850-S21791013992005020300000) . Water inlet and thermostat housing. Refer to WATER INLET AND THERMOSTAT ASSEMBLY . Water outlet and water piping. Refer to WATER OUTLET AND WATER PIPING .
5. Remove cylinder head loosening bolts with power tool in reverse order shown in the figure and using cylinder head bolt wrench (commercial service tool).
6. Remove cylinder head gaskets.

Scheme 38

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) : 0.11 mm (0.0043 in)
2. If reduction of outer diameter appears in a position other than d2, use it as d2 point.