Engine Mechanical: Adjustments Infiniti M35 III рестайлинг

Tension Adjustment

Belt tension is not necessary, as it is automatically adjusted by drive belt auto-tensioner.

Scheme 7

1. Remove front engine undercover with power tool.
2. While securely holding the square hole (A) in pulley center of auto tensioner (1) with a spinner handle, move spinner handle in the direction of arrow (loosening direction of drive belt). CAUTION: Avoid placing hand in a location where pinching may occur if the holding tool accidentally comes off.
3. Under the above condition, insert a metallic bar of approximately 6 mm (0.24 in) diameter [hexagonal wrench (C) shown as example in the figure] through the holding boss (B) to lock auto-tensioner pulley arm.
4. Remove drive belt.

ADJUSTMENT

1. Perform adjustment depending on selected head thickness of valve lifter.

Scheme 8

Scheme 9

1. Measure the valve clearance. Refer to " «INSPECTION»(ref-356257-S18327564322010021300000) ".
2. Remove camshaft. Refer to " «COMPONENT»(ref-356257-S42392285082010021300000) ".
3. Remove valve lifters at the locations that are out of the standard.
4. Measure the center thickness of removed valve lifters with a micrometer (A).
5. Use the equation below to calculate valve lifter thickness for replacement. Valve lifter thickness calculation: t = t1+ (C1 - C2) 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) Thickness of new valve lifter can be identified by stamp marks on the reverse side (inside the cylinder). Stamp mark 788 indicates 7.88 mm (0.3102 in) in thickness. 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). Refer to " «STANDARD AND LIMIT»(ref-356257-S26473803892010021300000) ".
6. Install selected valve lifter.
7. Install camshaft. Refer to " «COMPONENT»(ref-356257-S42392285082010021300000) ".
8. Manually turn crankshaft pulley a few turns.
9. Check that the valve clearances for cold engine are within the specifications by referring to the specified values. Refer to " «INSPECTION»(ref-356257-S18327564322010021300000) ".
10. Install all removal parts in the reverse order of removal. Refer to " «COMPONENT»(ref-356257-S42392285082010021300000) ".
11. Warm up the engine, and check for unusual noise and vibration.

Scheme 10

Scheme 11

1. Remove camshaft relating to valve oil seal to be removed. Refer to «CAMSHAFT»(ref-356257-S39971557482010021300000) .
2. Remove valve lifters. Refer to «CAMSHAFT»(ref-356257-S39971557482010021300000) .
3. Turn crankshaft until the cylinder requiring new oil seals is at TDC. This will prevent valve from dropping into cylinder.
4. Remove valve collet. Compress valve spring with valve spring compressor [SST: KV10116200 (J26336-A)] (A), attachment [SST: KV10115900 (J26336-20)] (C), adapter [SST: KV10109220 (-)] (B). Remove valve collet with magnet hand. CAUTION: When working, take care not to damage valve lifter holes.
5. Remove valve spring retainer, valve spring and valve spring seat.
6. Remove valve oil seal using valve oil seal puller [SST: KV10107902 (J38959)] (A).

Scheme 12

1. Apply engine oil on new valve oil seal joint and seal lip.
2. Using valve oil seal drift [SST: KV10115600 (J38958)] (A), press fit valve oil seal to height (b) shown in the figure. NOTE: Dimension: Height measured before valve spring seat installation Intake and exhaust : 14.3 - 14.9 mm (0.563 - 0.587 in)
3. Install in the reverse order of removal after this step.

Scheme 13

1. Remove the following parts: Front engine undercover Drive belt: Refer to «DRIVE BELT»(ref-356257-S42868371622010021300000) . Radiator cooling fan assembly: Refer to " «COMPONENT»(ref-356258-S25378494482010021300000) ". Crankshaft pulley: Refer to «TIMING CHAIN»(ref-356257-S39777016232010021300000) .
2. Remove front oil seal using suitable tool. CAUTION: Be careful not to damage front timing chain case and crankshaft.

Scheme 14

1. Apply engine oil to both oil seal lip and dust seal lip of new front oil seal.
2. Install front oil seal. Install front oil seal so that each seal lip is oriented as shown in the figure. Using suitable drift, press-fit until the height of front oil seal is level with the mounting surface. Suitable drift: outer diameter 60 mm (2.36 in), inner diameter 50 mm (1.97 in). CAUTION: Be careful not to damage front timing chain case and crankshaft. Press-fit straight and avoid causing burrs or tilting oil seal.
3. Install in the reverse order of removal after this step.

Scheme 15

1. Remove transmission assembly. Refer to " «REMOVAL AND INSTALLATION (2WD MODELS)»(ref-356265-S07173547982010021300000) " or " «REMOVAL AND INSTALLATION (AWD MODELS)»(ref-356265-S18979644372010021300000) ", " «EXPLODED VIEW»(ref-356265-S28746211002010021300000) ".
2. Remove drive plate. Refer to «CYLINDER BLOCK»(ref-356257-S11268150902010021300000) .
3. Remove rear oil seal with a suitable tool. CAUTION: Be careful not to damage crankshaft and cylinder block.

Scheme 16

Scheme 17

Scheme 18

1. Apply new engine oil to new rear oil seal joint surface and seal lip.
2. Install rear oil seal so that each seal lip is oriented as shown in the figure. Press in rear oil seal (1) to the position as shown in the figure. Using suitable drift (A), press-fit until the height of front oil seal is level with the mounting surface. Suitable drift: outer diameter 100 mm (3.94 in), inner diameter 85 mm (3.35 in). CAUTION: Be careful not to damage crankshaft and cylinder block. Press-fit oil seal straight to avoid causing burrs or tilting.
3. Install in the reverse order of removal after this step.

Scheme 19

Scheme 20

Scheme 21

1. Warm up engine thoroughly. Then, stop it.
2. Release fuel pressure. Refer to " «INSPECTION»(ref-356259-S29114663682010021300000) ".
3. Disconnect fuel pump fuse (1) from IPDM E/R (2) to avoid fuel injection during measurement.
4. Remove engine cover with power tool. Refer to " «REMOVAL AND INSTALLATION»(ref-356257-S14982614312010021300000) ".
5. Remove ignition coil and spark plug from each cylinder. Refer to «IGNITION COIL»(ref-356257-S33776163312010021300000) and «SPARK PLUG (IRIDIUM-TIPPED TYPE)»(ref-356257-S34050864512010021300000) .
6. Connect engine tachometer (not required in use of CONSULT-III).
7. Install compression tester (commercial service tool) with adapter onto spark plug hole. Use the 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 the gauge pointer stabilizes, read the compression pressure and engine rpm. Perform these steps to check each cylinder. Compression pressure: COMPRESSION PRESSURE SPECIFICATION Unit: kPa (kg/cm 2 , psi)/rpm Standard Minimum Differential limit between cylinders 1,275 (13.0, 185)/300 981 (10.0, 142)/300 98 (1.0, 14)/300 CAUTION: Always use a fully charged 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 recheck 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, cylinder head gaskets are leaking. In such a case, replace cylinder head gaskets.
9. After inspection is completed, install removed parts.
10. Start engine, and check that engine runs smoothly.
11. Perform trouble diagnosis. If DTC appears, erase it. Refer to " «DESCRIPTION»(ref-356259-S19577477582010021300000) ".

Scheme 22

1. Refer to " «COMPONENT»(ref-356247-S34736249572010021300000) " for symbols in the figure.

Scheme 23

1. Remove engine assembly from vehicle, and separate front suspension member and transmission from engine. Refer to " «2WD : COMPONENT»(ref-356257-S33024026232010021300000) " (2WD models) or " «AWD : COMPONENT»(ref-356257-S19391482952010021300000) " (AWD models).
2. Remove the following parts: Fuel tube and fuel injector assembly: Refer to «FUEL INJECTOR AND FUEL TUBE»(ref-356257-S08523834072010021300000) . Intake manifold: Refer to «INTAKE MANIFOLD»(ref-356257-S42321757422010021300000) . Exhaust manifold: Refer to «EXHAUST MANIFOLD AND THREE WAY CATALYST»(ref-356257-S23113677062010021300000) . Water inlet and thermostat assembly: Refer to " «COMPONENT»(ref-356258-S10254628312010021300000) ". Water outlet and water pipe: Refer to " «COMPONENT»(ref-356258-S27884151702010021300000) ". Front and rear timing chain case: Refer to «REMOVAL AND INSTALLATION»(ref-356257-S31155765462010021300000) .
3. Remove camshaft (INT and EXH). Refer to «CAMSHAFT»(ref-356257-S39971557482010021300000) .
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 24

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