Engine Mechanical (VK45DE): Adjustments Infiniti M45 III рестайлинг

Tension Adjustment

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

Scheme 7

1. Remove air duct (inlet). Refer to «AIR CLEANER AND AIR DUCT»(ref-356271-S05926562162010021300000) .
2. 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. Never loosen the hexagonal part in center of drive belt auto tensioner pulley (Never turn it clockwise). If turned clockwise, the complete drive belt auto tensioner must be replaced as a unit, including the pulley.
3. Under the above condition, insert a metallic 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.
4. Remove alternator, water pump and A/C compressor belt.

Scheme 8

1. Remove air duct (inlet). Refer to «AIR CLEANER AND AIR DUCT»(ref-356271-S05926562162010021300000) .
2. Remove 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-356271-S23610106412010021300000) ".
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 metallic 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

Perform adjustment depending on selected head thickness of valve lifter.

Scheme 9

Scheme 10

1. Measure the valve clearance. Refer to " «VALVE CLEARANCE»(ref-356271-S10631452352010021300000) ".
2. Remove camshaft. Refer to " «REMOVAL AND INSTALLATION»(ref-356271-S24582244342010021300000) ".
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.
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. STAMP MARK THICKNESS CHART Unit: mm (in) Stamp mark Thickness 788 7.88 (0.3102) 790 7.90 (0.3110) . . . . 840 8.40 (0.3307) NOTE: 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-356271-S19368264422010021300000) ".
6. Install selected valve lifter.
7. Install camshaft. Refer to " «REMOVAL AND INSTALLATION»(ref-356271-S24582244342010021300000) ".
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 " «VALVE CLEARANCE»(ref-356271-S10631452352010021300000) ".
10. Install all removal parts in the reverse order of removal. Refer to " «REMOVAL AND INSTALLATION»(ref-356271-S24582244342010021300000) ".
11. Warm up the engine, and check for unusual noise and vibration.

Scheme 11

Scheme 12

1. Remove engine assembly from vehicle. Refer to " «2WD : COMPONENT»(ref-356271-S03159714792010021300000) " (2WD models) or " «AWD : COMPONENT»(ref-356271-S35286896862010021300000) " (AWD models).
2. Remove camshaft relating to valve oil seal to be removed. Refer to «CAMSHAFT»(ref-356271-S04676191362010021300000) .
3. Remove valve lifters. Refer to «CAMSHAFT»(ref-356271-S04676191362010021300000) . 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 (SST), attachment (SST), 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 (with valve spring seat). CAUTION: Never remove valve spring seat from valve spring.
7. Remove valve oil seal using valve oil seal puller (SST).

Scheme 13

1. Apply new 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.

Scheme 14

Scheme 15

1. Remove the following parts: Front engine undercover (power tool) Radiator: Refer to «RADIATOR»(ref-356272-S23734032422010021300000) . Drive belts: Refer to «DRIVE BELTS»(ref-356271-S33634597102010021300000) . Rear plate cover: Refer to «OIL PAN AND OIL STRAINER»(ref-356271-S15531296612010021300000) .
2. Remove crankshaft pulley as follows: Set ring gear stopper (SST). Loosen crankshaft pulley bolt, and then pull crankshaft pulley with both hands to remove it. CAUTION: Never remove crankshaft pulley bolt. Keep loosened crankshaft pulley bolt in place to protect removed crankshaft pulley from dropping. Never remove balance weight (inner hexagon bolt) at the front of crankshaft pulley.
3. Remove front oil seal using suitable tool. CAUTION: Be careful not to damage front cover and oil pump drive spacer.