Engine Mechanical - VK45DE: Adjustments Infiniti M45 III

Tension Adjustment

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

Scheme 3

1. Remove air duct (inlet). Refer to " «AIR CLEANER AND AIR DUCT»(ref-239114-S06471612072006072700000) ".
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. Do not loosen the hexagonal part in center of drive belt auto tensioner pulley (Do not 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 4

1. Remove air duct (inlet). Refer to " «AIR CLEANER AND AIR DUCT»(ref-239114-S06471612072006072700000) ".
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-239114-S08056109682006072700000) ".
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

Note. Adjust valve clearance while engine is cold.

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Scheme 13

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 so as not to contact camshaft with adjusting shim.
4. Install lifter stopper [SST: 10115120 (J38972-2)] as follows: Except exhaust side of No. 7 and 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 8 cylinder; NOTE: Exhaust side of No. 7 and 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 eye.
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 with measured at center. Calculate thickness of new adjusting shim so valve clearance comes within specified values. 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) 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). Refer to " «AVAILABLE ADJUSTING SHIMS»(ref-239114-S38236315832006072700000) ". 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 8 cylinder; Perform same procedure for removal, place camshaft pliers (SST). Remove lifter stopper (SST). Remove camshaft pliers. Exhaust side of No. 7 and 8 cylinder. Rotate crankshaft slowly 180 degrees clockwise. then remove lifter stopper.
10. Manually turn crankshaft pulley a few turns.
11. Make sure that the valve clearance is within the standard. Refer to " «INSPECTION»(ref-239114-S25452994132006072700000) ".
12. Install all removed parts in the reverse order of removal. Refer to " «INSTALLATION»(ref-239114-S16398862062006072700000) ".
13. Warm up the engine, and check for unusual noise and vibration.

Scheme 14

1. Remove engine assembly from vehicle. Refer to " «ENGINE ASSEMBLY»(ref-239114-S13076625432006072700000) ".
2. Remove camshaft relating to valve oil seal to be removed. Refer to " «CAMSHAFT»(ref-239114-S42708431372006072700000) ".
3. Remove adjusting shims and valve lifters. Refer to " «CAMSHAFT»(ref-239114-S42708431372006072700000) ". 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 (with valve spring seat). 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 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.

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1. Remove the following parts: Front engine undercover (power tool) Radiator; Refer to " «RADIATOR»(ref-239115-S03757741242006072600000) ". Drive belt; Refer to " «DRIVE BELTS»(ref-239114-S11427993582006072700000) ". Rear plate cover; Refer to " «OIL PAN AND OIL STRAINER»(ref-239114-S25579830522006072700000) ".
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: 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.
3. Remove front oil seal using suitable tool. CAUTION: Be careful not to damage front cover and oil pump drive spacer.

Scheme 20

1. Apply new 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 front oil seal drift, press fit until the height of front oil seal is level with the mounting surface. Front oil seal drift Outer diameter: 56 mm (2.20 in) Inner diameter: 49 mm (1.93 in) Make sure the garter spring is in position and seal lips not inverted. 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.