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CHECKING Nissan Maxima A35

Engine Mechanical 8 illustrations ~391 words

CHECKING

  1. Perform inspection as follows after removal, installation or replacement of camshaft or valve related parts, or if there are unusual engine conditions regarding valve clearance.

Check valve clearance while engine is cold and not running.

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  1. Remove the air duct with air cleaner case, collectors, hoses, wires, harnesses, and connectors. Refer to " «REMOVAL AND INSTALLATION»(ref-388044-S37478427172011022800000) ".
  2. Remove the intake manifold collectors. Refer to " «REMOVAL AND INSTALLATION»(ref-388044-S24115967902011022800000) ".
  3. Remove the ignition coils and spark plugs. Refer to " «EXPLODED VIEW»(ref-388044-S24503572912011022800000) ".
  4. Remove the rocker covers. Refer to " «EXPLODED VIEW»(ref-388044-S18248949352011022800000) ".
  5. Set No. 1 cylinder at TDC on its compression stroke. Align pointer with TDC mark on crankshaft pulley. Check that the valve lifters on No. 1 cylinder are loose and valve lifters on No. 4 are tight. If not, turn the crankshaft one full revolution (360°) and align as shown in illustration.
  6. Check only the valves as shown in illustration. INTAKE AND EXHAUST VALVES POSITION CHART Crank Position Valve No. 1 Valve No. 2 Valve No. 3 Valve No. 6 No. 1 TDC Intake Exhaust Exhaust Intake Using a feeler gauge, measure the clearance between the valve lifter and camshaft. Record any valve clearance measurements which are out of specification. They will be used later to determine the required replacement lifter size. Valve Clearance for Checking (cold) Intake : 0.26 - 0.34 mm (0.010 - 0.013 in) Exhaust : 0.29 - 0.37 mm (0.011 - 0.015 in)
  7. Turn crankshaft 240°.
  8. Set No. 3 cylinder at TDC on its compression stroke.
  9. Check only those valves as shown in illustration. INTAKE AND EXHAUST VALVES POSITION CHART Crank Position Valve No. 2 Valve No. 3 Valve No. 4 Valve No. 5 No. 3 TDC Intake Intake Exhaust Exhaust
  10. Turn the crankshaft 240° and align as above.
  11. Set No. 5 cylinder at TDC on its compression stroke.
  12. Check only those valves as shown in illustration. INTAKE AND EXHAUST VALVES POSITION CHART Crank Position Valve No. 1 Valve No. 4 Valve No. 5 Valve No. 6 No. 5 TDC Exhaust Intake Intake Exhaust
  13. If all valve clearances are within specification, install the following components. If the valve clearances are out of specification, adjust the valve clearances. Intake manifold collectors Rocker covers All spark plugs All ignition coils