Sentra GXE L4-1.8L (QG18DE) (2000)
Valve Clearance: Testing and Inspection
CHECKING
Check valve clearance while engine is warm and not running.
1. Remove rocker cover.
2. Remove all spark plugs.
3. Set No. 1 cylinder at TDC on its compression stroke.
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Align pointer with TDC mark on crankshaft pulley.
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Check that valve lifters on No. 1 cylinder are loose and valve lifters on No. 4 are tight.
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If not, turn crankshaft one revolution (360°) and align as described above.
4. Check only those valves shown in the figure.
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Using a feeler gauge, measure clearance between valve lifter and camshaft.
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Record any valve clearance measurements which are out of specification. They will be used later to determine the required replacement
adjusting shim.
Valve clearance for checking (Hot):
Intake: 0.21 - 0.47 mm (0.008 - 0.019 inch)
Exhaust: 0.30 - 0.56 mm (0.012 - 0.022 inch)
5. Turn crankshaft one revolution (360°) and align mark on crankshaft pulley with pointer.
6. Check only those valves shown in the figure.
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Use the same procedure as mentioned in step 4.
7. If all valve clearances are within specification, install the following parts: