Altima GXE L4-2.4L (KA24DE) (1999)
3. Remove crankshaft pulley.
4. Remove front cover.
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Inspect for oil leakage at front oil seal.
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Replace seal if oil leak is present.
5. Remove the following parts:
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Oil pump drive spacer
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Lower timing chain tensioner
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Tension arm
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Lower timing chain guide
6. Remove lower timing chain and crankshaft sprocket.
INSPECTION
Check for cracks and excessive wear at roller links.
Replace chain if necessary.
INSTALLATION
CAUTION:
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After removing timing chain, do not turn crankshaft and camshaft separately, or valves will strike piston heads.
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When installing camshafts, chain tensioners, oil seals, or other sliding parts, lubricate contacting surfaces with new engine oil.
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Apply new engine oil to bolt threads and seat surfaces when installing cylinder head, camshaft sprockets, crankshaft pulley, and camshaft brackets.