Sentra SE-R Spec V L4-2.5L (QR25DE) (2002)
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c. Secure hexagonal part of the camshaft with a wrench and loosen the camshaft sprocket mounting bolt and remove the camshaft sprocket for
both camshafts.
CAUTION: Do not rotate the crankshaft or camshafts while the timing chain is removed. It can cause damage to the valve and piston.
19. Remove the chain slack guide, tension guide, timing chain, and oil pump drive spacer.
20. Remove the timing chain tensioner for the balancer unit with the following procedure:
a. Lift the tensioner lever up, and release the ratchet claw.
b. Push tensioner sleeve in, and hold it.
c. Matching the hole on lever with the one on body, insert a stopper pin to secure tensioner sleeve.
d. Remove the timing chain tensioner for the balancer unit.
21. Remove timing chain for balancer unit and crankshaft sprocket.
22. Loosen mounting bolts in reverse order shown in the figure, and remove balancer unit.
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Use Torx socket (size E14)
CAUTION: Do not disassemble balancer unit.
INSPECTION AFTER REMOVAL
Timing Chain
Check the timing chain for cracks or serious wear. If a defect is detected, replace it.
