Nissan 13231-7S006 Lifter-Valve

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Measure the height of each camshaft lobe and check for runout using a dial indicator.

Mark the positions of the camshaft bearing caps with an "I" for intake or "E" for exhaust, and indicate the front of the engine.

Begin by detaching the cable from the negative terminal of the battery, then remove the valve covers.

Secure the lifters by raising them slightly and wrapping a rubber band around each one to prevent them from falling out of the guides. If a lifter falls out, return it to its original location immediately.

Subtract the outside diameter of each lifter from the inside diameter of the lifter bore and compare the difference to the clearance specified in this Chapter. If both the lifter and the bore are within acceptable limits, this measurement should fall within tolerance. However, if new parts such as lifters or the lifter guide assembly (SOHC) or the cylinder head (DOHC) have been changed, this clearance may no longer fall within the specified limit.