Nissan 12200-4W002 CRANKSHAFT Assembly

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The crankshaft should be magnafluxed to reveal hidden cracks, and this procedure can be done at an automotive machine shop.

After determining the main bearing oil clearance with Plastigage, carefully remove any traces of the Plastigage material from the main bearing journals and bearing faces.

The crankshaft endplay can be assessed by using a dial indicator or feeler gauges. A dial indicator should be mounted with the stem aligned with the crankshaft, making contact with one of the crank throws, and then zeroed out. The crankshaft should be gently pushed to the rear, and the dial indicator reading, which represents the endplay, should be observed. Feeler gauges can also be used by prying or pushing the crankshaft to the front and placing feeler gauges between the crankshaft and the front face of the crankshaft thrust bearing to measure the clearance.