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bmw e46 M3 tappet adjustment

Today we are doing an inspection II service on Mikes lovely low mileage M3.

This service includes checking and adjusting the tappets.

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The clearances must be checked with a stone cold engine. Mike left his car overnight for us to do the following morning.

So lets remove the rocker cover.

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Open up the box of replacement tappets. The existing clearances need checking and if they’re out of spec then the tappet must be removed and measured with a micrometer.

Checking the clearances will require the camshaft lobe of the cylinders pointing up.

Fit the correct size replacement tappet to adjust the clearance.

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