E46 M3 Oil Loss S54 Teardown

We had an E46 M3 Track car make its way to the shop after losing the majority of its engine oil via a cooler line leak. The engine was pulled immediately as suggested by the  knocking bottom end.

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Top end looks excellent at 72K miles. The head will be pressure tested and skimmed while it’s off, and an order for all the Beisan VANOS bits has been placed.

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Bottom end was unsurprising. Rods 2,3,4, and 6 spun their bearings. Replacement factory rods, a reconditioned crank, and new bearings will be installed.

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