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Oil pump leak woes


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Recently put a new V8 into the 4 door classic, which is going pretty well, other than a persistent oil leak from the oil pump base area which manifested as follows;

Engine fitted and no leaks for 200 miles

Slight weap from oil pump base area (looks like top near gasket)

Gasket replaced, leak stops for 50 miles

Leak re-appears so replaced the oil pump base with a spare and fitted new relief valve and spring along with new oil take off rubber gasket

Leak stops for 100 miles, has now re-appeared.

It's not a massive leak, but under motion it's enough that the oil is swept onto the exhaust causing unpleasant fumes so is very noticeable.

It didn't leak when the front cover was fitted to the old engine and the oil pump base has been replaced so the next stage in my eyes would be the replacement of the front cover as perhaps something was damaged when re-fitting.

Anyone experienced similar?

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