1954 235 engine oil leak - NCRS Discussion Boards

1954 235 engine oil leak

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  • John R.
    Infrequent User
    • July 5, 2022
    • 1

    1954 235 engine oil leak

    My '54 Corvette recently had the engine rebuilt by Jasper Engines and it was leaking oil after I drove it 7 miles home. Finally narrowed it down to the main seal. The transmission was pulled and the rope seal replaced with a neoprene seal. After putting it back together it ran fine with no leaks on the rack including revving the engine manually. Two laps around the block and it's leaking again from the main seal.

    Anyone have any thoughts on why it would only leak while driving?

    Thanks.
  • Chris S.
    Extremely Frequent Poster
    • January 1, 2000
    • 1064

    #2
    Re: 1954 235 engine oil leak

    The 235 crank is aligned differently than most engines - the main bearings use shims to align the crank in the block - the real only way to stop a 235 from leaking is to have the rear main machined for a LS style 1 pc rear main seal - I do this for ALL my customers engines - ALL - rope seals and rubber seals fail and leak - I know its a pain - but I send all my blocks to a machine shop - machine the rear main cap - Sorry for the leaks - Chris Sherman
    1954 Corvette #3803 - Top Flight 2012, Bloomington Gold 2012,
    Triple Diamond Award 2012, Gold Concourse Award 2012, Regional and National Top Flight 2014
    1954 Corvette #3666 - "The Blue Devil" - Pennant Blue - restoration started
    1957 Corvette - FI 3 sp - Black and Silver

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