Lost a couple lobes after oil change.

Discussion in 'Engine Topic' started by Craig69SSRS, Sep 19, 2019.

  1. CorkyE

    CorkyE Veteran Member Lifetime Gold Member

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    How so, catalytic converter?
     
  2. COPO

    COPO Veteran Member Lifetime Gold Member

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    No. We have no cats on these cars. It’ll do harm to the metal your trying to protect in the engine.
     
  3. CorkyE

    CorkyE Veteran Member Lifetime Gold Member

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    Was fishing with the question, but only reason I can see is that way too much zinc can sludge up an engine.
     
  4. COPO

    COPO Veteran Member Lifetime Gold Member

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    I dought sludge is the issue. With too much ZDDP you will see corrosive wear and the oil becoming acidic.
     
    76z28 likes this.
  5. 76z28

    76z28 Veteran Member

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    Copo is correct and if will also inhibit grain structure of certain metal contact areas
     
  6. roadrace2

    roadrace2 Veteran Member

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    Great discussion! (my 2 cents) :D
     
  7. 80NastyZ

    80NastyZ Veteran Member

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    To the OP :

    Was the oil filter bypass plugged ? Or was the OE valve still in place ?

    And I will second what 76z28 has stated , oil is not the issue with SFT or HFT cams going flat , there are many issues that contribute , oil is a very small part of it , especially in a BBC .

    At the 5K miles the OP said was on the engine , those lobes were "going" flat for almost all of that mileage , it didn't happen all of a sudden. That's a fact.

    TOM
     
  8. COPO

    COPO Veteran Member Lifetime Gold Member

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    If while breaking in a cam and your pushrods are not rotating, then the cam will be toast sooner or later.
     
  9. 80NastyZ

    80NastyZ Veteran Member

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    As well as the lifters ......

    I would wager a bet that those whom have "lost" flat tappet cams (and even those that have not) could not begin to tell anyone what the lifter bore clearance is .

    As these parts wear , holes that were once round , are not .

    TOM
     
  10. Bandit723

    Bandit723 Veteran Member

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    ^^^ Novel Idea.....
     

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