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Thread: Rocker Arm Wear?

  1. #1
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    Rocker Arm Wear?

    So I was pulling the 2.8 rockers in preparation for mounting on my 3.0 and I found a bit of wear…
    A42FC5C6-F750-4F64-83E4-CEEDA56F5CE8.jpg

    Is this normal? If not, can anything be done to restore them?
    Early 81 5spd conversion- DMCH Ground Effects, Double Din, Custom Instrument Cluster, QA1 Suspension, 3.0 PRV with MS3

  2. #2
    President, DeLorean Industries
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    My VIN:    5646,5080, 5880, 10234, 3639, 2518, 10586, 1538

    Need to be replaced. Better to source used good condition factory ones. Stay away from the Chinese aftermarket units. Higher failure rate than stock.
    www.deloreanindustries.com Every Detail Matters

  3. #3
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    Quote Originally Posted by Delorean Industries View Post
    Need to be replaced. Better to source used good condition factory ones. Stay away from the Chinese aftermarket units. Higher failure rate than stock.
    Have any source on good used?

    I purchased a set of aftermarket yesterday, but I can still cancel. Paying Volvo $500+ for rockers isn’t exactly in my budget at the moment.
    Early 81 5spd conversion- DMCH Ground Effects, Double Din, Custom Instrument Cluster, QA1 Suspension, 3.0 PRV with MS3

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    Who sells aftermarket rockers? Didn't think there would be a demand

  5. #5
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    Quote Originally Posted by dmc4087 View Post
    Who sells aftermarket rockers? Didn't think there would be a demand
    Available from MTC and Febi for Volvo cars. Both aren’t really good brands at all, but it’s my only option. I called a Volvo dealer to check availability on the updated aluminum rockers p/n 271617, but I was unable to get a solid answer if they were available. And at $46 each, it would be quite steep for a full set.

    After removing the valve covers from the original 2.8, I found the rockers had already worn down and eaten the cam. The engine only had 24k miles, so it seems like the original rockers were pretty much trash to begin with…
    Early 81 5spd conversion- DMCH Ground Effects, Double Din, Custom Instrument Cluster, QA1 Suspension, 3.0 PRV with MS3

  6. #6
    Guy with a DeLorean Mark D's Avatar
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    Not to turn this into an engine oil thread, but is this the type of wear that happens due to lack of zinc (zddp) in modern oils?

    I've been running Valvoline VR-1 for that reason, which has higher zinc content. Extremely high levels are apparently bad for the catalytic converter, but I don't believe that VR-1 exceeds the amount of zinc used in conventional oils of the 80's era.

  7. #7
    Senior Member AugustneverEnds's Avatar
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    Quote Originally Posted by Mark D View Post
    Not to turn this into an engine oil thread, but is this the type of wear that happens due to lack of zinc (zddp) in modern oils?

    I've been running Valvoline VR-1 for that reason, which has higher zinc content. Extremely high levels are apparently bad for the catalytic converter, but I don't believe that VR-1 exceeds the amount of zinc used in conventional oils of the 80's era.
    Quick question and I'm done, what weight of VR-1 are you running? I'm also not trying to overtake this discussion with engine oil talk.
    Nick A.

    1988 BMW 325is
    1982 DeLorean DMC-12
    1989 Jaguar XJ6

  8. #8
    Guy with a DeLorean Mark D's Avatar
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  9. #9
    Senior Member AugustneverEnds's Avatar
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    Quote Originally Posted by Mark D View Post
    Super! Thank you much, alright back to rocker arms.
    Nick A.

    1988 BMW 325is
    1982 DeLorean DMC-12
    1989 Jaguar XJ6

  10. #10
    Senior Member Azar's Avatar
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    Quote Originally Posted by 81dmc View Post
    So I was pulling the 2.8 rockers in preparation for mounting on my 3.0 and I found a bit of wear…
    A42FC5C6-F750-4F64-83E4-CEEDA56F5CE8.jpg

    Is this normal? If not, can anything be done to restore them?
    Hi! Where exactly on the photo the wear is bad? The one touching the valve or the side sliding in the camshaft? Thanks!

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