1976 500 rebuild pics part 2 - Page 2
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500, 472, 425, 368 Discussion, 1976 500 rebuild pics part 2 in Cadillac Engine Technical Discussion; Good advise. I will know where I stand once I get the engine back in and see how the old ...
  1. #16
    davidp1561 is offline Cadillac Owners Member
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    Re: 1976 500 rebuild pics part 2

    Good advise. I will know where I stand once I get the engine back in and see how the old ECU works. If need be I will have it repaired/replaced at that time. My intent is to keep things basically stock as much as possible.

  2. #17
    drmenard is offline Cadillac Owners Enthusiast
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    Re: 1976 500 rebuild pics part 2

    If you are having your engine worked on and have time, I would send the ECM to Bruce Roe and have him check it out.. I don't think there is anybody who knows more than him on these computers.. He has posts on the forum , you can send him message on what to do... That way you know its good and could find a spare if you want.

  3. #18
    The Ape Man's Avatar
    The Ape Man is offline Cadillac Owners Connoisseur
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    Re: 1976 500 rebuild pics part 2

    Quote Originally Posted by caddydaddy View Post
    I will say that my old EFI 500 was the smoothest idling engine I've ever owned! But, like you said, parts are getting hard to find. Lots of them were converted to carburetor for that reason.
    I had a doped up 425 F.I. system on a 500 engine back in 1993. The 500 was high compression. I was able to turn the idle down to 300 RPM in gear and it didn't come close to missing a beat.

    That whole mess was fitted into an '82 Trans Am. First used a 200-4R trans with a home made lockup control. My transmission guy at the time said it would hold up. Guess the rest.

    That car got 24 MPG on the highway and I never once launched it hard from a standstill for fear of ripping the OEM rear axle apart.

    Sure surprised a few people who thought I had a crossfire 305
    70eldo likes this.

  4. #19
    davidp1561 is offline Cadillac Owners Member
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    Re: 1976 500 rebuild pics part 2

    sounds really cool

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    Met with my engine builder yesterday. He has my engine apart and everything through the parts washer - so far no surprises so its going pretty smooth. I asked him the cause of the bent push rods as seen in the attached pics and he said there was a failure of the - wait for it - factory timing set (when previous owner had it) and that was that. Still amazed the engine would even run. Another couple of weeks and I will have the engine back in the car.

  5. #20
    drmenard is offline Cadillac Owners Enthusiast
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    Re: 1976 500 rebuild pics part 2

    May I suggest that you don't use a cheap timing set. I would only use a sprocket - roller chain type .. The cheapest I have seen them is $80 and as much as a $150.. The cheap replacments that sell for $30-$40 are bad.. The Cloyes brand are very good.
    70eldo likes this.

  6. #21
    davidp1561 is offline Cadillac Owners Member
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    Re: 1976 500 rebuild pics part 2

    That is what I am installing this go round.

  7. #22
    deVille33 is offline Cadillac Owners Connoisseur
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    Re: 1976 500 rebuild pics part 2

    That "problem" could have been avoided if the engine had been properly indexed and checked after assembly.

  8. #23
    MRneatfreak- is offline Cadillac Owners Fanatic
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    You probably already know this, but avoid the continuous high revs when you first are trying to start it. There are going to be some start, and stalls due to fuel starvation after sitting, etc.. I had an olds 307 rebuilt years ago, and i reassembled the engine heads on the short block to save money. Long story short, after installing in the car, i couldn't get it to stay running for more than 30 secs with high revs. I was under the gun after the parking code enforcement tow my car from my back driveway and the car was outside and it was snowing (i was too hurried) It turned out the stock aluminum intake was cracked. Remedied that with a cast iron intake. But the damage was done to the engine due to not having a proper break-in at mild and ranging speeds. It burned and smoked oil for the next 10 years.

  9. #24
    The Ape Man's Avatar
    The Ape Man is offline Cadillac Owners Connoisseur
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    Re: 1976 500 rebuild pics part 2

    If the pushrods were bent by a timing set problem there would also be bent valves.

    More likely the valves were stuck in their guides from sitting.

  10. #25
    davidp1561 is offline Cadillac Owners Member
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    Re: 1976 500 rebuild pics part 2

    Got the rebuilt motor from the machine shop this past weekend. Got the rebuilt transmission back last month. Major difference already as they both look lots better............. Can't wait to get them installed.

    Attachment 182945

  11. #26
    davidp1561 is offline Cadillac Owners Member
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    Re: 1976 500 rebuild pics part 2


  12. #27
    davidp1561 is offline Cadillac Owners Member
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    Re: 1976 500 rebuild pics part 2


  13. #28
    caddydaddy's Avatar
    caddydaddy is offline Cadillac Owners Connoisseur
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    Re: 1976 500 rebuild pics part 2

    Looks great! Is that the 425 color?

  14. #29
    davidp1561 is offline Cadillac Owners Member
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    Re: 1976 500 rebuild pics part 2

    It was Duplicolor engine enamel from the local parts store. Closest color I could find to the OE spec....

    ----------

    caddydaddy just noticed that your birthdate is the same as my weeding anniversary - cool

  15. #30
    davidp1561 is offline Cadillac Owners Member
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    Re: 1976 500 rebuild pics part 2

    70eldo likes this.

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