Timing adjustment '72 472cui
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500, 472, 425, 368 Discussion, Timing adjustment '72 472cui in Cadillac Engine Technical Discussion; What is the correct timing degree for my '72 Coupe DeVille?I believe that it should be set at 8 degrees ...
  1. #1
    Coolrader is offline Cadillac Owners Member
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    Timing adjustment '72 472cui

    What is the correct timing degree for my '72 Coupe DeVille?I believe that it should be set at 8 degrees BTC, is this correct, with a plugged vacuum advance?I know this has probably been asked hundreds of times before, but anyhow....
    I'll set the dwell to 30 deg, right now it's got to be set at 37 deg. to run ok but thats probably because the timing is off, right?It's also a bit heavy on the starter so I suspect that the timing is a bit "high".
    I've borrowed a strobe from a friend and will check it out tomorrow.
    Thankful for any tips.

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    caddydaddy's Avatar
    caddydaddy is offline Cadillac Owners Connoisseur
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    Re: Timing adjustment '72 472cui

    It should be on the emmissions label. It is 8 degrees before, with the vacuum advance plugged and the RPMs at around 1200.

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    Coolrader is offline Cadillac Owners Member
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    Re: Timing adjustment '72 472cui

    The emissions label is missing on my car...

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    caddydaddy's Avatar
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    Re: Timing adjustment '72 472cui

    Contact USA Parts Supply for a new one!

    USA Parts Supply

  6. #5
    Coolrader is offline Cadillac Owners Member
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    Re: Timing adjustment '72 472cui

    I've adjusted the timing according to the instructions in my shop manual, but I can't set it to 8* BTC, if I try to do so it gets very rough and stalls.It seems to run at its best when i set it so that the marker is about 3/4" or so to the right(the cars right) of the marker plate.Then I can set the dwell to the specific 30*, but it still turns over with some resistance when it's hot, like the timing is off.If I disconnect the coil and run the starter the engine spins easily, so it is'nt a mechanical problem.I also cant seem to get it a 100% steady at idle or low-revs.Any ideas or suggestions why the timing markers are off?I have changed all the serviceable things in the ignition system.Compression is fine(has only done about 76000 miles)
    Thanks.

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