Timing Issue
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  • 1 Post By carnut
HT4100 4.1, 4.5, 4.9 Discussion, Timing Issue in Cadillac Engine Discussion; On an 85 seville the timing tab at the crank pulley what are the space values an where is 0 ...
  1. #1
    omston is offline Cadillac Owners Fanatic
    Automobile(s): 1985 Seville
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    Timing Issue

    On an 85 seville the timing tab at the crank pulley what are the space values an where is 0 located i cant read mine. Please help if you know.


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  3. #2
    carnut is offline Cadillac Owners Master
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    Re: Timing Issue

    If you haven't unplugged the green connector by the distributor You wont see the mark. They're in 2 degree increments. You might apply some yellow chalk or white-out on the marker. Should be 10 degrees but they run better at 12.

  4. #3
    warnereg is offline Cadillac Owners Member
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    Re: Timing Issue

    I would keep it at 10 if you want to run stock. Those high paid engineers set the timing at 10 degrees btdc for a reason. It seems to be a controversial subject, but I will never run my timing anything other than stock spec. I have not seen any solid proof of timing changes making this motor run "better".

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  6. #4
    carnut is offline Cadillac Owners Master
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    Re: Timing Issue

    Quote Originally Posted by warnereg View Post
    I would keep it at 10 if you want to run stock. Those high paid engineers set the timing at 10 degrees btdc for a reason. It seems to be a controversial subject, but I will never run my timing anything other than stock spec. I have not seen any solid proof of timing changes making this motor run "better".
    Really! Factory Timing specs are a compromise at best. Quality of gas, altitude, air density all affect optimum timing on any engine. There are no "timing police" Trust me 2 degrees above spec. will allow the engine to run better, by that I mean quicker off idle response and if closely monitored, 1 to 2 MPG improvement. BUT.... we haven't heard back from the Op so lets wait and see whats up.
    delerium75 likes this.

  7. #5
    omston is offline Cadillac Owners Fanatic
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    Re: Timing Issue

    Where exactly is this green wire? Is it connected to the distributor? Or to the multi point connector on the fire wall?

  8. #6
    carnut is offline Cadillac Owners Master
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    Re: Timing Issue

    Its not a green wire, its a green connector just beside the distributor. Its mentioned on the decal on your radiator support.

  9. #7
    omston is offline Cadillac Owners Fanatic
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    Re: Timing Issue

    My decal on the shrouds all washed out couldn't read it. I changed intake gaskets and removed distributor and i just don't recall seeing it but ill look for it. It starts right up and runs ok so it must not be to far off i marked distributor location before i pulled it.

  10. #8
    omston is offline Cadillac Owners Fanatic
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    Re: Timing Issue

    Are you talking about the connector out of the base of the distributor its 4 or 5 pins?

  11. #9
    carnut is offline Cadillac Owners Master
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    Re: Timing Issue

    Its a one wire connector. GREEN !

  12. #10
    omston is offline Cadillac Owners Fanatic
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    Re: Timing Issue

    Thanks i found it i wonder if they could have made it harder to reach? I guess if your eight feet tall its easy. My timing tabs in 4 deg increments not two.

  13. #11
    omston is offline Cadillac Owners Fanatic
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    Re: Timing Issue

    Your right its 2 deg increments i didnt see the small hash marks.

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