1990 4.5 intake gaskets
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HT4100 4.1, 4.5, 4.9 Discussion, 1990 4.5 intake gaskets in Cadillac Engine Technical Discussion; Before I got sick last week with pneumonia, I started replacing the intake gaskets on a 4.5 . Here's a ...
  1. #1
    drewsdeville's Avatar
    drewsdeville is offline Cadillac Owners Master
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    1990 4.5 intake gaskets

    Before I got sick last week with pneumonia, I started replacing the intake gaskets on a 4.5 . Here's a picture of a 170,000 mile 4.5 with the intake manifold and valve covers removed.



    Unfortunately, it's been sitting in this state since Friday and the doc says I won't be good to go until later this week. I'll take more pictures when I'm able to wrap it up.

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  3. #2
    quins90lac's Avatar
    quins90lac is offline Cadillac Owners Enthusiast
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    Re: 1990 4.5 intake gaskets

    So what wer some of the symptoms that led you to replacing the intake gaskets?

  4. #3
    drewsdeville's Avatar
    drewsdeville is offline Cadillac Owners Master
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    Re: 1990 4.5 intake gaskets

    Rough running, stumbling, code E046 for right to left bank fuel imbalance, and oxy sensor showing lean running bank. Replaced ignition components a year ago, and installed a rebuilt set of bosch injectors over the summer, since I had some leakers. Ended up being a vacuum leak around #2 intake port.

  5. #4
    Sevillian273's Avatar
    Sevillian273 is offline Cadillac Owners Connoisseur
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    Re: 1990 4.5 intake gaskets

    Damn, looks pretty clean in there for 170K. I love these kinds of pics... hopefully I never see those parts of my own 4.5!

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