Checked your A.I.R. system filter lately?
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HT4100 4.1, 4.5, 4.9 Discussion, Checked your A.I.R. system filter lately? in Cadillac Engine Technical Discussion; I just checked mine, and it literally crumbled in my hand. It's a soft foam filter with a metal grid ...
  1. #1
    noahsdad's Avatar
    noahsdad is offline Cadillac Owners Connoisseur
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    Checked your A.I.R. system filter lately?

    I just checked mine, and it literally crumbled in my hand. It's a soft foam filter with a metal grid inside to hold its shape. It's about the size of a pack of cigarettes, and has a light coating of oil on it. The idea is to trap particles from intake air before they reach the air pump. I have to believe that a clogged (or rotten) filter is a leading cause of pump failure.
    On the c-body DeVille, it's in a little black plastic box, next to the A/C accumulator. The lid just pops off. The AC Delco replacement is about $9.00

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    awadecki is offline Cadillac Owners Enthusiast
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    Re: Checked your A.I.R. system filter lately?

    Mine is in bad shape too. Where can I get one? Cadillac dealer?

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    noahsdad's Avatar
    noahsdad is offline Cadillac Owners Connoisseur
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    Re: Checked your A.I.R. system filter lately?

    Not sure if there's a cross reference to any other filter company, but it's available anywhere AC/Delco is sold. I'm fortunate to have a great little family owned parts store just down from my office that sells everything Delco ever made.

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    behind-bars is offline Cadillac Owners Connoisseur
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    Re: Checked your A.I.R. system filter lately?

    Does this apply to the 4.9 aswell? Or just the 4100?

  6. #5
    snydly402 is offline Cadillac Owners Member
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    Re: Checked your A.I.R. system filter lately?

    how about the 4.5, beacause my A.I.R. code trips every so ofter

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    awadecki is offline Cadillac Owners Enthusiast
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    Re: Checked your A.I.R. system filter lately?

    Not sure about the 4.5 (I know it has an AIR pump), but the 4.9 does not have one, or a filter.

  8. #7
    behind-bars is offline Cadillac Owners Connoisseur
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    Re: Checked your A.I.R. system filter lately?

    Quote Originally Posted by awadecki View Post
    Not sure about the 4.5 (I know it has an AIR pump), but the 4.9 does not have one, or a filter.

    Thanks for the reply, Thats what I figured since i had never seen or heard mention of it for the 4.9

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