A/C Bypass Belt for 4.5L w/Calif Emissions
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HT4100 4.1, 4.5, 4.9 Discussion, A/C Bypass Belt for 4.5L w/Calif Emissions in Cadillac Engine Technical Discussion; I had a customer come to my store today looking for a A/C Bypass Belt for a 1990 Cadillac Deville ...
  1. #1
    matt98sport is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Jul 2008
    Posts
    1

    A/C Bypass Belt for 4.5L w/Calif Emissions

    I had a customer come to my store today looking for a A/C Bypass Belt for a 1990 Cadillac Deville with a 4.5L engine, and it has the Air Pump next to the A/C Compressor.
    I had found the diagram for the bypass for the vehicles without the Air Pump but this one is only a small help.
    On the diagram, it shows number 5 being the A/C But right next to this there is the air pump.
    What would be involved in bypassing this air pump? Any reprocussions such as SES light?

    Anybody here that can help? Maybe provide an actual belt length?
    Thanks in advance, Matt.

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  3. #2
    Edahall's Avatar
    Edahall is offline Cadillac Owners Enthusiast
    Automobile(s): 93 & 88 Allante, 88 Eldorado
    Join Date
    Jan 2004
    Posts
    779

    Re: A/C Bypass Belt for 4.5L w/Calif Emissions

    You might try looking up an A/C bypass belt for a 88/89 4.5L. The cars from these 2 years all had air pumps on them whether CA or Federal.

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