Vacuum pump bracket

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Vacuum pump bracket

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Cadillac >> General Technical Section >> Engine Specific >> Aluminum Block V8s >> Vacuum pump bracket

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Vacuum pump bracket - 9/24/2007 4:39:54 AM

devilleish

Posts: 20
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Joined: 8/18/2007
Status: offline

My '84 Sedan DeVille's HT4100 keeps breaking the bracket that mounts the vacuum pump to the left head. Is there a fix besides welding the whole mess back together? Today's repair will involve a couple of gussets to try to prevent this from happening again, but in case it breaks again, I was wondering if Cadillac ever updated the design. I have seen a TSB about the bracket coming loose from the head (it has happened to me twice). Has anyone else experienced breakage? What was your fix?

Post #: 1

RE: Vacuum pump bracket - 9/24/2007 10:34:50 PM

brougham1

Posts: 385
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Joined: 7/5/2006
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Hey Devil: Could this possible be related to bad motor mounts, not sure in this case just guessing.

(in reply to devilleish)

Post #: 2

RE: Vacuum pump bracket - 9/25/2007 4:24:32 AM

devilleish

Posts: 20
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Joined: 8/18/2007
Status: offline

I got it figgered out yesterday. The p/s pump had come loose from the block and was pulling on the bracket, which, as it turns out, was mounted to the pump behind the pulley, as well as to the head. Luckily, I had a spare vacuum pump bracket. The gas mileage has already improved with the vacuum pump now properly mounted, and the car smokes less from the tailpipes as well. I can't help but wonder how long it's been like that, since I put on a new water pump in May 2003, and didn't notice any loose p/s pump then.

(in reply to brougham1)

Post #: 3