Exhaust Manifold To DP Flange? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 10-29-2007, 11:53 PM   #1
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Default Exhaust Manifold To DP Flange?

Ok I am at my wits end on this exhaust leak that has been there since day one . So here are the pictures of the flanges. Yes I know one of the studs is in backwards but it didn't matter when it was the other way. The EM'* are welded and the donught gasket in ther eis straight from GM. The problem I am having is that the flanges at the top are hitting when the motor is torqued which in turn opens at the bottom. I have had five exhaust shops work on it in the last year and none of them have fixed it yet! The last one was the shop that did my cat. I asked them to fix it and when they were done I asked if they fixed it they said yes it'* all silent. As soon as I got 10 mins away it opened up again! Here is my best guess: The DP is at the wrong angle and needs to be rebent up to fix this. Is there a flex DP that will work on the 93'*? Take a look and let me know what you think.

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Old 10-30-2007, 11:26 AM   #2
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Have you checked your motor mounts? If they are bad..you could get excessive flex that could cause the leak.
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Old 10-30-2007, 11:52 AM   #3
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I did look at that and they seem fine. However I am planning to replace the front lower one. I thought I read about adapting the 95+ one with the hydraulic strut on the 92-93. Is this possible or is there another option on a stiffer mount?
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Old 10-30-2007, 12:06 PM   #4
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I doubt there'* any reason why you can't use the 95 mount. Unless the exhaust hits...but I don't foresee that as an issue. The strut should help limit the movement, especially if your old mount was bad.
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Old 10-30-2007, 12:31 PM   #5
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Ok cool I am picking up my BCS today and I will pick up one of those also. Thanks Boosty.
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Old 10-30-2007, 12:37 PM   #6
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Before you remove the old one.

Take some measurements where the strut on the new mount is located.
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