LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

EGR flange on MAC headers

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Old 06-11-2004, 05:02 PM
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Join Date: Dec 2002
Location: Corona/LA
Posts: 278
Angry EGR flange on MAC headers

For the life of me, I haven't been able to get that flange to stop leaking! It's where the gold/brass EGR pipe connects from the intake manifold to the pass. side header.

Did you guys have problems with yours leaking? If so, did you guys use a gasket, or rtv, or any sort? What did you do to get it to stop leaking?

I put on a blockoff plate, but it only seals towards one end of the plate since there is only one nut - the other end slightly floats off the top of the flange and causes a leak. With the gold/brass EGR pipe in place, it still leaks.
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