1993 chevy tbi gasket leak

HEVYD13 · 03-31-2011, 07:09 PM

I have a 1993 chevy 1500 with a 350 that has a tbi unit on it. I had a vacuum leak coming from the tbi gasket so i changed it but the leak is still there right in the front of the gasket. I changed it again still the same also tried a spacer with two gaskets still same spot. So i tried a different throttle body, with the same results i thought there could only be one thing left which is the intake but after a brand new gm performer intake i still have the same gasket leak in the same spot. The engine runs great and i can hold brake clean on the leak with no problem but when the brake clean goes away the leak comes back. Any ideas?

Bigplanz · 03-31-2011, 08:41 PM

Where the tbi attaches to the intake manifold might be warped. Replace the intake manifold or take it off and have a machine shop check to see if it's warped.

03-31-2011, 07:09 PM	#1
HEVYD13 Newbie Join Date: Mar 2011 Posts: 1	1993 chevy tbi gasket leak I have a 1993 chevy 1500 with a 350 that has a tbi unit on it. I had a vacuum leak coming from the tbi gasket so i changed it but the leak is still there right in the front of the gasket. I changed it again still the same also tried a spacer with two gaskets still same spot. So i tried a different throttle body, with the same results i thought there could only be one thing left which is the intake but after a brand new gm performer intake i still have the same gasket leak in the same spot. The engine runs great and i can hold brake clean on the leak with no problem but when the brake clean goes away the leak comes back. Any ideas?

03-31-2011, 08:41 PM	#2
Bigplanz Member Join Date: Apr 2009 Location: Louisville KY Posts: 417	1993 chevy tbi gasket leak Where the tbi attaches to the intake manifold might be warped. Replace the intake manifold or take it off and have a machine shop check to see if it's warped.

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1993 chevy tbi gasket leak