1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

intake manifold leak

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Old 06-04-03, 09:05 PM
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intake manifold leak

Well I finally fired up my engine today, all of one second. After doing this a couple times, I noticed that I had gas leaking out of my intake manifold.

The reason why is I had to connect a S4 lower manifold with a S5 upper manifold.

The problem with doing that is all but one stud aligns. I asked around and everyone in the second gen forum, and other threads I searched just said to remove the stud and it will be fine.

Well now its leaking around that area, just like I thought it would. Does anybody have any ideas on how I could recreate the clamping presure in that area of the manifold since I cant use a nut or bolt? The area of the manifold in question is where the last nut securing the mid intake manifold at the rear of the engine.
Old 06-05-03, 12:18 AM
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Try silicon on both sides of the gasket, and tighten and let it dry fully. Thats my guess.
Old 06-05-03, 12:46 AM
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is there room to tap a helicoil in?
Old 06-05-03, 06:00 PM
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helicoil?
Old 06-05-03, 06:04 PM
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Come on hornbm... do a search!

helicoils are fun! And boy can they save your a$$!

http://www.hillcliff-tools.com/helicoil.html

--Bob


Last edited by inittab; 06-05-03 at 06:08 PM.
Old 06-05-03, 11:34 PM
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I know I should have searched, lol but I had to run off to work. Those helicoils seem pretty cool.

Anyway, I'm confused on how exactly taping in a helicoil is going to help, I have the missmached bolt holes, so why shouldnt I just tap a normal hole, (assuming there is room for one, I'll fine out tomorrow) I guess the heli coils hold better, but that assumes that I have two holes ligned up to put a bolt through, which I dont.

I think I'm missing the idea being presented to me here....
Old 06-06-03, 06:54 AM
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I think the suggestion was made, while missing the point of the offset/misaligned hole pattern. Your best bet is to drill and tap a new hole providing there is enough meat left in the casting to do so. Good Luck!




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