72 stock intake manifold and gasket issue - Pontiac GTO Forum
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post #1 of 5 (permalink) Old 12-16-2017, 10:29 AM Thread Starter
 
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72 stock intake manifold and gasket issue

I have a Fel Pro rebuild engine gasket kit. It has two different intake gaskets in the kit. Neither one seem to fully cover the sealing areas. I'm not sure what the gasket should cover.
One, there are two big holes (about 3/4" dia.) in the heads on each end. The gaskets are long enough to cover one or the other, not both.
Two, Near the middle of the head, the tall port, the one gasket I felt was right to match that, leaves a bit of the top of the port exposed with no sealing. The other gasket has a smaller square rather than rectangle shape for that port, so I felt that wasn't the correct gasket.
What have those of you who've done this experienced with gasket sealing?
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post #2 of 5 (permalink) Old 12-16-2017, 11:56 AM
 
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Use the two intake gaskets in the full gasket kit that have the two small crossover holes. IF you had an engine with '65-71 heads & intake, you would use one small crossover hole intake gasket, & one large crossover hole intake gasket.
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post #3 of 5 (permalink) Old 12-16-2017, 01:28 PM Thread Starter
 
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I just visited Wallace site. So, the small upper void in head is just a hollow for heat? Nothing else exits that upper head void in my 7k3 heads? I can be left unsealed?
What are the 3/4 " holes on ends for? Do they take a separate seal?
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post #4 of 5 (permalink) Old 12-16-2017, 04:48 PM
 
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"...What are the 3/4 " holes on ends for? Do they take a separate seal? "


The rear hole on the driver side, takes a freeze plug.

The rear hole on the passenger side takes a heater hose nipple.

https://www.ebay.com/itm/1965-81-Pon...4383.l4275.c10

The front holes are covered by the water crossover part of the intake manifold. Therefore the round holes in the gaskets will cover the front holes in the heads.


"...Nothing else exits that upper head void in my 7k3 heads?...can be left unsealed?

Correct.

Last edited by bigD; 12-16-2017 at 05:05 PM.
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post #5 of 5 (permalink) Old 12-17-2017, 11:14 AM Thread Starter
 
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Thank you. I do have the water outlet nipple in there yet. So, I need to get a freeze plug for the other side and the gaskets then go forward on the heads.
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  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, Lemans & GTO Complete Engine Compartment Discussion

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