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Generation III External Engine
Cylinder Head Vent Gasket

Generation III External Engine LS1 | LS6 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories

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Cylinder Head Vent Gasket

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Old

Dec 19, 2025 | 12:27 PM

#21

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Quote:

Originally Posted by slowride

The type that only use an o ring also have a groove for the o ring. The older type with the metal embossed o ring will be flat as the gasket takes up the spacing and locates the o ring.

Absolutely. You can't just squeeze the o-ring against a surface that offers no protection against the O-ring being completely flattened. The LS has many "gaskets" like these. The aluminum prevents squeezing the O-ring out of shape. The surfaces "bottom out" against the aluminum rather than the O-ring itself......

Old

Dec 19, 2025 | 05:52 PM

#22

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Can't you just seal it with some Ultra Black?

Old

Dec 19, 2025 | 06:15 PM

#23

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Quote:

Originally Posted by wannafbody

Can't you just seal it with some Ultra Black?

Yes, I have done this many times.

Quote:

Originally Posted by IGN-1A

Yes, what I meant was that I installed a Pipe Plug in the Rear two holes (back of Crancase)

Are you talking about the oil galleries for the lifters?

Old

Dec 19, 2025 | 06:20 PM

#24

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Cheap parts you can buy at O'Reilly's and people use RTV..

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