Oldsmobile 403 header gaskets

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Mar 27, 2009 | 06:59 PM

65az

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Joined: Mar 2009

Posts: 160

Oldsmobile 403 header gaskets

Anyone recommend a place to purchase these? I am not having much luck...

Mar 27, 2009 | 07:08 PM

joe_padavano

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Joined: Mar 2007

Posts: 50,539

From: Northern VA

Quote:

Originally Posted by 65az

Anyone recommend a place to purchase these? I am not having much luck...

Except for the roller cam 307s, all Olds motors use the same gaskets. Any Olds 350 or 455 gaskets work find. I'd recommend copper.

Mar 27, 2009 | 07:18 PM

65az

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Posts: 160

That is what I thought.. but the last two autoparts stores I talked to stated that the 403 was different, and that they are not finding any availability...

Mar 28, 2009 | 02:09 AM

Yellowstatue

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Joined: Jan 2009

Posts: 4,086

From: Too close to Toronto!!

Copper?

Quote:

Originally Posted by joe_padavano

Except for the roller cam 307s, all Olds motors use the same gaskets. Any Olds 350 or 455 gaskets work find. I'd recommend copper.

Now that you have mentioned it, what is the advantage of copper gaskets??

aren't they thinner??

Mar 28, 2009 | 06:05 AM

joe_padavano

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Joined: Mar 2007

Posts: 50,539

From: Northern VA

Quote:

Originally Posted by Yellowstatue

Now that you have mentioned it, what is the advantage of copper gaskets??

aren't they thinner??

The good copper gaskets have an embossed bead around each port. The bead compresses to form the seal and make up for unevenness.

Mar 28, 2009 | 06:06 AM

joe_padavano

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Joined: Mar 2007

Posts: 50,539

From: Northern VA

Quote:

Originally Posted by 65az

That is what I thought.. but the last two autoparts stores I talked to stated that the 403 was different, and that they are not finding any availability...

So tell them it's a 350.