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Old March 27th, 2009, 06:59 PM
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Oldsmobile 403 header gaskets
Anyone recommend a place to purchase these? I am not having much luck...
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Old March 27th, 2009, 07:08 PM
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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.
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Old March 27th, 2009, 07:18 PM
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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...
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Old March 28th, 2009, 02:09 AM
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Smile Copper?
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??
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Old March 28th, 2009, 06:05 AM
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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.
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Old March 28th, 2009, 06:06 AM
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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.
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Old March 28th, 2009, 12:25 PM
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Buy the Summit or Mr. Gasket set:

http://store.summitracing.com/egnsea...view=sku&RC=10
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Old March 28th, 2009, 12:45 PM
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Originally Posted by joe_padavano
So tell them it's a 350.
Then he'll end up with chevy gaskets
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Old March 28th, 2009, 09:21 PM
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Originally Posted by joe_padavano
The good copper gaskets have an embossed bead around each port. The bead compresses to form the seal and make up for unevenness.
Thanks for the info..my other thought was...is there an advantage for the metal to metal heat transfer down the hedders
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