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Old 03-11-2013, 03:32 PM
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Gaskets or no gaskets? Chevy 350

Guys - I'm new at building a Chevy engine. (All previous jobs have been on Studebaker L-heads, OHV 6s and the 259/289 V8s.)

I'm stuck on something and need a Chevy expert's help, please.

On the picture I just took and posted you see both the attachment points for the oil pump and the filter adapter. My gasket kit does not include ones for either, leading me to wonder if either spots is supposed to have a gasket.

Both are encased in an oil atmosphere when the engine's 'put together' but I'm hesitant to bolt up metal on metal without a gasket. Especially when we're talking about oil under pressure.

What's the word on this? And thanks much for helping a newby!
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Old 03-11-2013, 03:46 PM
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No gaskets needed. GM didn't use them. As you stated they are already in oil and are machined surfaces.
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Old 03-11-2013, 04:58 PM
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gaskets or no gaskets

Quote:
Originally Posted by StudebakerTom View Post
Guys - I'm new at building a Chevy engine. (All previous jobs have been on Studebaker L-heads, OHV 6s and the 259/289 V8s.)

I'm stuck on something and need a Chevy expert's help, please.

On the picture I just took and posted you see both the attachment points for the oil pump and the filter adapter. My gasket kit does not include ones for either, leading me to wonder if either spots is supposed to have a gasket.

Both are encased in an oil atmosphere when the engine's 'put together' but I'm hesitant to bolt up metal on metal without a gasket. Especially when we're talking about oil under pressure.

What's the word on this? And thanks much for helping a newby!
Hi tom,, your oil filter adapter has a raised lip where it contacts the block to seal. The oil pump is a machined surface on both. I tend to run a file on both surfaces, pump/block, before assembly..Good Luck Jim
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Old 03-12-2013, 09:19 AM
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Thanks so much, Bob & Jim.
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Old 03-14-2013, 05:11 AM
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Quote:
Originally Posted by StudebakerTom View Post
Guys - I'm new at building a Chevy engine. (All previous jobs have been on Studebaker L-heads, OHV 6s and the 259/289 V8s.)

I'm stuck on something and need a Chevy expert's help, please.

On the picture I just took and posted you see both the attachment points for the oil pump and the filter adapter. My gasket kit does not include ones for either, leading me to wonder if either spots is supposed to have a gasket.

Both are encased in an oil atmosphere when the engine's 'put together' but I'm hesitant to bolt up metal on metal without a gasket. Especially when we're talking about oil under pressure.

What's the word on this? And thanks much for helping a newby!
Agree no need for a filter mount gasket. And normally nothing needed for the oil pump either.

If an oil pump sealing surface was dinged, there are soft copper gaskets that can save you from remachining the surfaces.

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Old 03-14-2013, 11:26 AM
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I always apply a thin film of Permatex "Aviation" to the oil pump flange. Can't "hurt"... No RTV, PLEASE!

Jim
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