65 442 400 cui engine valve seals

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Old September 20th, 2021, 07:10 PM
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65 442 400 cui engine valve seals

Any suggestions on which type of valve seals I should get to replace the original worn out valve seals? Any other information would be helpful as well. Thx!
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Old September 20th, 2021, 07:57 PM
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Felpro SS70393 Rock Auto under $11.00
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Old September 20th, 2021, 09:44 PM
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Originally Posted by classicmuscle442
Felpro SS70393 Rock Auto under $11.00
Or you can just go and get them at your local parts store. Price should be a wash without frt.
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Old September 21st, 2021, 04:56 AM
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Olds used umbrella type valve stem seals. Over time they get hard and break. You will see pieces laying near or in the oil return holes in the head... they are not a positive type seal, they just shield the top of the guide, like an umbrella. I have been using a positive type seal lately on a few of my Oldsmobiles and no issues so far. There is a seal available that requires no machining of the valve guide boss on the head but as of now I do not know a source. I used to get mine off eBay. It seams someone found this seal although designed for another brand engine will fit the Olds head.
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Old September 21st, 2021, 05:54 AM
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Originally Posted by classicmuscle442
Felpro SS70393 Rock Auto under $11.00
Thanks for the information.
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Old September 21st, 2021, 05:56 AM
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Originally Posted by oldcutlass
Or you can just go and get them at your local parts store. Price should be a wash without frt.
Thanks for the idea!!
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Old September 21st, 2021, 05:59 AM
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Originally Posted by Oldsmaniac
Olds used umbrella type valve stem seals. Over time they get hard and break. You will see pieces laying near or in the oil return holes in the head... they are not a positive type seal, they just shield the top of the guide, like an umbrella. I have been using a positive type seal lately on a few of my Oldsmobiles and no issues so far. There is a seal available that requires no machining of the valve guide boss on the head but as of now I do not know a source. I used to get mine off eBay. It seams someone found this seal although designed for another brand engine will fit the Olds head.
If you do find out what type of seal that yo are talking about please let me know.

Thanks,
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Old September 21st, 2021, 01:19 PM
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Originally Posted by eshawl
If you do find out what type of seal that yo are talking about please let me know.

Thanks,
Possibly these are the ones I used.... not 100% sure though.

https://www.ebay.com/itm/224546023086
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