C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Change valve seals?

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Old Jan 19, 2019 | 09:42 AM
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Default Change valve seals?

Just pick up a set of NOS heads for my 89'.
113 castings. Never been mounted.
Should I change the seals?
Their brand new , but they have sitting for 20+ years.
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Old Jan 19, 2019 | 09:58 AM
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Originally Posted by 89dd
Just pick up a set of NOS heads for my 89'.
113 castings. Never been mounted.
Should I change the seals?
Their brand new , but they have sitting for 20+ years.
for what it costs, I would, and upgrade to "better than OE factory" - cheap insurance --

Last edited by Joe C; Jan 19, 2019 at 09:59 AM.
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Old Jan 19, 2019 | 02:59 PM
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Originally Posted by 89dd
Just pick up a set of NOS heads for my 89'.
113 castings. Never been mounted.
Should I change the seals?
Their brand new , but they have sitting for 20+ years.

It is far easier and cheaper to do it now than after the heads have been mounted. Also, there are advances in materials and production methods every year. Even if the old ones are perfect, new ones are better!
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Old Jan 19, 2019 | 10:34 PM
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Definitely replace them with modern positive seals. Not just new keeper seals.
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Old Jan 20, 2019 | 07:48 PM
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Yes. I would.
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Old Jan 21, 2019 | 09:17 PM
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Changed out the old seals. Old seals still looked good. Would probably worked fine , but will sleep better knowing it's done.
Thanks everyone, knew it was the right thing to do. Just needed to be pushed.
Getting lazy I guess.
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