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Onan Twin Valve Cover Gasket Part Number Interchanges?


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Old 07-29-2017, 02:20:41 PM
Birken Vogt Birken Vogt is offline
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Default Onan Twin Valve Cover Gasket Part Number Interchanges?

110-1921 BFA
110-0667 CCK
110-3606 CCK
110-3575 NH

I'm sure there are more

What is the difference? Which ones will interchange? Which ones should I buy to keep in stock (mostly I work on old CCKs with some old NHs thrown in as well as NHD, NHE, NHM.

Most recently I worked on an old round generator CCK and used a pair of 110-3606 I had on the truck.
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Old 07-29-2017, 03:29:19 PM
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Billy J Shafer Billy J Shafer is offline
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Default Re: Onan Twin Valve Cover Gasket Part Number Interchanges?

I think the older gaskets were a solid gasket. The newer style just covered the edge. I will have to check on it.
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Old 07-29-2017, 03:53:18 PM
Birken Vogt Birken Vogt is offline
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Default Re: Onan Twin Valve Cover Gasket Part Number Interchanges?

All the numbers I listed above are perimeter gaskets. When you say solid gasket I assume you mean a flat sheet with a dent in it and a bolt hole instead of the large cutout? I have never seen one of that style.

The only difference I know so far is 110-3575 is for some kind of N series and does not have the one thick edge like a CCK. I don't know about the others, the drawings are not detailed enough.
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Old 07-29-2017, 06:52:49 PM
David C David C is online now
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Default Re: Onan Twin Valve Cover Gasket Part Number Interchanges?

I can't tell you if the gaskets are different for each model, but I have had great results just using a very thin layer of RTV. Just may sure the gasket surfaces are completely oil free and bolt the covers on while the RTV is still sticky. I have about six CCK/BF/NH models that I have used RTV on and they are all bone dry in that area. The RTV doesn't wick or seep like paper gaskets. Just my .02 cents worth.

David C.
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