Author Topic: Valve Stem Oil Seals, Eight or Four?  (Read 1135 times)

Offline Eldrick

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Valve Stem Oil Seals, Eight or Four?
« on: June 19, 2024, 01:21:57 PM »
On my valve stems (Inlet Side) I have a rubber oil seal with a metal spring on its base. On the Exhaust side stems there are no such seals. My Workshop manual says I need eight and my Haynes Manual says I need four.
How many do I need please?
1975 Honda CB400f - Red

Offline Bryanj

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Re: Valve Stem Oil Seals, Eight or Four?
« Reply #1 on: June 19, 2024, 01:36:28 PM »
Depends on year and who has worked on it previously, look at the top of the guides and if flat topped fit seals, if cone shaped do not. In these instances it would only be correct if seals were missing on exhaust side

Offline Johnwebley

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Re: Valve Stem Oil Seals, Eight or Four?
« Reply #2 on: June 19, 2024, 01:38:20 PM »
On the 500,fit 8

The top of the guide should have a groove for the seal to locate



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Offline Deano400

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Re: Valve Stem Oil Seals, Eight or Four?
« Reply #3 on: June 19, 2024, 02:17:19 PM »
On the 400/4 I have only ever seen the seals on the inlet guides. The inlet and exhaust guides are different part numbers.

Offline Eldrick

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Re: Valve Stem Oil Seals, Eight or Four?
« Reply #4 on: June 19, 2024, 03:52:01 PM »
Depends on year and who has worked on it previously, look at the top of the guides and if flat topped fit seals, if cone shaped do not. In these instances it would only be correct if seals were missing on exhaust side

Four it is then.
Thanks
1975 Honda CB400f - Red

 

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