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Joined: Jul 2023
Posts: 9
Grease Monkey
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Grease Monkey
Joined: Jul 2023
Posts: 9 |
Anybody know the serviceable length for valve springs
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Joined: Sep 2006
Posts: 1,255 Likes: 10
ChatMaster - 1,000
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ChatMaster - 1,000
Joined: Sep 2006
Posts: 1,255 Likes: 10 |
If you are looking for a dimension of assembled height like a modern engine would have, I don't think that number was ever documented. "It is what it is"
Oiling of the cam shaft lobes was somewhat limited on these old engines, so it is not a good idea to get too carried away with the valve spring tension. You should be able to push down and exercise every one of the valves while assembled on the cylinder head by hand.
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Joined: Dec 2019
Posts: 1,139 Likes: 75
ChatMaster - 1,000
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ChatMaster - 1,000
Joined: Dec 2019
Posts: 1,139 Likes: 75 |
Hi smlogan
I'm sure I've seen this information in a service publication somewhere, but can't seem to find it.
What I have found is that in the 1929-54 Master Parts book,
it lists the same valve spring for all 1929-33 engines,
and shows it as being 2-1/16 inches free length when new.
And 31/32 of an inch in diameter.
The springs will likely lose a little length over time, and I'm not sure how much would be considered allowable to still be serviceable.
If yours are anywhere near 2 inches, I wouldn't be concerned.
Ole S Olson
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Joined: Nov 2001
Posts: 29,863
Tech Advisor ChatMaster - 25,000
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Tech Advisor ChatMaster - 25,000
Joined: Nov 2001
Posts: 29,863 |
Additional information: The spring pressures for both the intake and exhaust valves are 45 Lbs. valves closed and 80 Lbs. valves open.
Last edited by Junkyard Dog; 03/28/24 06:56 PM.
The Mangy Old Mutt
"If It's Not Junk.....It's Not Treasure!"
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