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Old 02-15-2006, 04:11 PM
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Don Moyer Don Moyer is offline
 
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Ed,

The only experience we have ever had with valve springs breaking has been that which resulted from water damage to the springs (slight rustiness) and/or water damage to the valve stems and guides which caused the valves to stick a bit. The combination of those two situations would cause the springs to break in multiple places along the length of the spring.

I'm not sure what springs you've been using, but the OEM springs from the 1980's and 1990's were particularly bad in this regard. We began using springs from another manufacturer around 2000, which helped considerably, but we still had a few reported failures in the aftermath of water intrusion episodes that resulted in sea water backing into the combustion chambers. About a year ago, we began using stainless valve springs and to this point have no reported failures.

Regards,

Don Moyer
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