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valve springs z1
Posted: Wed Aug 20, 2014 9:48 pm
Author: ogre
just a question on the valve springs on my z1a. the inner springs on all of my springs are tight inside the bigger ones is this normal on these heads.on all the other heads i have stripped in the past the inner springs are loose.also in the book it says free length should be 39.3 mine are 41.3.when i stripped it the engine looked like its not run for years and some valves are bent could this have caused it.
cheers
Posted: Wed Aug 20, 2014 10:16 pm
Author: z1bman
standard springs should be a loose fit inside the outer spring
Posted: Wed Aug 20, 2014 10:19 pm
Author: ogre
cheers for reply thought they should be.
Posted: Thu Aug 21, 2014 7:48 am
Author: zed1015
Sounds like you may have aftermarket or HD race springs fitted.
These are often a tighter fit and shouldn't have caused the bent valves.
Posted: Thu Aug 21, 2014 8:52 am
Author: ogre
thanks for that when i took the inner spring out there are bright rubbing marks on it do you think am better off changing them.
cheers
Posted: Thu Aug 21, 2014 11:07 am
Author: zed1015
If their free length is above the minimum limit I would leave them in unless you like wasting money.
The valves were probably bent due to either wrong valve timing or a missed gear at high revs etc .
Posted: Thu Aug 21, 2014 11:22 am
Author: ZedHead