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Old 11-09-2019, 12:25 PM   #68
JSeery
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Join Date: Nov 2012
Location: Wichita KS
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Default Re: 8BA compression issues

Quote:
Originally Posted by mrlaser View Post
Forty CPE ,Thanks for helping me see the obvious. I'm afraid that in my hyper focus on the valve stem, I missed the "forrest for the trees" . I did as you suggested and (with a good light source) viewed the valve stem and it's relationship to the guide when the valve was closed ( with proper valve lash present). As can be seen, the slightly wider portion of the stem is not interfering with the guide. With that possibility eliminated, could valve spring preload be a factor? I had no way of testing the springs that I installed.
Then how did you determine the install height? You don't just stick the springs in there, you have to determine the spring height at the seat pressure you want and then shim to that install height on the valve assembly.
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