Valve Stem Tip
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Joined: Oct 2022
Posts: 912
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From: Texas
Hold on... if a valve job was done RIGHT, the installed stem height should have been accounted for and set. Sounds to me like the valve seat was ground too far, which will let the valve head sit too far into the head, which means the valve stem is now too tall. I'd go back to the machinist and ask if he thought of that...
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Club Member
Joined: Sep 2010
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I'm just learning this stuff as I go. I enjoy learning as much as I can, and doing as much as I can when I'm interested in something. I you want to bash on someone, you can bash on me and tell me how stupid I am.
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,830
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From: poway
Don't think you're stupid. You've been asking valid questions.
If the machine shop is a standard automotive one, you likely got a decent job. One specializing in HDs might have mentioned some issues but maybe not.. For 1, absolutely nothing wrong with going for a little more protrusion if using a higher lift cam.. The important thing is to make sure the spring stack is set right..
Have you checked protrusion with the new valves?
If the machine shop is a standard automotive one, you likely got a decent job. One specializing in HDs might have mentioned some issues but maybe not.. For 1, absolutely nothing wrong with going for a little more protrusion if using a higher lift cam.. The important thing is to make sure the spring stack is set right..
Have you checked protrusion with the new valves?
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Joined: Sep 2010
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Don't think you're stupid. You've been asking valid questions.
If the machine shop is a standard automotive one, you likely got a decent job. One specializing in HDs might have mentioned some issues but maybe not.. For 1, absolutely nothing wrong with going for a little more protrusion if using a higher lift cam.. The important thing is to make sure the spring stack is set right..
Have you checked protrusion with the new valves?
If the machine shop is a standard automotive one, you likely got a decent job. One specializing in HDs might have mentioned some issues but maybe not.. For 1, absolutely nothing wrong with going for a little more protrusion if using a higher lift cam.. The important thing is to make sure the spring stack is set right..
Have you checked protrusion with the new valves?
Advanced
Joined: Jul 2019
Posts: 90
Likes: 50
From: West Lafayette, IN
[QUOTE=skydude426;21168966]The machine shop did exactly what I asked them to do. Nothing more, nothing less. Bashing the machine shop is pointless and non-productive as they are not to blame.
I wasn't trying to bash the machine shop... just an observation.
I also appreciate you learning as you go; we all do that, and that's part of why we're all here. I did find it interesting that you said that the margin was right at the minimum spec. That might be the .015 you're seeing at the top of the stem for 'installed height'. Please measure very carefully; new valves MAY NOT correct the issue, and you still may be too high. Then you might have a seat dimension issue... I hope not! I'm sending positive karma!
I wasn't trying to bash the machine shop... just an observation.
I also appreciate you learning as you go; we all do that, and that's part of why we're all here. I did find it interesting that you said that the margin was right at the minimum spec. That might be the .015 you're seeing at the top of the stem for 'installed height'. Please measure very carefully; new valves MAY NOT correct the issue, and you still may be too high. Then you might have a seat dimension issue... I hope not! I'm sending positive karma!
Last edited by soarguy; Apr 18, 2023 at 05:32 PM. Reason: I forgot some stuff...
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The new intake valves showed up today. They fixed the issue. All valve stem protrusions on all valves are well within specs. I remeasured everything about these heads again to make sure and everything is within specs. I should be good to go. Thanks for the helpful comments and the good karma soarguy.
Advanced
Joined: Jul 2019
Posts: 90
Likes: 50
From: West Lafayette, IN
The new intake valves showed up today. They fixed the issue. All valve stem protrusions on all valves are well within specs. I remeasured everything about these heads again to make sure and everything is within specs. I should be good to go. Thanks for the helpful comments and the good karma soarguy.
Charles
aka soarguy
Last edited by soarguy; Apr 20, 2023 at 04:59 PM. Reason: Forgot some stuff...
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