valve seal question
Thread Starter
Pro
Joined: Jan 2009
Posts: 686
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From: Austin Texas
valve seal question
I put a head together, and when you put the valve through the seal, theres a plastic piece you put over the stem of the valve so you don't damage the seal. question I have is, if I need to remove a valve after a head is assembled, does pulling the valve back out truly damage the seal or will it be ok if I just go slow ?
Safety Car
Joined: Apr 2005
Posts: 3,624
Likes: 431
From: Dale City VA
I put a head together, and when you put the valve through the seal, theres a plastic piece you put over the stem of the valve so you don't damage the seal. question I have is, if I need to remove a valve after a head is assembled, does pulling the valve back out truly damage the seal or will it be ok if I just go slow ?
If your VERY careful removing and re-installing the valves you won't damage the seal without it.
Will
Team Owner
Joined: Oct 2004
Posts: 81,241
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From: altered state
St. Jude Donor '05
Pull/push gently and twist. Touch of oil or wd40 doesnt hurt. Some say dry
Dont force it in/out quick. Used no special tool
Shouldnt hurt them at all just put a set together this morning and *DAH*forgot one of the rotators...apart it came. No issue going back together.
Dont force it in/out quick. Used no special tool
Shouldnt hurt them at all just put a set together this morning and *DAH*forgot one of the rotators...apart it came. No issue going back together.
Thread Starter
Pro
Joined: Jan 2009
Posts: 686
Likes: 4
From: Austin Texas
thanks for ya'alls comments. I cant remember if I cleaned the seats off before I assembled the head, dangit. I probably did, but .... just want to go back and have another look.
What's the most you can shim a valve spring ? I have one that looks like its about 050" down...
What's the most you can shim a valve spring ? I have one that looks like its about 050" down...
Safety Car
Joined: Apr 2005
Posts: 3,624
Likes: 431
From: Dale City VA
On smog era BBC's that had exhaust rotators you commonly shim .250 to get rid of the rotators when using aftermarket performance valve springs/retainers/locks.... however they make special spacers/spring seats for that.
I prefer to stack NO more than .120 worth (2X .060) of shims under a spring - OR no more than 3 shims total.... Those shims rub against each other and the more of them you have stacked, the more metal your putting in the oil.
With .050 difference in spring set up height, I'd either:
1. Put a .060 under it .
2. Put a .030 and .015 under it .
Will
