Valve lash

JtownJoe

JtownJoe

Senior Member
Checking the valve lash and on the spec's of .13 int. & .15 exh. all mine are .12 int. & .13 exh. Is that really important enough to try to correct or close enough for all practical purposes?
 
That is close enough, as the metal warms up it will expand some and make up a bit of the distance. If you could get the exhaust closer it would be better, if not then it will work.
 
A wider gap is of no detriment, except it is a bit noisier. But a too narrow gap, and when everything warms up, the valves will not seat properly, and this may give you problems in the future.
 
JtownJoe said:
Checking the valve lash and on the spec's of .13 int. & .15 exh. all mine are .12 int. & .13 exh. Is that really important enough to try to correct or close enough for all practical purposes?
Click to expand...

Just right is great.
To tight is bad, if you run your engine hard, or climbing some big hills. Good by exhaust valve.
To loose is better than to tight. I always adjust valves on the loose side. After a new valve job they will wear in the seat a little.
 
I guess the consensus is right on or OK, slightly on the looser side but no go at 1 or 2 thousands on the tighter side. I'll just have to buy a couple of wrenches to grind down thin enough to use together & loosen em' up. Thanx for all the input!
 
Tom Wesenberg said:
Russ, notice the decimal and zero.
.13 vs .013
.13 would be 10 times the gap of .013
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Yup,
And my engine rebuilder's brass placque reads: BORE-.010 It's really .100 BORE! He must have flunked MATH!:eek: I only flunked GIRLS!:mad: Bill W.
 

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It's an easy mistake, and since I knew what was meant I didn't even notice the ommision of the zero until Western 77 mentioned it in post 8.
 
The intake lash seems fine. The exhaust could be a bit looser. I seem to remember something about them having exhaust valve burning issues and the lash was increased to .020-.022" on the B engines [which had a slightly different camshaft]. I guess most fellas run the exhausts at .015-.018" which seems to work fine. If I'm wrong, it'll be corrected, and, rightly so.
 
I run most of mine at .016 , intake and exhaust. With a little noise it'll keep its poise. Burned valves are no fun to fix.
 
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