12-30-2012, 09:12 PM | #1 |
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Valve lash
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?
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12-30-2012, 09:20 PM | #2 |
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Re: Valve lash
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.
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12-31-2012, 12:22 AM | #3 |
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Re: Valve lash
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.
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12-31-2012, 12:32 AM | #4 |
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Re: Valve lash
My babbitt pourer guy gets hysterical if its not .015
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12-31-2012, 08:40 AM | #5 | |
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Re: Valve lash
Quote:
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. |
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12-31-2012, 08:50 AM | #6 |
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Re: Valve lash
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12-31-2012, 09:12 AM | #7 |
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Re: Valve lash
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!
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01-02-2013, 08:24 PM | #8 |
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Re: Valve lash
.13 and .12 are way to loose. Try .013 and .015 and you will be in the ballpark! JB
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01-03-2013, 01:55 AM | #9 |
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Re: Valve lash
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01-03-2013, 02:09 AM | #10 |
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Re: Valve lash
Russ, notice the decimal and zero.
.13 vs .013 .13 would be 10 times the gap of .013 |
01-03-2013, 03:32 AM | #11 | |
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Re: Valve lash
Quote:
And my engine rebuilder's brass placque reads: BORE-.010 It's really .100 BORE! He must have flunked MATH! I only flunked GIRLS! Bill W.
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01-03-2013, 08:53 AM | #12 |
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Re: Valve lash
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.
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01-03-2013, 10:59 AM | #13 |
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Re: Valve lash
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.
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01-03-2013, 01:25 PM | #14 |
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Re: Valve lash
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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