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By Kahuna - 9 Years Ago
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I feel like an idiot. I have the service manual, but can't find the lash specs.
Anyone know them off hand?
There is also an article somewhere where Tim Mcmaster had a video.
Can't find that either
Help
Jim
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By Dobie - 9 Years Ago
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With a stock cam valve lash spec is 0.19" set hot, intake and exhaust. If your cam is other than stock use the cam grinder's recommendation. If you don't know what cam you have (as in my case) set 'em to 0.19. You may give up a little of your cam but at least you won't burn valves.
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By NoShortcuts - 9 Years Ago
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Jim. I think the two links below are what you're looking for. Two different videos and ways to adjust the valve lash done by Tim McMasters, Internet address Y-Block Guy.com
First method
https://www.youtube.com/watch?v=SqG-Q_kVI3s
Second method
https://www.youtube.com/watch?v=PIB9m1Kp61o
Hope this helps. 
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By Kahuna - 9 Years Ago
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Thanks so much Dob & NSC's. I finally realized it was in the book under specs. I feel like a dork.
I was just getting so frustrated. No excuse
Thanks again
Jim
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By oldcarmark - 9 Years Ago
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If You are adjusting used Rocker Arms the Feeler Gauge will give inaccurate Gap. .019 is 1/4 Turn from Zero Lash. Because of the wear Pattern on the Arms You can't accurately measure Gap between Arm and the tip of the Valve. You will almost always end up with more than .019 Gap.
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By oldcarmark - 9 Years Ago
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You are correct- 1/4 turn from Zero Lash. I will correct my previous Post.
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By Ted - 9 Years Ago
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Here's the math. At 20 tpi (threads per inch) on the adjuster, then 0.019” would be 3/8 of a turn. That's assuming a 1:1 rocker ratio. But with 1.54 rockers, it will be 1/4 turn when taking the rocker ratio into account.
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By charliemccraney - 9 Years Ago
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The 1/4 turn method takes into account the rocker ratio. 1/20" (.05") x 1/4" = .0125. On the valve end, that is .019" with 1.54:1 or .018 with 1.43:1.
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By Ted - 9 Years Ago
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Charlie. Thanks for the correction as I did not take into account the rocker arm ratio. It is indeed ¼ turn to get 0.019” at the valve with 1.54:1 rockers.
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