1969 427/435hp valve lash
Le Mans Master
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
That is what the service manual says.
You may have better luck, (and longer life for your feeler gauges) is you get it hot, shut it down and pull one cover and adjust the intake as the exhaust opens and the intake as the exhaust closes.
All I ever got doing it running was the ends chewed up on the feeler gauges. Didn't quite cut divots, but you could sure see where the end of the valve was.
Thread Starter
4th Gear
Joined: May 2014
Posts: 4
Likes: 0
That is what the service manual says.
You may have better luck, (and longer life for your feeler gauges) is you get it hot, shut it down and pull one cover and adjust the intake as the exhaust opens and the intake as the exhaust closes.
All I ever got doing it running was the ends chewed up on the feeler gauges. Didn't quite cut divots, but you could sure see where the end of the valve was.
Racer
Joined: Jul 2008
Posts: 301
Likes: 5
From: Youngstown NY
Valve lash.
That is what the service manual says.
You may have better luck, (and longer life for your feeler gauges) is you get it hot, shut it down and pull one cover and adjust the intake as the exhaust opens and the intake as the exhaust closes.
All I ever got doing it running was the ends chewed up on the feeler gauges. Didn't quite cut divots, but you could sure see where the end of the valve was.
Race Director
Joined: Dec 1999
Posts: 11,096
Likes: 990
From: Sierra Foothills CA
Once you know they're set properly, wait until the engine is cold (as in the next day or later) and measure them that way. Write it down and from then on you can use those specs to set them cold- much nicer. 
Thread Starter
4th Gear
Joined: May 2014
Posts: 4
Likes: 0
Thank you, that does sound like it would make it easier the next time !
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Le Mans Master
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
Thanks for the correction!!