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 Cams / Heads & Valve Train
 Setting lash
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Miles
Cochise

Canada
209 Posts

Posted - 22 May 2018 :  12:35:51 PM  Show Profile  Reply with Quote
When setting my roller rocker lash yesterday on, a hot engine, I found I could put a stepped 7-9 feeler right past the 7 and up to the 9 thou step, when I tried to insert an 8-10 thou feeler, it would not go in. I miced the feelers and they are accurate. I am inserting the feelers from the side in the center of the roller. Could the roller be rolling onto the stepped part and giving me a false reading? Is it practice to set rollers so the roller rolls onto the feeler or should I be checking from the front of rear in line with the roller pin?

Blued and Painted
Chief PONTIAC

USA
3503 Posts

Posted - 23 May 2018 :  12:32:03 AM  Show Profile  Reply with Quote
Is it a solid lift cam an lifters?
A hydrolic cam will have some preload with no lash.


Bull Nose Formula/ 461/ Q-Jet/
TH400/ 3.08 8.5 / R44TS.
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Miles
Cochise

Canada
209 Posts

Posted - 23 May 2018 :  10:04:47 AM  Show Profile  Reply with Quote
Crower HIPPO solid rollers Crower roller rockers.
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Blued and Painted
Chief PONTIAC

USA
3503 Posts

Posted - 25 May 2018 :  09:54:48 AM  Show Profile  Reply with Quote
Ok. What does the cam card suggest for lash.

I only use go/no go gauges on over head cam engines where clearance is adjusted with a puck / shim, and where clearance speck only needs to be in a specified range.

A standard feeler gauge of specific thickness should have only moderate drag when put between top of valve and rocker roller, perpendicular to the rocker trunnion.


Bull Nose Formula/ 461/ Q-Jet/
TH400/ 3.08 8.5 / R44TS.

Edited by - Blued and Painted on 25 May 2018 10:04:42 AM
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Miles
Cochise

Canada
209 Posts

Posted - 03 Jun 2018 :  09:57:35 AM  Show Profile  Reply with Quote
Thanks, I had better luck with the standard feelers.
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