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Neil Harvey Neil Harvey is offline
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Join Date: May 2004
Posts: 232
Originally Posted by JonT View Post
Reviving and old thread here: Can some engine building experts confirm/refute or clarify the test Jon B suggests in post #5 for lash test:

"One simple lash test is to lay the crank and intermediate shaft in the case, then rotate the crank in a way that will pop the i-shaft up out of its bearings if too tight (without the shaft coupled to the oil pump). The i-shaft gear should also be checked for run-out, to make sure it's seated properly. "

Completely wrong. Do not use this method if you wish to have an accurate measurement of the gear lash. "Shade tree" building at its best.

Measure the lash with a dial indicator making sure the probe does not slide down the gear tooth. From memory, lash wants to be at least 0.002"+ on a new aluminum gear understanding that this gear will increase in size with temp and the lash will decrease. With some use this gear will show signs of wear and its important to crack check this gear too.
Old 06-16-2018, 04:26 PM
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