March 23rd, 2018, 04:36 PM
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Senior Member
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Join Date: Jan 2013
Location: Potter Valley, CA
Truck: 1960 3/4, 4 spd, stepside
Posts: 171
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Re: Valve adjustment question
I'd say shut it down.
It might be quicker if you work fast to avoid oil splatter and getting whacked by the fan, but I can't see an advantage to let it run.
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