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Old 12-04-2019, 12:22 PM   #6
alexiskai
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Location: Mebane NC
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Default Re: Vacuum testing to diagnose fast idle

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Quote:
Originally Posted by rocket1 View Post
I would check the tappet clearance on the number two cylinder.
Is that something I check by taking off the valve cover or by taking off the head? I've never worked on valves before, I have no idea what I'm doing.

Edit: Did some googling, looks like it's the valve cover. I found this page that describes a trick for saving time adjusting the valves.

Edit 2: Ah, it's only adjustable via the valve cover if the engine already has adjustable lifters. Not sure about mine, probably not. If not, checking the clearance would simply allow me to rule incorrect clearance in or out as a root cause; fixing it would require removing the head to get the valve out.

Last edited by alexiskai; 12-04-2019 at 12:46 PM.
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