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JFairman JFairman is offline
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Join Date: Jul 2006
Location: S. Florida
Posts: 7,130
I adjust my valve clearances to a snug .004" using the Sir Tools feeler gauge made for 911 valve adjustments.

If you remove a valve cover you can check the valve guides by g e n t l y trying to move the valve spring retainers sideways with a large flat blade screwdriver. You can do that to the intakes without draining the motor oil but for the exhaust valves you have to either drain the oil or jack up the side of the car you're going to check high enough that the motor oil in the case goes to the opposite side of the motor. You may still end up with some oil spillage doing that so it's best to wait till you change the oil and do it while there's no oil in it.

If you can move the valve spring retainers sideways a little the valve guides are worn. The exhaust valve guides wear faster than the intakes because the exhaust valves and guides run so much hotter.

People that track their cars can easily wear out the exhaust valve guides in 40,000 miles or less depending on how they drive it and what kind of valve guides are in it. Cars that get regular oil changes and are driven on the street only will have them last longer.

At the same time it doesn't sound like you work on your own car so maybe this info can be a little helpful for others.
Old 03-15-2017, 06:04 PM
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