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| I like to use at least two different feeler gauges from at least two different toolmakers on at least two different continents. You don't have to go this far, but you definitely want to make sure you're using the METRIC number, not the SAE. On this particular Craftsman gauge, the metric number is on the bottom. |  |
Note: if your clearances seem way too tight, double-check your feeler guage and make certain you're reading the metric measurements, and not the SAE (standard.) | ||
Wipe the feeler gauge off with a new paper towel and dip it in motoroil before inserting it between the cam and cam follower. There are usually little pools of oil here and there in the head that are suitable for this. |
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| This is the touchy part. The actual valve clearance is the thickest feeler gauge you can insert between the cam and follower (also called "bucket") without binding. This is a little tricky because the head is pretty compact and you will have to bend your feeler gauge blades, which can sometimes make it seem like it's binding. Don't be afraid to bend your feeler gauges to get the most accurate reading possible. |  |
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| To avoid a false reading, try to get the bending of the feeler gauge done as far back (i.e. as far away from the insertion point) as possible. |  |
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| (Some of the gaps are more easily accessed than others.) |  |
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