View single post by Mark Rosenbaum
 Posted: 02-05-2007 12:56 pm
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Mark Rosenbaum



Joined: 03-12-2005
Location: Kingman, Arizona USA
Posts: 532
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 To check rotor to rotor clearances, you can use a Plastigauge or a gauge using wires of various thicknesses (like a spark plug gap gauge).  For rotor rim to housing clearance, I don't see any obvious way to use Plastigauge, but the wire gauge remains a good choice.  For both measurements, a blade type thickness gauge can also work, though perhaps with slightly less accuracy, if its blades are flexible enough.

The club store sells Plastigauge, as do many of the larger auto parts stores.  A good wire thickness gauge for clearances less than those normally found with spark plugs and ignition points may be a bit harder to locate.  It's also possible to take a length of brass or steel wire, sand or stone or file its end down until it just fits a gap, then measure the end's thickness with a micromenter.  For long-lived hand-made gauges of that sort, spring wire or music wire is often a good starting material.