Voyager L4-156 2.6L SOHC (1984)
Drum Micrometer
How To Measure
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A drum micrometer is used to measure the drum diameter.
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The micrometer scale should be initially set to the original (new) thickness of the drum.
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The base of the micrometer should be placed in the deepest groove in the drum and held steady while the measuring point is swiveled to find
the maximum diameter.
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The base and measuring point should be kept at the same depth in the drum.
Maximum Variation
There should be no variation in the drum diameter greater than 0.O5mm (0.002 in).
Maximum Runout
Drum runout should not exceed 0.15mm (0.006 in.) out of round.
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If the drum runout or diameter variation exceed these values the drum should be refaced.
