ROTOR INSPECTION
BHE011011B10E01
1. Inspect the rotor and side housing clearance according to the following procedure:
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• If it is less than the minimum specification, replace the rotor.
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(1) Measure the width of the rotor housing in the position shown in the figure using a micrometer.

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Caution
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• Move the sheet metal piece out of the way when measuring.
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(2) Measure the rotor width at various positions around the rotor round periphery using a micrometer.

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(3) Compute the rotor and side housing clearance using the measurements from (1) and (2).

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Rotor and side housing clearance = (rotor housing width) - (maximum rotor width)
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Standard clearance
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0.05-0.19 mm {0.0020-0.0074 in}
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Minimum clearance
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0.05 mm {0.002 in}
2. Measure the protrusion of the rotor round using a straight edge and a feeler gauge.
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Caution
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• Measure the the protrusion of the rotor round in the three apexes of the rotor on both the front and rear sides.
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• Because the rotor round has two levels, be careful not to measure the level difference of the middle level.
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• If it is less than the minimum specification, replace the rotor.
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Standard projection
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0.12-0.18 mm {0.0048-0.0070 in}
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Minimum projection
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0.1 mm {0.0039 in}
3. Inspect the corner seal groove of the rotor by inserting the SST.
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• If 1/2 or more of either end of the SST can be inserted into the seal groove, replace the corner seal.
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• If 1/2 or more of both ends of the SST can be inserted into the corner seal groove, replace the rotor.
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Caution
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• Do not push the SST in with force.
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• Keep the SST perpendicular to the seal groove.
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• When replacing the corner seal, replace with one that matches the S or L inscription on the rotor.
4. Measure the clearance between the apex seal groove and the apex seal using a feeler gauge.
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• If it exceeds the maximum specification, replace the apex seal.
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• If the clearance is still not within the standard after replacing the apex seal, replace the rotor.
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Standard clearance
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0.042-0.101 mm {0.0017-0.0039 in}
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Maximum clearance
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0.15 mm {0.0059 in}