Rotor Inspection
ROTOR INSPECTION1. Inspect the rotor and side housing clearance according to the following procedure:
^ If it is less than the minimum specification, replace the rotor.
1) Measure the width of the rotor housing in the position shown in the figure using a micrometer.
Caution
^ Move the sheet metal piece out of the way when measuring.
2) Measure the rotor width at various positions around the rotor round periphery using a micrometer.
3) Compute the rotor and side housing clearance using the measurements from (1) and (2).
Rotor and side housing clearance = (rotor housing width) -(maximum rotor width)
Standard clearance
0.05-0.19 mm (0.0020-0.0074 in)
Minimum clearance
0.05 mm (0.002 in)
2. Measure the protrusion of the rotor round using a straight edge and a feeler gauge.
Caution
^ Measure the the protrusion of the rotor round in the three apexes of the rotor on both the front and rear sides.
^ Because the rotor round has two levels, be careful not to measure the level difference of the middle level.
^ If it is less than the minimum specification, replace the rotor.
Standard projection
0.12-0.18 mm (0.0048-0.0070 in)
Minimum projection
0.1 mm (0.0039 in)
3. Inspect the corner seal groove of the rotor by inserting the SST.
^ If 1/2 or more of either end of the SST can be inserted into the seal groove, replace the corner seal.
^ If 1/2 or more of both ends of the SST can be inserted into the corner seal groove, replace the rotor.
Caution
^ Do not push the SST in with force.
^ Keep the SST perpendicular to the seal groove.
^ 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.
^ If it exceeds the maximum specification, replace the apex seal.
^ If the clearance is still not within the standard after replacing the apex seal, replace the rotor.
Standard clearance
0.042-0.101 mm (0.0017-0.0039 in)
Maximum clearance
0.15 mm (0.0059 in)