Page 136 of 1997 Competition Parts Catalog by Mazda MotorSports

measuring clearance between rotor and rotor housing 1 when bearing clearances have been set install outer oil seals o-ring and springs on one side of the rotor this will prevent the rotor from scuffing the side housing as it is rotated for measurements 2 invert the rotor and insert it in the rotor housing the o-ring will hold the oil seal in place 3 using a feeler gauge as shown in figure 2 measure the clearance between the rotor and the rotor housing there are four 4 measuring points two on each side of the rotor housing at approximately 1 below and above the horizontal centerline tech tips figure 2 allowable rotor to rotor housing clearance is 12a engine 0.40 0.70 mm 0.0157 0.0276 13b engine 0.45 0.75 mm 0.0177 0.0295 if the measurement taken at any one of the four 4 points is less than the allowable range the rotor may contact the housing at high rpm the housing should be replaced or the rotor can be clearanced by grinding the face cleaning clean carbon and any other deposits with paint thinner or a similar solvent remove all scale and rust from the coolant passages and water jackets tt-5

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