Inspect the relief plunger.
Coat the plunger with engine oil and check that it falls smoothly into the plunger hole by its own weight.
If necessary, replace timing chain cover.
Inspect the rotor side clearance.
Using a feeler gauge and precision straight edge, measure the clearance between the inner rotors and precision straight edge.
If the side clearance is greater than maximum, replace the rotors as a set.
If necessary, replace the timing chain cover.
Side clearance:
0.040 ~ 0.090 mm (0.00157 ~ 0.00354 in.)
Inspect the oil pump body width.
Using a vernier calipers, measure the width of oil pump body.
If necessary, replace the timing chain cover.
Body width:
8.02 ~ 8.05 mm (0.3157 ~ 0.3169 in.)
Inspect the inner rotor width.
Using a vernier calipers, measure the width of inner rotor.
If necessary, replace the rotor.
Inner rotor width :
7.96 ~ 7.98 mm (0.3134 ~ 03142 in.)
