Lubricate the valve with engine oil and check the smoothness of its lowering down (in valve hole) under the influence of its own weight. If this condition is not met, replace the pressure reducing valve. If necessary, replace the oil pump housing.
2. Check the condition of the drive and driven gears.
A. Using a feeler gauge, check the clearance between the outer diameter of the driven gear and the housing.
Rated clearance
- 2L,2L-T,3L - 0.144 - 0.219 mm
- 1KZ-T - 0.1-0.17 mm
Max Clearance
- 2L.2L-T.3L - 0.40 mm
- 1KZ-T - 0.20 mm
If the clearance exceeds the maximum allowable value, then replace the gears as a set.
If necessary, replace the oil pump housing.
B. Check the end clearance of the gears. Using a feeler gauge, measure the clearance between the gears and the precision square.
Nominal thorium gap - 0.035-0.085 mm
Maximum end clearance - 0.15 mm
If the end clearance exceeds the maximum allowable value, then replace the gears as a set. If necessary, replace the oil pump housing.
B. Check the clearance on the tops of the gears. Using a feeler gauge, measure the gap between the tops of the driven and drive gear teeth.
Nominal corner clearance
- 2L,2L-T,3L - 0.110 - 0.240 mm
- 1KZ-T - 0.06-0.16 mm
Maximum Clearance at Vertices
- 2L.2L-T.3L - 0.30 mm
- 1KZ-T - 0.21 mm
If the top clearance exceeds the maximum allowable value, then replace the gears as a set.