T100 SR5 Extra Cab Pickup 4WD V6-3.4L (5VZ-FE) (1998)
1. Check oil clearance between vane pump shaft and bushing.
Using a micrometer and caliper gauge, measure the oil clearance between the vane pump shaft and the bushing.
Standard clearance: 0.03 - 0.05 mm (0.0012 - 0.0020 inch).
Maximum clearance: 0.07 mm (0.0028 inch).
If it is more than maximum, replace the front housing and vane pump shaft.
2. Inspect vane pump rotor and vane plates.
a. Using a micrometer, measure the height, thickness and length of the ten plates.
Minimum Height: 8.6 mm (0.339 inch).
Minimum Thickness: 1.397 mm (0.0550 inch).
Minimum Length: 14.991 mm (0.5902 inch).
b. Using a feeler gauge, measure the clearance between the rotor groove and plate.
Maximum clearance: 0.035 mm (0.0014 inch).
If it is more than maximum, replace the plate and/or rotor with one having the same mark stamped on the cam ring.