Kia Niro: Lubrication System / Oil Pump Repair procedures

Remove the timing chain cover.

(Refer to Timing System – “Timing Chain Cover”)

Remove the oil level gauge pipe.

(Refer to Lubrication System - "Oil Level Gauge & Pipe")

Remove the oil pump cover (A).

Remove the inner rotor (A) and outer rotor (B).

Install in the reverse order of removal.

Remove the relief plunger.

Remove the plug (A), spring (B) and relief plunger (C).

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 relief valve spring.

Inspect for distortion or breakdown of the relief valve spring.

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.

Inspect the rotor body clearance.

Using a feeler gauge, measure the clearance between the outer rotor and body.

If the body clearance is greater than maximum, replace the rotors as a set.

If necessary, replace the timing chain cover.

Inspect the rotor guide clearance.