Incorrect oil filter without anti-drainback feature

Install the correct oil filter.

Incorrect oil viscosity

1. Drain the oil.
2. Install the correct viscosity oil.

High valve lash adjuster leak down rate

Replace the lash adjusters as required.

Worn crankshaft thrust bearing

1. Inspect the thrust bearing and crankshaft.
2. Repair or replace as required.

Damaged or faulty oil filter by-pass valve

1. Inspect the oil filter by-pass valve for proper operation.
2. Repair or replace as required.