Incorrect oil filter without anti-drainback feature.

Install the correct oil filter. Refer to Engine Oil and Oil Filter Replacement.

Incorrect oil viscosity.

Install the correct viscosity oil. Refer to Engine Oil and Oil Filter Replacement.

High valve lifter leak down rate.

Replace the lifters, as required. Refer to Cylinder Head Replacement - Right Side.

Worn crankshaft thrust bearing.

1. Check the crankshaft end play. Refer to Engine Mechanical Specifications.
2. Inspect the thrust bearing and crankshaft. Refer to Crankshaft and Bearing Cleaning and Inspection.
3. Repair or replace, as required. Refer to Crankshaft and Bearing Removal.

 or 

Refer to Crankshaft and Bearing Installation.

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 lifter leak down rate

Replace the lifters as required.

Worn crankshaft thrust bearing

1. Check the crankshaft end play.
2. Inspect the thrust bearing and crankshaft.
3. Repair or replace as required.

Faulty oil filter bypass valve.

The valve is now internal to the oil filter.

Replace the oil filter as required.