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.

Worn crankshaft thrust bearing

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

High valve lifter leak down rate

Replace the lifters as required.

Excessive rod and main bearing clearance

Replace the bearings as required.