Cause  | Correction  | ||||
|---|---|---|---|---|---|
Incorrect oil filter without anti-drainback feature  | Install the correct oil filter.  | ||||
Incorrect oil viscosity  | 
  | ||||
High valve lifter leak down rate  | Replace the lifters as required.  | ||||
Worn crankshaft thrust bearing  | 
 
  | ||||
Damaged or faulty oil filter by-pass valve  | 
 
  |