Engine Noise on Start-Up, but Only Lasting a Few Seconds

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Cause	Correction
Incorrect oil filter without anti-drainback feature	Install the correct oil filter.
Incorrect oil viscosity	Drain the engine oil and replace with the correct viscosity oil.
Damaged or faulty oil filter by-pass valve	Inspect the oil filter by-pass valve for proper operation. Repair or replace as required.
High SHLA, valve lifter, leak down rate	Replace the SHLA, valve lifters, as required.
Worn crankshaft thrust bearing	Inspect the thrust bearing and crankshaft. Repair or replace as required.