Reply to "Seeking help identifying a knocking noise"

...In My Opinion...Based Only on the Sound; It Is NOT a Main Bearing, and NOT a Rod Bearing! The 'Tick' Could Be:

1. Exhaust LEAK

2. Loose Valve Adjustment/Failing Hydraulic Lifter

3. Fuel Pump EXCENTRIC

Was the Engine Running at Normal Hot Temperatrure? Lifters will Normally Make a Similar Noise (especially 'Solids'), Until fully warmed up And the oil Pressure is UP (Hydraulics).

Good Luck with It!

… Yes! It could be a Rod Bearing, Spun after sitting for years. Just starting to go and has found 'PLAY'.  A 'Main' Bearing would sound like a Deep Rumble.

 

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