Mechanics

KNOCKING NOISE

1991 Toyota Pickup • 4 cylinder 2WD Manual •

Hello I have a 1991 toyota pickup and the problem is that when I reach about 2500 RPM I hear a knocking noise. It only does that at high RPM.
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Bersyl671
June 3, 2011.




What type of knocking noises are you hearing-is it coming from the engine or somewhere else. The engine could pinging/detonating
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Tiny
Rasmataz
Jun 3, 2011.
It's coming from the engine. I let someone rev up the RPM and I can hear it in the engine, underneath. Even on just a steady motion, car not in gear at idle and stepping on the throttle at 2500 RPM you can hear it.

Tiny
Bersyl671
Jun 3, 2011.
Could be worned valves and valve lifters/camshaft-if its more like a ticking/tapping noises-check oil pressure with a mechanical gauge

Tiny
Rasmataz
Jun 3, 2011.
It's more of a heavy clonk noise. The compression test is #1 155psi #2 125psi also #3&4 at 125psi

Tiny
Bersyl671
Jun 4, 2011.
Sounds like engine bearings rod/main- check the oil pressure

Tiny
Rasmataz
Jun 4, 2011.
How you check the oil pressure.

Tiny
Bersyl671
Jun 4, 2011.

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