KNOCKING NOISE

1991 Toyota Pickup

Tiny

bersyl671

June, 3, 2011 AT 8:36 PM

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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6 Answers

Tiny

rasmataz

June, 3, 2011 AT 8:42 PM

What type of knocking noises are you hearing-is it coming from the engine or somewhere else. The engine could pinging/detonating

Tiny

bersyl671

June, 3, 2011 AT 11:06 PM

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

rasmataz

June, 3, 2011 AT 11:19 PM

Could be worned valves and valve lifters/camshaft-if its more like a ticking/tapping noises-check oil pressure with a mechanical gauge

Tiny

bersyl671

June, 4, 2011 AT 2:59 AM

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

Tiny

rasmataz

June, 4, 2011 AT 6:04 PM

Sounds like engine bearings rod/main- check the oil pressure

Tiny

bersyl671

June, 4, 2011 AT 9:09 PM

How you check the oil pressure.

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