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Knocking noise

Tiny
BERSYL671
  • MEMBER
  • 1991 TOYOTA PICKUP
  • 4 CYL
  • 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.
Friday, June 3rd, 2011 AT 8:36 PM

6 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
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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Friday, June 3rd, 2011 AT 8:42 PM
Tiny
BERSYL671
  • MEMBER
  • 55 POSTS
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.
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Friday, June 3rd, 2011 AT 11:06 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be worned valves and valve lifters/camshaft-if its more like a ticking/tapping noises-check oil pressure with a mechanical gauge
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Friday, June 3rd, 2011 AT 11:19 PM
Tiny
BERSYL671
  • MEMBER
  • 55 POSTS
It's more of a heavy clonk noise. The compression test is #1 155psi #2 125psi also #3&4 at 125psi
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Saturday, June 4th, 2011 AT 2:59 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Sounds like engine bearings rod/main- check the oil pressure
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Saturday, June 4th, 2011 AT 6:04 PM
Tiny
BERSYL671
  • MEMBER
  • 55 POSTS
How you check the oil pressure.
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+1
Saturday, June 4th, 2011 AT 9:09 PM

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