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Engine knocking

Tiny
FORDARRI
  • MEMBER
  • 2006 CHEVROLET MALIBU
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
My car has a very loud knocking in the engine and no trouble codes come up. It starts on the first crank and there is no water in the oil. Just looking for the first place to start. Thank you.
Sunday, January 4th, 2009 AT 12:23 AM

6 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Does it go up with engine speed? Sound like a hammer inside engine? If yes then a rod bearing is faulty.
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Monday, January 5th, 2009 AT 1:42 PM
Tiny
CRZYDREAMS1294
  • MEMBER
  • 1 POST
  • 2001 CHEVROLET MALIBU
My 2001 chevy malibu has been knocking for around a yr and I took it to get looked at the other day and they said it was a piston hitting the head and that there was no way of fixing it my? Is what would cause this and is there any way of repairing it
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Sunday, May 24th, 2020 AT 2:31 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,133 POSTS
First, how did they determine a piston was hitting the head? It could be a rod or main bearing, cam bearing. Also, it could be caused by carbon build up on the piston that there are cleaners for.
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Sunday, May 24th, 2020 AT 2:31 PM (Merged)
Tiny
2CP-ARCHIVES
  • MEMBER
  • 4,542 POSTS
  • 1998 CHEVROLET MALIBU
One day I was driving and I made a sudden U turn and it sounded as if something had snapped in the engine. The car then became very shaky and hard to accelerate. The engine light was flashing and it was making a loud engine knock. We put the car the car in reverse and and it made a horrible grinding noise. The car still starts and there are no metal pieces in the in the oil, and one lifter is not stuck. Can a stuck lifter cause this, or has something else broke and cause engine damage?
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Sunday, May 24th, 2020 AT 2:39 PM (Merged)
Tiny
RANDICO
  • MECHANIC
  • 174 POSTS
It as almost that you describe a broken axle shaft, the reason I say this is when you put the car in reverse it make a horrible grinding noise, A broken axle shaft can do this, As for the check engine light to flash an axle shaft broken wont do that, So look at your axle see if they are intact, This can be your problem
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Sunday, May 24th, 2020 AT 2:39 PM (Merged)
Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
You will also have to get a scan done to see what has caused the check light to come on.
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Sunday, May 24th, 2020 AT 2:39 PM (Merged)

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