2000 Chevy Impala - Rattling noise from engine

Tiny
BORTIQUAI
  • MEMBER
  • 2000 CHEVROLET IMPALA
I have a 2000 Chevy Impala with about 125,000 miles. I have been having a problem for a while now that when I am accelerating, or going up a hill, the engine makes a rattling noise. I think I have read that this may be called pinking? Anyway, someone told me it is the pistons and it is because I am using bad quality gas. However, have tried every kind of gas, and always use "premium". Lately, I only use Shell Premium, but still the same problem. I have taken it to a mechanic a couple times, but no one seems to be able to fix it. It certainly seems like it gets worse the longer the car has been running, and seems to lack power as the rattling noise gets louder.
Any suggestions?
Thank you.
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Thursday, August 23rd, 2007 AT 11:03 AM

2 Replies

Tiny
BOOTDOG
  • EXPERT
The only other thing I can suggest is to put some octane boost in the tank. Places like napa or carquest will have it.
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Friday, August 24th, 2007 AT 10:24 AM
Tiny
BORTIQUAI
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Yeah, i've tried that, along with Fule Injector cleaner and Oil treatment - thick stuff that looks like honey. The engine runs very smoothly, the only problem is the rattling after it's been runninf for a while. Usually after 20-30 minutes I start to notice it.
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Friday, August 24th, 2007 AT 11:20 AM

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