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1999 Lexus ES 300 Rattle on Acceleration

Tiny
ELECTION82
  • MEMBER
  • 1999 LEXUS ES 300
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 131,000 MILES
My 99 Lexus is always well taken care of and oil changed every 3000 miles. Recently, the engine has started to make a tiny rattling sound. This sound only grows as the car is driven more during the day. At the start of the day, the car is fine and never makes the noise, but the more miles the car packs on during the day the louder it becomes and only when accelerating. I've taken it to the shop but they cannot reproduce the noise and they say everything looks fine. What could it be?
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Sunday, November 2nd, 2008 AT 1:13 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
This noise-is it coming from the lower or upper part of the engine-does it sounds like ticking/tapping/thudding/thumping?-Could be pinging/detonating due to excessive advance ignition timing or engine overheating
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Sunday, November 2nd, 2008 AT 3:36 PM

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