Noises

Tiny
STJ115
  • MEMBER
  • 2001 MITSUBISHI DIAMANTE
  • 6 CYL
  • 85,000 MILES
I recently got work done on my car including an oil change, a new motor mount and my belts and hoses replaced and now my car makes a crackling noise when I start it up, but only for the first five minutes while the car is warming up. It almost sounds like the engine isn't getting enough oil/lubrication at start up but am not sure.
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Monday, February 14th, 2011 AT 12:11 AM

5 Replies

Tiny
ERNEST CLARK
  • EXPERT
It's pretty hard (impossible) for me to interpret what a "crackling" noise is, as different noises sound different to different people.

Try to determine exactly what part of the engine it's coming from. Front, back, right, left. Also, tell me if it does this only while idling in park/nuetral or while driving as well.
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Monday, February 14th, 2011 AT 12:21 AM
Tiny
STJ115
  • MEMBER
The noise does not happen at park/neutral or idling unless it hasn't warmed up. Once its warmed up the sound goes away for the rest of the drive. As for where the sound comes from it appears from the top of the engine.
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Monday, February 14th, 2011 AT 12:44 AM
Tiny
ERNEST CLARK
  • EXPERT
The reason I ask for specifics is to eliminate guessing and/or confusion. In your reply you say "It does not happen at park/neutral UNLESS it hasn't warmed up". So that must mean it DOES happen while idling in park/neutral. Then you say "once its warmed up, the sound goes away for the rest of the drive". So does that mean it makes the sound while in park/neutral AND while driving? Keep in mind, if the car is hot or cold doesn't matter at this point. I'm trying to narrow this down in a logical order without having to make guesses that will lead to nowhere.
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Monday, February 14th, 2011 AT 12:56 AM
Tiny
STJ115
  • MEMBER
Yes. The sound does occur while in park/neutral and driving.
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Monday, February 14th, 2011 AT 1:00 AM
Tiny
ERNEST CLARK
  • EXPERT
You'll first need to eliminate the simple things. Check the tightness of the belt as well as the condition. Usually this would cause a squeaking noise, but I've seen/heard stranger. If this isn't the source of your noise, remove the belt and turn all of your pulleys by hand. (Try to turn them fast) If one/more of them are hard to turn and/or make any noise, that'll be the problem.

If all pulleys check out good, purchase an automotive stethoscope and use it to listen to various spots around the engine. However, this'll mean removing parts of the engine once you've located the source if it turns out to be internal. If you need a specific procedure, let me know.
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Monday, February 14th, 2011 AT 1:24 AM

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