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Old 10-20-2009, 03:47 PM   #30
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Join Date: Jan 2009
Location: Arvada, CO
Posts: 229
Quote:
Originally Posted by stateofidleness
wow great info!

ill try to swap them when i get home tonight.

any thoughts on what the "thunking" sound is on cold starts? like hitting the side of an empty 50 gallon drum with a hammer.. or a low steel drum.. i hear it randomly about 3 times on cold (not driven in 10+ hrs) starts, if i turn car off and then restart, it's fine, but idles at 1k steady. When i put it in R, it goes down to 500 like normal.
That I don't know.
I would have to hear the noise from the cabin to hazard a decent guess.

Personally, I would check the condition of the engine mount first, because if it is really bad, the engine could be flopping around when the engine cranks to life. That's easy to do just by removing the engine cover, and driving up and down the street in first gear, flooring the car to see how much the engine moves.

Do you park on a slight incline of decline when it makes the noise?

BC.
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