PeachParts Mercedes-Benz Forum - View Single Post

JHZR2 · #7 09-20-2002, 10:43 PM

Hi,

OK, the noise is back. I dont always hear it, so it was tough to investigate besides shaking the air cleaner and just poking around. But tonight it wasnt even at a faster idle. I turned the car off, it sat for about 2 hours, then went back to it, slightly hot still, and turned it on. It started rattling immediately. I turned on the AC, and it got louder. I got out of the car, poped the hood and tried to investigate.
I found the following:

-opening the hood makes the noiser much harder to hear. It isnt from under the hood.

-from crawling around on the ground, it seems to be coming from the underside of the car, below the drivers seat. From the front of the car, there is the oil pan with drain bolt, then some stuff, then another oil pan, then this metal support that comes down slightly. It almost sounds like there must be a loose piece of metal on that support, or else a rock in my exhaust pipe that goes along right over there.

I was thinking maybe it was the fuel return line. My car has a cigar hose on it, but it is looking kind of bad. Plus, the car sometimes shakes at idle when hot. What kind of noise does the fuel return line sound like if it doesnt have the cigar hose attached? What side of the car would the noise come from?

Could a problem with the exhaust cause this? Are there any hangers that are supposed to support the exhaust pipe in that area? Maybe one rusted off of mine and so it rattles.

Any ideas would be most appreciated. Thanks

JMH