1990 Mercedes Benz 190e 6 cyl Two Wheel Drive Automatic
My 190 E was overheating. The mechanic found that the fan was freewheeling at higher temps and replaced the clutch.
When I picked up the car it ran at the correct temp and all seemed well.
After several miles, I pulled over to make a phone call and was alarmed by a loud noise from under the hood that I could also feel as a vibration through the steering wheel.
I turned the engine off and observed the following:
(1)The sound would "grind" slowly to a stop even after the engine was off.
(2)The sound would appear at a lower volume and pitch as I turned the key on but WITHOUT turning the engine over. Note that even without turning the engine over, this sound would again slowly "grind" to a stop within several seconds.
I looked under the hood for anything obvious (i.E. Fan shroud interfering w the fan) while the car was off.
Not seeing anything obvious, I started the car again and waited. Within two minutes (engine temp was over 80 degrees C.) The sound returned. I jumped out of the driver's seat and ran to the front to look under the hood. Of course, the noise stopped before I could take a peak under the hood!
Due to the nature of the sound (loud enough to draw looks from folks walking by) and because in over 30 years of driving I have never heard such a sound (except for the time my poly V belt broke after 130K miles!), I made the decision to take the car back to the mechanic.
The car refused to duplicate these noises for the mechanic while we both stood around waiting.
I left the car with him, assuring him that he need not be standing next to the car to hear this sound if and when it returns.
Okay, with this history, I'm hopeful that someone might have an idea of what could be causing this. Specifically, is there anything in the replacement of the fan clutch that may be "off"?
I realize that troubleshooting sounds without the ability to actually hear the sound is difficult at best. That said, my hope is that one of you may have enough experience with the fan clutch replacement to know if anything may have gone astray there.
FYI, the other work I had done was: (a)Valve cover gasket replacement (b)Transmission service: Replace Filter & pan gasket/ drain torque converter
Any thoughts will be greatly appreciated. Thanks in advance.
have the same problem?
Tuesday, March 16th, 2010 AT 3:34 PM