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satjock 02-08-2013 10:32 AM

Newbie with a question
I own a 1995 e38, and have a nagging problem. When the car is running, I get a high pitched whine from somewhere in the rear end. It is not speed specific, it gets
louder between 800 and 1100 RPM'S, but it never gets higher pitched. And if it matters, the rear suspension creaks when any passenger gets out of the car. I don't suspect the diff, because it should br speed dependent. Is there a pump in the rear end for stability or ride i would appreciate any help or ideas. Thanks in advance.


Espresso 02-08-2013 04:10 PM

running is just idling, or driving?

Noises can travel, what you think is the rear could be transmission or even a lower pulley on the engine. get it in the air..on a lift. Start it & go from there.

satjock 02-08-2013 08:09 PM

Thanks for the response. I was just about to do the same thing, when I was talking to a couple of my reliable guys at Napa here in town. We went out and looked at it, and he told me the exact same thing happened to his wifes car. We looked under the car, and there is a big ding in the middle of the gas tank, and apparently we arehearing the fuel pump. I will have to drop the tank, remove the fuel pump, and see if I can knock the ding out of the tank.Also explains the problems with the fuel gauge. Again, thanks for the help, and looking.


satjock 02-08-2013 08:11 PM

P.S. if anyone has got tips about dropping the tank and pounding out the ding( I am aware of the explosive nature of this evolution) your tips would be greatly appreciated.

PETER NEWMAN 02-09-2013 01:36 AM

Fuel tank
You do not need to remove the tank to replace the fuel pump, Just remove the rear seat base and the pump is underneath a round black metal plate which is held in with screws. Check the condition of the fuel pipe connected to the pump and replace it if needed but DO NOT use rubber fuel hose as it will rot away. Is your fuel tank really dinged or has it collapsed. Collapsing fuel tanks on e38's is caused by blocked carbon filters and the filter is located under the rear of the left hand side rear wheel arch liner, Peter

Espresso 02-09-2013 05:51 AM

X2 on Peter's post.

My guess would be the float on the arm that reads the fuel level is impregnated with fuel. or fell off completely.

BMWFatherFigure 02-10-2013 10:26 PM

If you have to knock the dent out use a wooden stake - no sparks.

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