Oil pressure readout problem on the cluster - Mercedes-Benz Forum

 
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post #1 of 6 (permalink) Old 03-27-2006, 04:16 PM Thread Starter
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Oil pressure readout problem on the cluster

When starting my 190E 2.6, (1989, in the morning, the oil pressure reads 3 bars. As the engine heats to operating temp, the dial indicates at max 1.bars. Is this dial operated by a vacuum hose or am I looking at a bigger fix? Any help? Thanks
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post #2 of 6 (permalink) Old 03-27-2006, 07:24 PM
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RE: Oil pressure readout problem on the cluster

I never trust oem gauges, I would hookup a real one for a comparo. I've had many cars with poor oil pressure at idle when hot. All the way down to zero psi, but it never seems to affect anything.

Low oil pressure and driveline vibrations follow me from car to car, it's my personal jinx.
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post #3 of 6 (permalink) Old 03-27-2006, 08:24 PM Thread Starter
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RE: Oil pressure readout problem on the cluster

Thanks, that's my thoughts. Do you know if the guage is controlled by a pressure/vacuum hose?
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post #4 of 6 (permalink) Old 03-27-2006, 08:50 PM
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RE: Oil pressure readout problem on the cluster

It is an electronic sensor.
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post #5 of 6 (permalink) Old 03-28-2006, 08:26 PM Thread Starter
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RE: Oil pressure readout problem on the cluster

Thanks for the input. My problem is that according to the schematic of the oil pump, it doesn't use a typical "wankel" sort of pump. As such it would not necessarily fail as the engine got warmer.
The problem I have is that the oil pressure dial on the dash cluster goes to 0 after assuming engine operating temperature. I'm thinking that it is probably a sending unit or sensor. There shows a sensor in the oil filter assembly on the back of the engine.. Is this what sends the info to the dash cluster?
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post #6 of 6 (permalink) Old 03-29-2006, 05:58 PM
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RE: Oil pressure readout problem on the cluster

Not sure on that 6 cylinder. Somebody must know.
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