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Old 11-14-2000, 01:41 AM
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Join Date: Oct 2000
Location: California
Posts: 84

I was wondering what should be the typical OIL Pressure reading @ idle (700RPM)after the engine (92' 400E) has reached normal operating temperature.

If the needle fluctuates, what could be the cause ?

Sender has been replaced, In addtion, new oil pump too.



1986 300E
1992 400E
1989 535i
1993 Landcruiser
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Old 11-14-2000, 08:39 PM
jc300e's Avatar
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Join Date: May 2000
Location: Location: Norcross, GA
Posts: 124
at operating temp, my 400e oil psi fluctuates around 1 to 1.5. during summer months when the car runs very warm..95-100 deg C, it bounces just below 1.

every 400 i test drove when looking had a bouncing gauge. seemed to be independent of mileage on cars.

the oil psi sensor is attached at the bottom of the oil filter canister. i would surmise that the fluctuation is due to the pulsation of oil through the canister at low idle
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