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Where is the Oil Pressure Sending Unit for Gauge located on a Mercury Mountaineer 2004

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Look for it near the oil filter.on the block


Posted on May 18, 2009


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2004 mercury mountaineer slight winning noise when coming to a stop and oil gauge slightly high ?

Sounds like a bearing starting to go somewhere in the driveline; assuming the differential and transfer case are full. As to the oil pressure; If you have the correct weight of oil in the engine and it has been changed on schedule; the higher the better.

Sep 25, 2014 | 2004 Mercury Mountaineer

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sounds like your themostat is sticking however if you have more water in your radiator than cooliant tht could be the problem as well

Feb 14, 2013 | 2004 Mercury Mountaineer

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No oil pressure

either replace oil sending unit or get a manual oil pressure gauge and screw in to oil sending unit port and visually check with engine running to see if or what the actual pressure is. If 0 pressure registers then bad oil pump. but if good pressure, then you have a bad oil sending unit. also change oil filter.

Mar 05, 2011 | 1998 Mercury Mountaineer

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Where is the oil sending unit located

This is for a 98 but probably will be the same Front drivers side of the engine. Behind the alternator. Hard to see and get to. It has a white plug with one wire. Fords oil pressure sending units are not real sending units. Your oil pressure gauge is a glorified idiot light. Its either on or off, always in the middle

Feb 21, 2011 | 1997 Mercury Mountaineer

1 Answer

The check gauge light came on and I saw the oil light kept switching for low to medium then the truck stop. What is my problem?

I would check the oil level before attempting to start it again. If that is good, suspect bad oil pressure sending unit.

Dec 04, 2010 | 2002 Mercury Mountaineer

1 Answer

Low oil pressure is shown on read out on dash when key is turned to second stage on ignition.

Is this when the engine is running? If yes, then replace the oil pressure sending unit. If no, it is normal, there won't be any oil pressure if the engine isn't running.

Apr 09, 2010 | 2004 Mercury Mountaineer

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