Question about 2000 Mercury Grand Marquis

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How do I change the thermostat 2000 grand marquis

How do I change the thermostat to a 2000 grand marquis. I have it in and the O ring but it is still leaking. Do I need to use the gasket that comes with it? If I put it on the way they told me it doesn't sit right in the housing.

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It needs to sit in a recess in the housing, typically if you are asking the question that you are asking, the thermostat housing may be bent or cracked. If it is nto installed correctly, it kills the housing...Must be perfectly true, and sqaure....

I am not sure about the gasket, if it came with, use it, some designs use o ring to seat the thermostat, others use o ring as seal...

i normally seal it anyways...

Posted on Sep 27, 2009

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Posted on Jan 02, 2017

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1 Answer

How do you fix a coolant temp sensor that just popped uot


yes, it screws into the top of the intake manifold in the front passenger side corner opposite to the thermostat.
replace O-ring when change.

Feb 28, 2012 | 1998 Mercury Grand Marquis

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I hav 2000 grand marqius ls - When I changed spark plog thei found engine oil on it particularly cylinder No. 3 and 4 that the car was Shaking before I change the spark


When you get oil into the cylinders that are side by side, you may have a bad head gasket or bad stem seals on the valves. When all 4 cylinders on that side of the engine are oil-covered you can have additional problems like bad piston rings.

You should have a compression test to determine what the condition of the rings is before removing a head. If the compression is good, a good mechanic may be able to change the Valve seals without a complete teardown. If not, the problem must be fixed by pulling the bad head.

Jun 25, 2011 | 2000 Mercury Grand Marquis

1 Answer

I have what appears to be a broken 9L3Z8592B (thermostat housing) from a 2000 Grand Marquis. How big a deal is that to replace? The part's cheap enough...


its not hard to replace and while your there change the thermostat and gasket(seal) and the anti-freeze if it hasn`t been changed.make sure all the air is out of the system after refilling.

Apr 24, 2011 | 2000 Mercury Grand Marquis

1 Answer

Change a thermostat 2000 marquis


  1. Drain the coolant below the water thermostat.
  2. Remove the engine appearance cover.
  3. 84796017
  4. Remove the bolts, the water outlet adapter and hose and position out of the way.
  5. 84796018
    1. Remove the water thermostat and the O-ring seal from the intake manifold.
      • Inspect the O-ring seal, install a new seal if necessary.
    1. To install, reverse the removal procedure.

Jul 02, 2010 | 2000 Mercury Grand Marquis

1 Answer

92' grand marquis, 140,000 miles, 4.6 ltr., 2 overhd cam. smokes after idol but not when first started or after sitting for any length of time.???


piston rings are worn. do an oil change and substitute 1 qt of oil with 1 qt of lucas oil treatment. when the engine heats up the oil thins and gets past the rings and combusts along with the fuel. the fix i recommended will only reduce the sympyoms and confirm the rings are worn. you'll need a ring job to fix.

Mar 12, 2010 | 1992 Mercury Grand Marquis

1 Answer

Thermostat wont fit currectly using gasket supplied with thermostat-tried O ring-over thermostat leak was visible what do I do?


Hi:
With no thermostat, the thermostat housing should sit flush against the engine mount surface. The outer diameter of the thermostat should drop down into the recess provided and not even interfere with the gasket. Make sure both sides are clean , and all residue is removed. IF the thermostat will not fit into the recess provided, then take your thermostat housing to the place you bought your new thermostat, and have them fit your new one to your housing.

Dec 08, 2009 | 2000 Mercury Grand Marquis

1 Answer

Temperature sensor 2000 Mecury Grand Marquis


Make sure that is the sensor. That should be your oil pressure sensor. Follow the top radiator hose to the thermostat look closest to that for the wire going to the sensor. This should be the temp sensor. Good luck

Mar 20, 2009 | 2000 Mercury Grand Marquis

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