Question about 1996 Mercury Grand Marquis

2 Answers

1986 mercury grand marquis LS overheating

My 1986 grand marquis seems to overheat after you run it down the highway for a while. The radiator was overflowing into the plastic tank which was squirting water out too. It doesn't seem to have a whoal lot of pick up and the engine started cutting out. I'm trying to sell it, and don't know where to start on fixing it. also, it's been sitting for 8 years.

Posted by on

  • 1 more comment 
  • aubrey12 Aug 13, 2008

    This car was given to me, and the lady said she replaced the radiator before it was parked for eight years. I just replaced the fuel tank, fuel pump, fuel filter, engine oil and filter, and the transmission fluid looks clean. I had the head off and replaced some of the coolant hoses because they were squirting out coolant. I also replaced the throttle body gasket. The engine is a 302 v8 5.0L and is fuel injected. sorry I didn't include all this info before.

  • aubrey12 Aug 13, 2008

    I just replaced the thermostat today and drained the radiator - the water looked pretty brown. I put new water in the radiator and started it with the radiator cap off and after the engine warmed up, it sucked the water into the engine so i added more water to it. does that mean it's pumping correctly? I'm also thinking that the reason it doesn't seem to have a lot of pick up is because the fuel injectors are dirty. do I have to replace them or is their a way I can clean them? I don't really want to take the car in to have the system flushed because the car is only worth about $700 and I have $500 in it. is their a way I can flush it myself?

  • aubrey12 Aug 23, 2008

    thanks for all the help. I replaced the thermostat and flushed the radiater and it quit overheating. It still doesn't have a lot of power but I think its just because its old and has 186,000 miles.

    Thanks Again

×

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 1,056 Answers

Sounds like the thermostat is stuck closed.
If the car is overheating, they will also hurt perfomance.

But after sitting 8 yrs, it's hard to say what else might be wrong.
Was it just sitting, and you threw some gas in it to get it running? Or did you go through the car first to do some maintenance? Like an oil change, flush the gast tank and carb and put in all fresh. Change the fuel filter? and the list goes on. A car sitting that long can develope some problems just from sitting. If you could list what you have and haven't done to the car before this would help.

Posted on Aug 11, 2008

  • 1 more comment 
  • Coss Aug 13, 2008

    Wow, you did do a lot of really good prep work.



    So back to the original problem.

    The lack of power probably directly related to the overheating.



    Even though she said she replace the radiator, doesn't mean it didn't have time to gather junk in it.



    I would replace the thermostat, take it in, and have the radiator flushed (actually, if you can find a place that will do it, do a complete cooling system flush, not all places do). You might also talk to them about replacing the thermostat for you, so that it can be taken out, flushed, and then put the new one in, and filled and purged (just like brakes, you don't want air in the system.

    And I would look more towards a full service shop to do this, not the local quick lube.



    From there, I would look at a bad water pump. If the pump isn't moving enough volume, it will cause it to overheat.



    Let us know what you find.

  • Coss Aug 13, 2008

    Yes, there is a do it yourself flush kit (at least there used to be, haven't looked for one for a while).

    It was a T fitting you would splice into your heater hose. You hook your garden hose up to it, and let it flush the system. I think it was Prestone that made them.



    You can clean the injectors. They had a couple of different kits for doing it. Here again, trip to the local parts store to see what they have.



    Yes, if you see it moving water through the system, the water pump is probably good (won't give it 100%, but OK).

    Hold the fan, and if you can "rock it side to side", more then just a hair movement could mean the bearings are going out.



    Agreed, if you are just going to sell it, I would do just basic fixes. But be up front with who ever you sell it to, and list the work you have done. But don't warranty it past waving good bye.

  • Coss Aug 23, 2008

    You're very welcome.

    And thanks for the rating on the answer.



    Agreed, something that has 186K on the clock is not going to be burning the tires off at the local dragstrip.



    Your plan about selling it, is probably the best thing you can do.



    Have a great weekend.

×

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 15 Answers

Any car sitting that long is going to have some issues. It could be several things. The thermostat could be stuck closed. The radiator could be stopped up. The fan clutch could be inoperative. The waterpump impellar could be deteriorated to the point that it will not circulate coolant. The worst would be that a head gasket could be bad and causing to overheat and misfire. The first thing to do is replace the thermostat and purge any air from the system. Use water and not coolant to verify the repair. If this solves your issue you can drain the water and fill with proper amount of coolant. I must recommend checking for white cloudy smoke from the tailpipe as it is a sure fire sign of a blown headgasket.

Posted on Aug 11, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Engine Overheating


no other signs just the dash gauge, upset? what if its fibbing?
no steam, no water to ground overflowing overflow tank.
no engine pinging. no lost power, from engine, SIGNS. are key. here.
Did you consider using a IR pyro gun for $20 and find if it is really overheating,? the gun also finds clogged rad tubes, childs play like.
are you loosing coolant. that is when cold actually off the cap
and look down deep in the RAD tank? This matters, most.

which engine,? 2.5,4L or bigger?
what does no coolant going into...., mean.?
it's a loop system.
first off, we need to know does it overheat only parked?
or can you drive it from cold and keep it going and it never overheats
moving fast.?
if the engine stays cool 180F, moving fast , then your stop. and NOW it it overheats, that means the fan is dead.
or a marginal radiator, (Pyro gun to rescue)

Mar 24, 2014 | 1994 Jeep Grand Cherokee

1 Answer

Dodge neon overheating


I would be thinking radiator or water pump. When the engine is warmed up and the upper hose is hot, feel the lower radiator hose. It should be hot too, just a little cooler than the upper hose. If there is some blockage in the radiator, the lower hose may feel cold or just lukewarm.
Even though the water pump doesn't leak, the impellers may be made of plastic and have considerable wear. That would restrict circulation.
The heater core should not be an issue. Heater cores do not cause overheating even when totally plugged up.

Jul 03, 2013 | Cars & Trucks

1 Answer

I have a 1986 Corvette Coupe. It overheated today when I sat through 5 or 6 lights or 20 minutes.. Smoke came out of the hood. The coolant overflow sprayed out radiator fluid I think. The temp went to 291....


Let it run for about 10-15 minutes after it cools down. After the 10-15 minutes (but don't let it overheat) squeeze the top hose to see it it's hard. If it is, it's probably the thermostat, and the coolant isn't flowing through the engine to the radiator. It's just staying in the engine and getting hot.

Sep 10, 2011 | 1986 Chevrolet Corvette

1 Answer

My car runs good at idle but overheats when i get on the highway.i have flushed it and put a new thermostat but still water overflows from my cap on the overflow tank,could it be my cap


Sounds like the head gasket is blown and pushing the coolant out of the radiator. Here is an article that will help you find out the real cause, though.
How to diagnose an overheating engine
Hope it helps!

Dec 05, 2010 | 1996 Ford Contour

1 Answer

I may have added too much coolant. After adding it, I drove for about 15 minutes. A few hours later, the tempurature gauge light came on. I check the coolant level again and there was nothing in the...


No, you can't add too much coolant. Rather, it does not hurt anything if you do. Did you add it to the radiator, or to the overflow tank?

Let it cool, then remove the radiator cap, and if needed, add coolant to the radiator. Put the cap back on, and fill the overflow tank to the "full - cold" line. Start it and run it a few minutes and look for leaks. If you find no leaks, drive it for a day or two, then let it cool and check it again. If it is down a lot (without overheating), you have a leak somewhere. If you lose enough coolant, that will make it overheat. However, if it overheats, that can cause loss of coolant, when you stop the car, you will see steam and smell coolant, and often hear it boiling.

If it overheats again, make note of when it happens: driving on the highway, or stop-and-go around town. Overheating on the highway usually indicates a clogged radiator, while in-town overheating usually indicates a bad cooling fan (you don't need the fan above about 30 MPH). A bad fan is usually the fan relay, but it can be the fan thermostat (different from the engine thermostat), or a bad fan motor.

Oct 10, 2010 | 1999 Chevrolet Malibu

2 Answers

1999 buick centry overheating overflowing the overflow


Until you get it figured out use regular water. Replace thermostat and radiator/coolant tank caps. Thermostat regulates pressure in the motor and allows radiator to cool. Caps regulate atmosperic pressure. Either or both being bad will cause you system to siphon and fail.

May 01, 2010 | 1999 Buick Century

1 Answer

Going thru coolant like crazy but theres no leak. we done so much so far. we put a water pump in and a therpasat in and sencer in and intake gaskets


Well first off, since you have replaced many parts, perhaps you have air in the system. Also check the oil to see if it looks like chocolate milk or is extremely high (indicating a blown head gasket).
While system is cold, add coolant to the radiator (if applicable) and the coolant tank. Then start the vehicle and turn the heater on high heat - full blast. Let run for 15 minutes or until the engine begins to overheat or the coolant tank become empty. Let the vehicle cool down (30 minutes) then repeat until it coolant level doesn't drop or engine doesn't overheat.
Now go for a test drive for about 10 - 15 miles make sure to take hills and highway/freeway. Let vehicle cool down and recheck coolant tank and radiator. If level has gone down then something is wrong. Perhaps the thermostat is in backwards.

Jan 06, 2010 | 2003 Pontiac Grand Am

2 Answers

Running hot all water going straight to overflow tank


Check the thermostat. If the upper hose does not feel very hot to the touch when the car is warmed up already, this indicates the thermostat is not opening, and therefore the water cannot circulate causing the overheating problem. Second possiblity is the radiator fan. If the car tends to overheat only on city driving it is a the radiator fan not coming on. This is either due to a bad radiator fan, blown fuse,bad relay, or a bad temperature sensor or temperature switch. If the car tends to overheat at highway speed, then it is the radiator being clogged up, and not letting enough water circulation when demand is at its highest which is high engine rpm.

Nov 11, 2009 | 2003 Dodge Neon

Not finding what you are looking for?
1996 Mercury Grand Marquis Logo

619 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercury Experts

yadayada
yadayada

Level 3 Expert

70365 Answers

Ron Lankford

Level 3 Expert

5386 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22041 Answers

Are you a Mercury Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...