Question about 2000 Nissan Maxima

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2000 Maxima overheating

I have removed the thermostat and replace the water pump and flush the radiator. Still overheatng. I have not Burp the system yet. Any idea?

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  • mexran1 Aug 30, 2008

    Yes. The fans kick on. Thanks for your respond.

  • msguy601 Sep 12, 2008

    I have the exact same OVERHEATING problem. I have also noticed that the car reaches the normal operating temp. and does not overheat UNLESS the air is on. The fans run when the air is on and also come on automatically when the air is off after the car reaches operating temp. This has also caused my car to not shift properly. PLEASE HELP!

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When you engine reaches temp do the radiator fan/s kick on?

Posted on Aug 30, 2008

  • paul828phill May 08, 2012

    Just one fan might kick on. But niether fan kicks on when I turn car off

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You will need to replace the radiator. You can flush the radiator, but the water will only run through certain coils (this is the part of the radiator that is used when car is in idle). When your car is running at highway speeds it runs another route through the radiator (cannot flush this part unless you pressurize it, still not sure you will flush it out). What all this is saying is you have a blockage in your coil caused from build-up of residue. Sorry to say but its best to replace the radiator than try to flush it out and have it happen again later.

You should be able to run your a/c when your car is in idle, but highway speeds will make your car run hot. Let me know if this helps.

Posted on Oct 01, 2008

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Does anybody have a video link on how to flush the cooling system on a GM 3.1L SFI OHV 6cyl motor? I need a vid for this particular motor cause mine is still overheating & i have looked everywhere.


flushing a cooling system is the same method as any other motor

do it without the thermostat fitted
or water pump opening

sacrifice an old radiator hose to adapt a garden hose fitting
for radiator flush

air in system fix
your thermostat housing has no air bleed valve
no top radiator cap

old school way
heater on full
run motor till thermostats fully open
burp radiator hoses
wait till water is running up into over flow bottle without bubble
replace cap
turn off heater
correct level in over flow bottle

why still over heating
you fitted everything i would have ... yet still overheat
possibles
leaking inlet manifold gaskets
hose clamps loose
cooling fans spinning too slow
thermostatic fan switch faulty
aluminum radiator is a big one
air ..fins bent or some water channels blocked

or possible head gasket leak




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Nov 02, 2016 | Cars & Trucks

1 Answer

Will an air pocket in the coolant system cause it to overheat or over pressurize on a 2001 Nissan Sentra ?


1. The radiator cap if working correctly it will release pressure in the system provided the cap you have is the correct pressure setting. If you are having a problem with pressure then replace the cap with a new radiator cap with the correct pressure setting. Do not use a cap with a pressure setting other than the original equipment pressure spec. So you do not go to the parts store and buy any radiator cap on the shelf that fits because they come with different pressure ratings and some of these will be totally unsuitable for your car.

2. If the pressure valve is stuck in the "old" cap the pressure release system will not work.

3. Overheating
Air pockets in the cooling system can definitely cause overheating and can retard coolant flow through the system. If you are draining the radiator to replace the coolant or replacing the radiator you need to follow the correct procedures for bleeding air out of the system for that particular engine after coolant refilling. Some engines have bleeder screws on the cooling system to assist in the air bleeding procedure and some don't.

There are various causes for overheating so don't assume it will necessarily be solved by bleeding any remaining air from the cooling system and replacing the radiator cap with one that works.

Other causes can be...........
1. Faulty cooling system thermostat. (Replace the Thermostat)
2. Faulty water pump, especially if the impellers have corroded away or have disintegrated in the case of those design genius water pumps with plastic impellers. (Replace the water pump)

3. Cooling fans not working and if so the cause needs to be tracked. Check that your fans are kicking in. If the engine is overheating the fans should be running because they will switch on when the coolant reaches a specific temp and well before the coolant gets excessively hot.

4. A partial blockage in the coolant passages inside the engine but not in the radiator if you have a new one. If the coolant is not changed at the required intervals(frequently the case with many owners) or is over diluted with water you can get a build up of debris. If products like stop leak have been used in the system this can create similar problems with partial blockages inside the engine coolant passages.

5. A compression leak into the cooling system.
If you have bled air from the system and have continuous air bubbles in the cooling system I would suspect a compression leak. In that event a basic leak down test will show if you have compression gasses leaking into the cooling system and from which cylinder(s). The spark plug is removed and compressed air is forced into the cylinder via the spark plug fitting and air bubbles will show up in the coolant of there is a leak into the cooling system.
--------------------------------
Have the problem with overheating addressed immediately. Running the engine with an overheat condition will cause expensive engine damage many times the cost of fixing the overheating issue.

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Dec 29, 2015 | Nissan Cars & Trucks

2 Answers

My 2000 mercury sable is over heating after I've replaced my radiator water pump and thermostat after replacing both cooling sensors the fans stopped working


Open the radiator cap with the engine running at temp and look for tiny air bubbles. If you see bubbles you have a blown head gasket.

Dec 14, 2010 | 2000 Mercury Sable

1 Answer

I have a 2000 nissan maxima and just recently i noticed it was running hot. so i took it to my mechanic and he advised i needed a new water pump. so he replaced the water pump and he is saying it is still...


hot engine usually due to clogged radiator or bad thermostat. Take out the thermostat and make sure it is opening fully in boiling water.
Look inside your radiator for signs of clogging. If yes, professionally flush or replace radiator.

Aug 22, 2010 | 2000 Nissan Maxima

3 Answers

1998 nissna maxima , with radiator replacement car continues to overheat, with low to no heat


First, make sure engine is warmed up, then feel the top of the radiator hose, is it hot ?, if not then you may have a bad thermostat, replace with a 195 dgree, or you could have a bad head gasket.
Let me know what you find.

Feb 06, 2010 | 1998 Nissan Maxima

1 Answer

Engine light comes on and says engine overheating


Could be three things: Hopefully the first...
1. radiator fan not blowing. (most likely)
2. Radiator clogged (not likely)
3. Head gasket blown... (very possible)

If #1, system cannot detect fan not blowing. It may be the fuse or the relay switch, disconnecetd wire at fan, or burned-out fan motor.
If #2, Flush radiator
If #3, you will see WHITE smoke out the tailpipe and excessive water drops.
Your new oil will have a "milky" look (check the oil dipstick). That is water.
When engine is COLD, remove radiator cap and start car. You will notice high-pressure "bubbles" squirt out of the radiator, even before the engine warms up.

I hope it is #1. and that this is helpful.



Sep 08, 2009 | 2006 Chevrolet Impala

1 Answer

Overheating 2001 pontiac aztek


remove coolant.remove thermostat remove bottom radiator hose to water pump.put a empty container under the radiator.take a water hose put it where thermostat goes flush out the rust in block.watch the water as it come out the water pump .if stream water is small keep flushing until you get a study sream of clear water. also flush out radiator. lower water pressure dont flush radiator it with high water pressure you could burst it. make clean the over flow jug .make sure it not stopped up.put in a new thermostat and radiator pressure cap. fill radiator with half antifreeze and half water.bleed the coolant system.

Apr 05, 2009 | 2001 Pontiac Aztek

2 Answers

Engine overheating


The best way to flush it would be to take off the bottom radiator hose and pump water through the fill nozzle after all the coolent is out you can then hook the hose back up and replace it with new coolant.

Feb 01, 2009 | 2000 Pontiac Grand Am GT

1 Answer

Overheating


Hi,

Based on your description "hard line from thermastat area has a heat wraparound it goes towards firewall", that would appear to be part of the heater system for the inside of the vehicle and would not affect the overheating of the engine.

Most engine overheating could be caused by:
  • insufficient coolant in the radiator or reservoir;
  • defective (stuck) thermostat;
  • too soft radiator hoses (upper/lower);
  • water pump, belt, tensioner;
  • clogged radiator;
  • radiator fan motor, clutch (if has got one), relay.
Additionally, in a large number of vehicles, the radiator fan motor would only work the A/C or heater is ON.

Corrective action would require determining which is the culprit, pls try:
  • remove the thermostat completely out and test drive, see if the overheating comes back, if yes, then it is not the thermostat, if no then the thermostat most likely is stuck closed and would need replacement;
  • on start from a cold engine, remove the radiator cap and pls check if the water flows when the engine is revved. If yes, water pump is working, if not, water pump is defective;
  • in a closed loop cooling system such as in your car, there is a possibility that the radiator hoses might have thinned down or gotten softer. This could be checked by revving the engine while looking over the hoses, there should be apparent sagging or reduction in diameter when the engine is revved. If any, then they are too soft and would need replacement;
  • clogged radiators could be flushed/cleaned by removing the drain plug at the bottom.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Aug 08, 2008 | 2000 Chevrolet Silverado 1500

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