Sorry to ask this again, but i searched and didn't find anything that was exact. I have tried A LOT of the methods in many of the replies, but none have worked!
Pretty much EVERYTHING has been replaced: Water pump, fan clutch, upper and lower hoses, Radiator, thermostat. Now the car WAS overheating at idle, but once i replaced the fan clutch, that fixed that. Now i believe i have an air bubble in the system. Been trying to bleed it. What is the best way of doing this. I keep topping off the Radiator, but after a drive, and it overheating, i noticed that the resevoir tank is over flowing. It was only at Max. So no matter how much i add, it's like the system just throws it in there. Any ideas??? Thanks for the help!
BTW I have a 1995 240sx SE!
Overheating...a little different!
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Und3rprshUr
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to bleed the air try running the car with cap of at idle till it reaches temperature and or water start over flowing. this can do it some times. other itmes you need to find the bleed screw for the coolant ( if your car has one) and make sure your parked level as the air bleed must be higher than the radiator cap.
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JT_MONEY_2004
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- Car: 1990 Q45, Pearl
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Und3rprshUr
- Posts: 570
- Joined: Sat Oct 19, 2002 5:53 am
- Car: My 300Z
OK, now the other day my aftermarket fan flutch slpit itself open, and i replaced it. The car still over heats at idle, and when i take the RPMs to 4000 it'll cool back down. I know i've heard of problems with aftermarket thermostats, but does anyone know of problems with aftermarket fan clutches or waterpumps. Cuase i think one of those are malfunctioning.
I thought about the Head gasket, but what are some more signs of the head gasket blowing???
Also what would cause my radiator resevoir to completley overflow??
I thought about the Head gasket, but what are some more signs of the head gasket blowing???
Also what would cause my radiator resevoir to completley overflow??
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Und3rprshUr
- Posts: 570
- Joined: Sat Oct 19, 2002 5:53 am
- Car: My 300Z
Temporary wrote:OK, now the other day my aftermarket fan flutch slpit itself open, and i replaced it. The car still over heats at idle, and when i take the RPMs to 4000 it'll cool back down. I know i've heard of problems with aftermarket thermostats, but does anyone know of problems with aftermarket fan clutches or waterpumps. Cuase i think one of those are malfunctioning.
I thought about the Head gasket, but what are some more signs of the head gasket blowing???
Also what would cause my radiator resevoir to completley overflow??
Quote »The car still over heats at idle, and when i take the RPMs to 4000 it'll cool back down[/quote]
This is because your moving the water with the pump at a faster rate. which means your pump is fine.
i doubt its head gasket or it would always overheat never coolign down.
radiator resivor will completely over flow if your cap is bad.
go buy a new cap 5 $ and it cancells out that possibility.
the bad cap can also cause it to overheat by lowering the pressure, and therefore the boiling point of the coolant
now, it does not overheat when driving, correct?
how hot is it getting?
and if you havent allready, bleed the system with the bleed plug, located on the intake manifold infront of the fuel injectors, unscrew it, pour coolant into the radiator, and when it overflows from the bleed plug hole, then screw the plug back in, top it off, and you should be good
now, it does not overheat when driving, correct?
how hot is it getting?
and if you havent allready, bleed the system with the bleed plug, located on the intake manifold infront of the fuel injectors, unscrew it, pour coolant into the radiator, and when it overflows from the bleed plug hole, then screw the plug back in, top it off, and you should be good
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psychic_mechanic
- Posts: 296
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- Car: the world's ugliest civic
Random ideas to all cars, may not apply to 240's:
Fan shrouds/airflow through rad, not aroundare fans working together or fighting each other?clogged cooling passages in head/blockverify gauge is accurateradiator capset timing to stock, just to checkchemical flush cooling systemwater wetterrunning lean?
Fan shrouds/airflow through rad, not aroundare fans working together or fighting each other?clogged cooling passages in head/blockverify gauge is accurateradiator capset timing to stock, just to checkchemical flush cooling systemwater wetterrunning lean?
I replaced the cap last night. It still overheats. The only time it pushes coolant back to my radiator is when it over heats, aslong as it runs normal, no overflow. It gets hot when i am driving or sitting. And if i let it, it will go WAY past the "H" on the gauge. When i bring the RPMs to 4000 it cools down really quick.
On a side note: If it still is the Fan Clutch, do you guys think taking out the clutch fan, and adding another electric fan would be a good idea. Like gett a dual electric out of a Altima or something???
Thanks for your guys' input!
On a side note: If it still is the Fan Clutch, do you guys think taking out the clutch fan, and adding another electric fan would be a good idea. Like gett a dual electric out of a Altima or something???
Thanks for your guys' input!
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Und3rprshUr
- Posts: 570
- Joined: Sat Oct 19, 2002 5:53 am
- Car: My 300Z