My 96 nissan micr is over haething even when its not being drivin it heats up in a couple of minutes.?
Answers:
Could be:
Blown head gasket
Cracked head
Plugged water ports
Loose pump drive belt
Timing is off
Electric fan doesn't work
Thermostat installed upside down.
run it into the river too
have you checked the amount of coolant?
You have a cooling fan that operates only when the car temperature reaches a certain degree. Check to see if it ever comes on. Idling will make it come on the fastest. IF it doesn't then either the fan motor is bad or the temperature sensor is bad.Also possibly it could be just the fuse.
if you find that the coolant is being blown out a the expansion bottle i would suspect the head gasket
Have you checked the ignition timing and fuel mixture ? Are you getting oil in the coolant or bubbles in the coolant, if so the head gasket could have gone. have you bled the cooling system as per the manufacturers instructions.
carthere was a thermostatic switch on my car that the fan was plugged into. The fan was supposed to cut in at 98 C but through wear abd tear began cutting in later at about 92 C. It can be tested by putting it in circuit with a torch bulb and placing the switch in a pan of boiling water
check the oil filler cap if u have creamy stuff there the head gasket is broken
did you bleed the cooling system after you changed the water pump?if it has air in the system it will make it do all sorts of thing,failing that i would say headgasket
If the oil is a white milky colour you have a head fracture. Try putting a flushing aid through the engine, cause it sounds like the coolant isn't reaching the engine at all so you may have a blockage. The radiator doesn't sound like the problem, as if it overheats from cold in a couple of minutes it is being caused by not actually being cooled. If you haven't changed the thermostat take it out completly. If the engine stays stone cold then this obviously is the problem.
check timing, check fan belt, check radiator and may have hairline crack in the cylinder head
Since you've done all that- what about the heater core.
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