The car is over heating after it has been running for 10 mins, we have serviced the radiator, changed the thermostat and the fan belt, and it still seems to be over heating. If yu have any ideas, that would be great. Cheers
Check to see if the lower radiator hose is collapsing, if not then take the fan belt off and check for slop in the water pump. Somethimes the pump can go bad and not leak. let me know if this works out for you.
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high speed overheating are a good indication. something is wrong with radiator. check coolant level, make sure the fans are working, and check radiator for broken fins or dirt and debris in radiator fins. if air is not going through radiator, it will over heat. if all is fine. replace radiator cap to see if this fixes problem. but check radiator fins first for debris.
Did you recheck the water level at the radiator filler cap after the engine was at normal temperature (ie after about 15 mins idling with heater control on full and fan on Low) because it sounds like there is an air lock in the system. Air lock should clear after thermostat starts to open. This is indicated by the top radiator hose becoming hot to touch.
Obviously the engine is overheating.
Could be a struck thermostat --- that would show up within about 5-10 mins. of running in the driveway in neutral. You did put a new thermostat with the head work ? Did you bleed out the cooling system when filling????.
Or is it steaming when driving under load.????
If that is the case than you may have a compleatly plugged up radiator--- which would have to be replaced.
Sounds like you have coolant leak if you are loosing coolant or a bad thermostat. I would replace the thermostat, they run about $10. The other fan is an aux fan and will only run when the a/c unit is on.
did you guys flush the coolant system and make sure there wasnt any corosine in the radiator, plus on some of those models you have to make sure that all of the air bubbles are out of the system or it get almost like vapor locked and the water wont flow throught the system,, also check the heater core try by passing it and running the motor you might have a plugged heater core also ,,,
Are you using a TOYOTA thermostat? The OEM 'stats have what we refer to as a "wiggle valve", and the 'stat should be inserted with this valve point straight up to 12 o'clock. This allows air to be purged from the cooling system. If everything is good, you may just have a "air blockage"; the system will not pump air in the cooling jacket, the water pump will just cavitate the air, resulting in your overheat condition...