i have a 90 supra with a 1jz, this is a long story . first of i had the head re done because off the valve seals leaking at the same time i had the 2jz cams installed the lower end was re done new piston rings and bearing. i re installed the motor and ever since then it over heats. i replaced the water pump the thermostat still over heating replaced radiator , by pass the heater core and still over heated. i removed the head and had the shop that re built the head re check it and they found nothing. re installed the head and the car still over heats. there is no coolant in the oil and its not leaking. i airlift the coolant system and still nothing. i check the coolant level everytime the level is low. i just have no idea were to go from here
1jz overheating !!!!!
- Thread starter SUPRA721
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kneedragger85;1752746 said:
I'm not running a shroud, no overheating here.
OP, what fan set-up are you running?
When does the car overheat? only while idling, only accel, cruising? etc.
Sam
I would actually suspect the turbo's....as they are watercooled and gets damn hot some times. But in reality you must have a circualtion-problem with a serious blockage somwhere. i'd recomend that you might take your waterpump off, and somehow flush the cylinderblock and head with water in the oposite way of the Normal flowdirection. By doing so with every complex componet in the cooling-system; Any debree blockage will probably come out easily... and of course, everything should be flowing easily through the engine, if not, there's your blockage.
When that's said, Have you done a cylinder lekage test? That will also give you alots of answers. A good friend of mine had a huge leak in one cylinder on his V8 marine-engine earlier this year, and the conclusion was a cracked cylinderblock due to not draining the engine for coolant (ie, just water) when the winter kicked in...
When that's said, Have you done a cylinder lekage test? That will also give you alots of answers. A good friend of mine had a huge leak in one cylinder on his V8 marine-engine earlier this year, and the conclusion was a cracked cylinderblock due to not draining the engine for coolant (ie, just water) when the winter kicked in...
Hmm, all instruments show overheat, but no coolant is leaking!? Thats not posible, your overflow reservioar should sound like a boiler with such high temparatures. Pressure will exeed a certian limit (depends on rad cap pressurerating) and steam/coolant will open the Radiator-cap and make a significant dump into the coolant-reservioar.
I suppose the air blowing through the radiator gets pretty hot? It's a silly question, I know
Anyway, the leakage-test will probably give you some good answers Good luck!
I suppose the air blowing through the radiator gets pretty hot? It's a silly question, I know
Anyway, the leakage-test will probably give you some good answers
Good luck!