Question about 2004 Isuzu Rodeo

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2004 rodeo 3.2 engine keeps spitting up antifreeze thru the overflow bottle and is over heating i have no leaks in the system replaced water pump, radiator, thermostat and not losing coolant thru the exhaust nor is it in the oil. i can drive at freeway speeds without issue. one strange thing that happens is when i shut the engine off and restart after warming it always overheats. also when the temp gauge is reading hot the a/c goes warm and the heat goes cool. this symptom happens whether i run the car with or without a thermostat in the engine.... any thoughts?

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  • Expert
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It sounds like you may have a leaking head gasket or cracked head. I would suggest you do a compression test.

Posted on Jul 28, 2009

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Check your viscus fan hub working correctly and radiator cap holds pressure to rating on cap
air cond is shut off by engine ECU due to engine temp. too high to aid in cooling quickly.
is thermo fan on front of radiator working when air cond on?
or if fitted with electric fan on inside (engine bay side) is this working correctly?
the wost posibility is block cylinder liners distorted from over heating previously causing leakage when warm then it over heats/spits out antifreeze due to combustion pressure leaking into cooling system can check with T.K. head check tool to confirm then possibly new short block/engine
have seen this several times on vehicles with overheating history.

Posted on Jul 28, 2009

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1 Answer

Ive been putting water n my car due to small radiator leak water froze n overflow bottle n also froze n all the holes car won't start due to the ice wat can I do to melt ice n holes


Get the car towed to a garage that has heat and allow the water to thaw out. Then, drain the cooling system since there is too much water and not enough antifreeze in it. Now is a good time to repair/replace the leaking radiator. Refill and bleed the cooling system with a 50/50 mix of water and antifreeze. If you don't repair the radiator, keep some 50/50 mix available for topping off to prevent freeze-ups in future.

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After engine has cooled, put water in the radiator if you can, not the overflow bottle.
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My coolant is leaking and its a big possibility it might be the water pupm or radiator but i think its just a hole in the container that holds the coolant, is ok if i put water in there constant to keep...


Stop leak is a temporary solution and never a long term fix. You need to locate the source of the leak and replace the faulty part. I also doubt that the coolant overflow reservoir is leaking unless something has been done to the vehicle to damage it.

Using water rather than the correct spec coolant mix as a top up is NOT recommended (even for a short period) because, among other things, the coolant mix provides lubrication for the water pump. Constantly adding water rather than the correct coolant mix dilutes the coolant mix and it becomes ineffective.

Your engine needs an efficient cooling system to survive so have the leak investigated and fixed saspo.
If you allow the engine to overheat you will cause very expensive engine damage and end up with a car you will not be able to drive. It is always cheaper to fix the problem.

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Why is the car leaking antifreeze?vehicle leaking antifreeze and i do not know why, from where?


First check hoses and water pump while car is hot and running. If you find nothing then let car cool down and fill overflow container. Get engine hot again. When engine is hot turn off car and check the overflow tube coming out of the overflow tank. If it is spitting antifreeze then you have air in the system. Bleed system by opening the 7mm bleeder. You may have to do this a few times until all air is out of the system and overflow stops spitting antifreeze.

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No heat is often a symptom of low coolant, usually followed by overheat. There are other controls that regulate heater, but right now, re-fill the cooling system with engine running and heater on high, then check for leaks (coolant you lost went somewhere...you need to determine where) Low coolant will damage your engine. Take care of that first, then if heater still does not work, then do diagnosis on that. (if you loose the engine heat won't matter, will it!)

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If the water tends to keep going down then there has to be a leak somewhere. Try also looking at the hose coming from the overflow tank and see if the hose might be kinked. You might also be blowing antifreeze out the tailpipe. Take a look and if there is bluish white smoke then you have confirmed that theory,

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1 Answer

Overheating


bad water pump or cracked plastic radiator

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