Question about 1990 Subaru Loyale

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1990 subaru legacy

My 1990 Subaru Legacy is running hot. We have replaced the water pump, radiator, thermostat, head gasket, radiator cap and the fans are working. What else could be wrong? Could the release valve on the top of the radiator be bad? It doesn't seem to tighten? My Subaru Loyale is also over heating after a cooling system refit. The over heating occurs after the water level drops, and a leak can't be located. There is a gurgling sound in the heater box when the motor is revved. What could this mean?

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I hope this helps : A lot of people, even mechanics overlook the dramatic effects of "air lock" as described above. This is especially prominent in BMW's because they seem more "picky". Your cooling system (every cooling system) is balanced just well enough to nearly always keep your engine cool when operating properly. Sometimes a pocket of air does become trapped at one of the higher points ion the system however. This air pocket acts like a blanket trapping heat in the one dry area, in addition to impeding air flow. I would start WITH THE ENGINE COLD, by adding a radiator flush tee in to the heater hose leading to the intake. Start the car with the flush cap off, and the radiator cap. Play with the hoses and try to keep this tee higher than the fill cap on the radiator, to let out any air. When water is seen at the tee, cap it off and fill the radiator all the way, with the engine running, as to fill the entire block. Keep in mind that with the engine running, you kind of need to hurry. In only a few minutes, the water will get hot enough to start spewing from the open radiator (don't worry you have plenty of time, assuming it's all the way cooled down) I have seen many people leave their radiator half full, because it takes some time for the water to trickle all the way down through the runners on the radiator, and it looks full even though there is "air" (it's technically hydraulic pressure, like a siphon) holding it up. Hope fully that is the problem. You already re- did the whole system. Check your igniton timing too. Sometimes that can contribute to an overheat as well.

Posted on Dec 17, 2009

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Try another radiator cap or could be cracked head .

Posted on Feb 15, 2009

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The gurgling sound sounds like it is air locked .if you have a good heat on defrost then its probly not airlocked if the air blowing is cold then thats where your problem lies.if its blowing hot air then its probably not airlocked then the problem could be a crack in the head.unless it was pressure checked it could be almost impossible to find when you had the head off.it could have just a hairline crack in it and you not even see it. i hope this helps and its not your head.you have elemanated alot of problems it could have been.if i was betting it would be one of the two problems i have just described thanks jeff

Posted on Nov 30, 2008

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