Question about 1998 Subaru Legacy

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I am having overheating issues with my 1998 subaru legacy 2.5. i replaced the thermostat and put new coolant in and it overheats now. what could be wrong?

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  • howardk238 Sep 05, 2009

    how would i go about getting the air lock out of the system?

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You need to make sure that there is no air within the cooling system as an air lock could cause this problem,so a proper bleeding is required.If this does not solve your problem then your radiator may be blocked and you may need changing it.Also watch the temp gauge as if it does not exceed half way through then you could disregard this overheating..but as a rule,once it exceeds half then the fan should start automatically else you have a thermostat problem..Hope this helps..

Posted on Sep 05, 2009

  • heeman mohun Sep 05, 2009

    Top up water in the radiator to full and start engine and allow it to run..let it warm up and watch air bubbles coming out through the water..then slowly add water to it and see it will seems it is absorbing it..Continue until you notice no more water can be top up..Do not allow engine to heat up first as this can be dangerous...

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1 Answer

Overheating


You'll need more info to proceed.
When does it happen, how long after you start driving, what have you checked or replaced so far, etc.
Could be a long list of things including the thermostat or the radiator fan. Or even low on coolant.

Sep 15, 2012 | 1995 Subaru Legacy

2 Answers

1990 subaru legacy- overheats, I"ve


Most likely you put the thesmostat in upsid down. Good luck

Aug 17, 2011 | 1990 Subaru Legacy

1 Answer

The car is over heating i put new thermostat


On my 1998 subaru legacy outback limited I replaced the thermostat and did a radiator flush and fill and it overheated when I tested it. It basically overheated because there was air in the system. I relieved it by running the car and partially unscrewing the black plastic relief screw on the top left of the radiator(looking at it from the front of the car) until it stopped hissing and fluid started coming out then I screwed it back tight and I've never had a problem since. I think subarus are pretty fussy with this because my mechanic even missed it when they did the head gaskets.

Feb 06, 2011 | 1998 Subaru Legacy

1 Answer

1996 Legacy Overheating It has coolant and both fans are working. Overheats after about 10 min of driving. Checked oil was a little low put 1 liter in. Radiator has pressure, opened when hot and coolant...


Costs nothing to try this, just in case coolant level was low when or after bottle changed, and you got an airlock. Start car when cold, rad cap off and heater on. Now let in run until it comes up to normal operating temperatures and rad fan(s) kick on and off, 2 or 3 times, and add coolant to proper level in rad if it goes down during process. Then after that, put rad cap back on, fill coolant return bottle to proper level and try it. Quite often when re-filling an engine cooling system, people forget to turn on heater to get coolant circulating through the heater core.

Nov 06, 2010 | 1996 Subaru Legacy

1 Answer

Overheats replaced water pump and thermostat no combustion gases found 1997 legacy 2-5 liter


We just did the same car with the same prob. The block was cracked and was pressurizing the cooling system causing the thermostat not to open. Remove your thermostat and run the car if it doesn't overheat you need a motor. Ours didn't show any hydrocarbons in the coolant either, so try the simple

Dec 14, 2009 | 1997 Subaru Legacy

2 Answers

1990 SUBARU OVERHEATS WHILE DRIVING


1990 Subaru overheating condition.

The entire cooling system needs to be checked.

1. If the coolant level is fine - and low coolant level in your cooling system is not the problem - you need to investigate further.(see 2 below)

If the coolant level is low it needs to be topped up with the correct spec coolant and then the cooling system checked for leaks which could be faulty/worn hoses and/or a leaking radiator. If the car continues to overheat after running with the correct coolant level refer to 2 below.

2. If your coolant level is fine the entire cooling system needs to be flushed out and replaced with new coolant of the correct spec. ( If this has not been done for a couple of years it should be routinely carried out in any event every 2 years regardless of any problems).

Whilst this is being carried out the thermostat needs to be removed and checked. If it has not been recently replaced, a new one of the correct spec should be fitted. It is possible that the overheating is being caused by a sticking thermostat which is impeding coolant flow between the engine and the radiator once the engine warms up.

At the same time the water pump should be removed and inspected. If the pump has never been replaced or has not been replaced for many years it is on it's last legs. A faulty/corroded water pump will be unable to flow sufficient coolant through the engines cooling system from/to the radiator and the engine will overheat.

Any old or tired looking rubber hoses (radiator and heater hoses) should be replaced while this work is being carried out.

When the servicing is completed and the new coolant added, the system will need to be bled of air. If this is not done air in the system will impede coolant flow and the engine will overheat. The entire system should then be checked for leaks.

Do not operate your vehicle whilst you have this overheating problem except to get it to the nearest reputable auto service center. You can do very expensive damage to the engine if running it overheated .

Dec 06, 2009 | 1992 Subaru Legacy

3 Answers

90 subaru legacy overheats, wheres the thrmostat


When a car overheats it's rarely the thermostat. They just don't go bad that often. If it overheats when you idle a lot, it's the fan and with electric fans, it's almost always the fan motor. But to find the thermostat, follow the top radiator hose to the engine and there it is.

Aug 01, 2009 | 1990 Subaru Legacy

1 Answer

'90 Subaru Legacy overheating....


cool air and overheating point to low coolant level. Do you have a bleeder valve near the thermostat? You may have air trapped in the system. If no air trapped, the radiator may be plugged up not allowing proper circulation of coolant.

Mar 24, 2009 | 1997 Subaru Legacy

2 Answers

Overheat on my 1997 Subaru Legacy GT


Sorry if this might break your heart. I have '98 Outback which is the same 1st generation DOHC 2.5 engine. These are common head gasket problem (I'd say 100% of every engine sooner or later) once you have had your car overheated.

You will not get this comfirmed by just have your mech check the compression on the cylinder because we call it phantom leak (internal leak which can be confirmed with hydrocarbon in coolant). And then you will end up replace every other thing before you could reach the source of problem.

Other signs of this issue are as following: random overheating after freeway or uphills drive, bubbles in coolant overflow tank, oil residue in coolant overflow tank, bubble nioses from the a/c vent.

You're looking at $1000-1500 repair by independent mech as they have to pull engine out to fix the problem. I had mine fixed two weeks ago and now my baby is running like a champ.

google for "Subaru head gasket problem"

Dec 21, 2008 | 1997 Subaru Legacy

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