Im out of Ideas. Here is the scoop. 1998 Legacy GT 2.5L Bought car not running it needed a timing belt and a radiator. I replaced the radiator, Water pump, Tstat, rad hoses, timing belt, other belts. After that the car ran ok for a week or 2 and then it started overheating. A friend of mine talked to the master tech at his work and explained what was going on and he said the headgaskets were bad. So this weekend I replaced the headgaskets. Started it for the first time and let it run and the coolant temps started climbing(in between 1/2 and 3/4 and then I shut the car off). I checked the block and head for cracks when they were apart and I didnt see any. Im out of Ideas. I have replaced everything that has to do with the cooling system. Anyone know what it could be
I am going to take a stab at it and say air bubble. Subaru's suck when it comes to getting air bubbles out of the cooling system. Some of the techs at my work actually lift the front of the car off the ground when trying to get all the air out. Other wise just let it sit and work some of the air out. Biker boy may have some tips for you on this also.
Yes he did... Maybe a bad temp sensor in the coolant line? Most subarus have the temp gauge right in the middle...
mine did the same thing when i did h/gs...you need to put a funnel on the rad, fill it up, let it run till the t stat opens, then shut the car off, all the air will escape then for a sec the water pump will flow in reverse (ever so slightly) and it will burp the system, also try jacking the front of the car up. do it a couple times and you should be set!
Everyone seems to have a different method to burp coolant on subies. Leaving caps off, hand-squeezing the lines, etc. This is how I do it. Assuming it is just coolant air bubbles, I just follow what it says in the owners manual, works wonders really. Subaru sure knows what they're talking about when it comes to their engines I did this same method on my NA ej25 and my jdm ej207. Fill rad full with coolant (with turbo engine, fill manifold reservoir too), fill overflow reservoir with just a little bit (like 1/6), put all caps on tight. Start it up and turn heater on full blast. Rev engine between 2.5k-3k and hold it there for 3-5 mins. You will see temp gauge go up, just let it. T-stat will soon open, and your heater will start blowing from cool to super hot air in an almost immediate step, it's almost like a 'pop' - it's not gradual. Temps should return to normal a very short time after, sitting at 2/5 on the gauge. Turn car off, let it cool down, top off coolant as needed through your overflow reservoir. If that doesn't fix your problem, then it's probably not air bubbles. Or you can try someone else's burp method
You could have a clogged radiator, but who knows. Make sure the radiator is full, and the overflow has coolant in it, and run it through at least 2 fan cycles. If it still overheats, pull the radiator and flush it with a garden hose.
Its a brand new radiator so Im assuming its not clogged. Im going to work on it tomorrow. BUT I need to know which fan is which. The fan on the pass side(the main fan I believe) doesnt come on and it keeps blowing fuses.
He said it has a brand new radiator, and t-stat. I hope this is not the case, but, since the previous owner knew the car had a overheating problem, (hence the recommendation for the radiator), the heads may be warped. This could have happened if they drove around long enough while overheating. I have seen this happen before.
The drivers fan is the main one. Tangled's right fan was unplugged and it never set a code for it, as it will if the left one is unplugged. I think you may need to go to Napa and pick up a cooling system bucket. Run it with coolant in the bucket, and let it get warm. If bubbles keep coming up into the bucket, you have problems!
