![]() ![]() I would suggest you go back to the dealer where you had your work done and have them do the hydrocarbon or whatever test they may perform to determine the problem. Also,this collecting of gasses on the top of the thermostat was what was causing my heater blower to randomly go Ice cold. Apparently,the top side/engine side of the thermostat needs to be immersed in hot coolant,void of air and gasses to function properly. Sometimes buildup occurs in the cooling hoses, resulting in slower coolant flow and. As an Amazon Associate, I earn from qualifying purchases. Cummins Chevrolet Powerstroke Motorcycles Diagnosis Accessories What Are Equivalent To Subaru Super Coolant Blog. Until now,now that I have replaced the HG'd,there are no bubbles and the lower radiator hose is luke warm at running temp.įrom my research,I found that combustion gasses may collect on the engine side of the thermostat causing it not to open. Read the article about the Subaru Super Coolant. I also changed the water pump out and burped the cooling system several times. I tried 3 or 4 thermostates and a few diffrent radiator caps. The one thing that was always constant was the bubbles in the reservoir tank. And,I was having the lower radiator hose ice cold compared to the upper hose after a 5 or 10 mile drive. I was having intermittent hot/cold air from the heater blower,I was having random temp gauge spikes, I was also finding the reservoir tank fill completely up with coolant after a drive. The most troubling symptom I was having was bubbles in the coolant reservoir tank. I replaced them both and now my car is running fine. My problem ended up being bad head gasket's. I just went through alot of what your going through. I really think the system is being over pressurized for some reason. I realize that the system pressure normally increases when the engine is hot, but this felt too high based on the firmness of the hose. I gave a slight squeeze to the upper radiator hose and surprisingly it seemed far too firm (excessive pressure). It almost seemed like there was too much pressure in the cooling system. I drove it again today and then checked things when the car was hot. ![]() It almost seemed as if coolant may have been spraying out of somewhere. The top seam of the radiator housing looked a little wet where the metal crimp is. That seems to have stopped the leak there, but this morning I checked under the hood again and noticed droplets of coolant sprayed onto certain areas, such as onto the power steering fluid canister, plastic intake plumbing, etc. It was still leaking a little so I tightened the clamp a little more. I tightened the clamp and then checked it again in a few more days. I checked under the hood and noticed a small amount of coolant leaking from where the upper radiator hose connects to the block. 2000 Outback Wagon, EJ251 motor, Auto trans, 137K miles, complete new head gasket job and timing belt with water pump done at Subaru dealer at 100K miles.Ī few weeks ago, I noticed a slight smell of coolant when the car was hot. ![]()
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