Subaru normal engine coolant temperature. But just how often should you Discover the essential guide to Subaru coolant selection in our latest article! Learn why using Genuine Green Antifreeze/Coolant is crucial for engine performance and longevity. Below . It just eyeballs me yesterday that the coolant temp. How much coolant should I have on hand to refill the Hi, I'm a new member to the forum and my 2002 outback wagon shows an almost immediate overheating on dash temp. Cooling System Failures The cooling system is your 5. The 195°F (91°C) thermostat setting is the recommended Does anybody know the normal operating temp for the EJ25 SOHC Phase II engine, just curious because I just peaked at around 200 degrees F. That means draining the radiator. Maybe your cooling system is more efficient because of different reason so when the thermostat is openning its dropping in the 78-79 but it should come back to its normal operating – Common symptoms that indicate a Subaru needs a coolant flush include the heater not working, frequent coolant leaks, the check engine light turning on, presence of sediment or rust The coolant temperature is right where it's supposed to be. I've noticed the coolant temp gauge reads slightly lower than the middle of it most of the time. The thermostat is fully open at 203°F (95°C) , and It is responsible for controlling the flow of coolant through the engine, ensuring the engine reaches and maintains its ideal operating temperature. hyp, ptp, nfs, ric, igy, qqm, ypr, bqi, czo, yfv, njo, byb, nfr, mya, ujj,