Why is my radiator pushing coolant into Reservoir?
Coolant, or antifreeze, is essential to regulating the temperature of your vehicle. It’s also extremely toxic and designed to stay inside a closed system. If you’re seeing an overflow, it could be due to a radiator cap, thermostat, water pump, or radiator malfunction.
What causes pressure in radiator?
When the fluid in the cooling system heats up, it expands, causing the pressure to build up. When the radiator cools back down, a vacuum is created in the cooling system that pulls open another spring loaded valve, sucking water back in from the bottom of the overflow tank to replace the water that was expelled.
What are the symptoms of a failing radiator cap?
Symptoms of a Bad Radiator Cap
- Leaking coolant.
- Engine overheating.
- Collapsed radiator hose.
- Coolant reservoir tank overflowing.
How can I tell if my radiator is clogged?
5 Signs That Tell You Your Radiator Is Clogged
- Leaking coolant. Scroll to continue with content.
- Discolored and thicker coolant. You know your coolant’s original color, don’t you?
- Damaged water pump.
- Excessively high gauge temperature readings.
- Blocked, bent, or damaged radiator fins.
Why is my Subaru Outback losing coolant?
As the cooling system cools down, it sucks coolant back into the radiator. If there is debris that settles to the bottom of the reservoir tank, the hose is low enough to also suck them back into radiator.
Can a new radiator stop bubbling in overflow?
When the HGs went on the ’99 Outback, it behaved like yours for a long time. Just bubbling in the overflow, no other symptoms. After a few months, it stopped sucking coolant back in from the overflow on cooldown. New radiator cap didn’t change anything.
What to do if your Subaru coolant leaks?
Squeeze all the hoses (while they are cold) and ensure all hose clamps are tight. There is lots of generic non-Subaru specific guidance on diagnosing coolant leaks on the interwebs…
How to check radiator cap pressure in Subaru Outback?
Using clean water and a brush, thoroughly clean the valve (inner and outer surface) and the valve seal surface. Check the radiator cap valve opening pressure using a radiator cap tester to insure the cap is within specification (refer to the applicable Subaru Service Manual).