Alright guys, I'm trying to sort out my friends 99 Outback (EJ25D, 5MT). 187K, original HGs, timing has been done some time ago.
Having heard all the problems with the EJ25D and the infamous headgasket failure.
- System does not leak externally
- Car has heat the entire time
- Car does not overheat at idle or if I drive easy from cold. I can drive 50+ miles this way)
- Once I spank it (5K+ RPM) the bottle level increases and at idle, I can see tiny bubbles bubbling in the over flow tank. Maybe 1 bubble every second.
- If I drive it hard enough, the bottle overflows and the temp spikes (confirmed with my scanner, 255+), fan kicks on
- Compression check (All cylinders within 5%, hot and cold)
- Exhaust gases NOT found in the radiator or overflow (using the Lisle tester, both hot and cold)
- If left to cool, it will bring some of the coolant back into the radiator, but not back to the original level
- Timing belt seems older and some skid marks on the back. All of the pulleys rotated fine, but I did not check the water pump. Tensioner arm seemed to have SLIGHT slack (translational movement)
- Upon refilling the system, I filled the water crossover first (upper hose) to the brim, then the radiator
- New radiator cap
- New Subaru thermostat (PO had de-cored it to prevent overheating, I imagine)
Now, if there are no exhaust gases present, and it does not overheat if I drive it old-man style, are the headgaskets still at fault?
Could this be a water pump failure? Clogged radiator?
When filling the system (from draining the radiator and thermostat/water pump) I only used about 1 USgal... too little?
I'm starting to love my EA82 more and more.. 8O lol Thanks!