I have a 2009 Subaru Forester XT with a 5 speed manual.
I have noticed my cars overflow bottle is always requiring a topup, this cannot be normal.
So I have been looking everywhere for a leak. I have used my coolant pressure tester and had the system at 20psi and have not been able to find a leak
It will slowly loose psi, approx 1 psi every 3-5 minutes. Sometimes it will drop quite quickly...
I have checked the top two radiator hoses, they appear fine. no leaks there radiator side and engine size. Heater hoses look good no weeping there, Thermostat housing - no leaks.
I am starting to run out of places to look.....I can smell coolant most times when I pop the bonnet - the car runs great, no issues with power and the oil/coolant are not contaminated.
Turbo lines look ok as well - no crusty coolant residue and no leaks while under pressure.
I got a buddy to follow me while I gave my car some heavy loads/acceleration to see if there was any smoke out the tail pipe - apparently no smoke.
I am lost!