NUMBER: 09-52-08
DATE: 08/19/08
APPLICABILITY: | 1999MY and later Impreza & Forester |
2000MY and later Legacy & Outback | |
2006MY and later Tribeca | |
SUBJECT: | Coolant Overflow |
INTRODUCTION
If you encounter a vehicle which experiences coolant coming out of the coolant reservoir tank, it may be caused by the radiator cap pressure valve being stuck open by debris sucked up through the reservoir tank hose. 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. This causes the radiator cap not to seal, allowing excessive amount of coolant to escape overflowing the reservoir tank. If this condition continues over time, there will not be enough coolant in the system to maintain proper engine temperature.