Tribeca F6-3.6L (2008)
Coolant Line/Hose: All Technical Service Bulletins
Cooling System - Coolant Comes Out Of Reservoir
NUMBER: 08-52-08
DATE: 08/18/08
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.
In order to correct the condition you need to clean (and test) or replace the radiator cap, clean out the reservoir tank, and shorten the hose slightly,
following the repair procedure.
Production Line Change
The shorter coolant reservoir tank hose was used in production as shown above.
Repair Procedure/Information
1.
Radiator Cap Cleaning
Many caps can be successfully cleaned. The important part is the thorough cleaning of the negative pressure valve. If this is not done completely,
remaining debris may result in a repeat issue. If there is an excessive amount of debris or the sealing rubber on the cap appears to be pitted or
damaged, replace the cap.
Note:
If replacing the cap, skip to Step 2.
Using clean water and a brush, thoroughly clean the cap seal surface.
Note:
