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tamaz, Subaru master technician
Category: Subaru
Satisfied Customers: 1250
Experience:  Subaru certified,ASE Master technician,25 years experience
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Subaru B9 Tribeca: I have had the heads decked with new head

Customer Question

I have had the heads decked with new head gaskets, the machine shop said it is with-in .002 still over heating. The machine shop pulled the motor again to make sure the head gaskets were installed properly.
We replaced the radiator, could the heater core cause this?
Submitted: 2 years ago.
Category: Subaru
Expert:  tamaz replied 2 years ago.
Hi,thanks for your question.If it is restricting coolant flow of course it could ,when the cooling fans come on does warm/ hot air come out from the fans,if air is cool there most likely is a air pocket causing the overheat,The Tribeca can be difficult to bleed air from the system when filling the highest point is the heater core so there is a bleed screw coming of the heater hoses that needs to be removed when filling so all air is removed was this done?
Customer: replied 2 years ago.
Yes, but not very well. We also replaced the water pump while it was apart! Could this be a problem?
Expert:  tamaz replied 2 years ago.
The water pump could be the problem if the impeller shaft is broken ,this would mean little or know circulation ,because you replaced the pump this is very unlikely.
Customer: replied 2 years ago.
Expert:  tamaz replied 2 years ago.
Your welcome !