View Full Version : Will a clogged heater core cause engine to overheat?

01-20-2012, 02:31 PM
98'legacy outback. Still trying to troubleshoot cooling system. Any ideas or tips on figuring out where blockage could be will be very helpful................thanks everybody

01-20-2012, 08:36 PM
The heater cool isn't involved in cooling the engine(although it will remove some heat from the engine; useful if your car is overheating, as a "get you home" remedy). If it is clogged, it's probably indicative of a cooling system that needs flushing.

Do you see good flow in the radiator when the cap is off and the engine is at operating temp?

Have you tried a can of rad flush?

02-06-2012, 09:10 PM
Sorry but it always ends up being head gaskets try everything but you will r r heads and if not warped do aftermarket head gaskets if warped mill as little as possible

02-25-2012, 12:38 PM
head gaskets mean? it is not clear to me.....

02-27-2012, 09:48 PM
Yes it always ends up removing heads, checking for warp,. Use aftermarket head gaskets. No way out this is the only fix after ruling out the radiator