1998 subaru forester. timing belt ,water pump, and thermostat recently changed. car overheats when taken on highway. cools down if i pull over and idle car.a mehanic who preformed the above work stated it may be a internal leak.i don't understand. do you have any info for me or have idea of what can be done next. should i try dura-seal?

SOURCE: 1990 Subaru Liberty Overheats

Hi,

I had the same problem with my 1993 Liberty LX. Remove the thermostat (located inside bottom radiator hose engine connection - take the connection off and thermostat is inside). Reassemble (minus thermostat), reconnect bottom hose. Slowly (very, very slowly) refill the radiator and remove the bleed plug ( located beside the top hose connection to the radiator - a black square plug with a phillips head cross in the middle). When the radiator is full and clear water (no air bubbles) is coming out of the bleed point, replace the bleed plug and then the radiator cap.

Run the engine for five minutes (approx) or until normal engine temperature is reached. Allow the engine to cool down and recheck the water level - fill if necessary ensuring that the bleed plug is open and clear water is coming out of that point. Replace Bleed plug and then radiator cap. Run engine for five minutes (approx) and then test dive. If the engine overheats keep filling the radiator until there are no air bubbles coming from out of the bleed point.

This fixed my overheating problem. Good luck and safe motoring.

SOURCE: timing belt replacement

The timing belt on this car should done based on which ever comes first recommended mileage or time basis. If this car has the 2.5 litter Engine I would recommend changing it ASAP. The 2.5L engine is What is referred to as an interference engine which means that if the timing belt breaks the pistons will slap the valves rendering the engine useless. Keep in mind a timing belt is made only of rubber and nylon cord it is not uncommon for them to fail before the recommended service intervel

SOURCE: My 98 subaru forester is over heating

The head gasket may be a problem, but it may be simpler, if your thermostat is on the bottom of the engine.
If coolant came out when the thermostat was changed, there should be a screw, probably plastic, that goes into the radiator, or near the inlet hose, at the top. This screw is used to release steam when car overheats to restore the vaccum. Turn car on and let idle to overheating temperature. NOW PROTECT YOURSELF FROM GETTING A STEAM BURN. Turn the screw very slowly until steam starts to come out, don't unscrew all the way or you will loose a lot of coolant all over your engine. make sure the coolant resevore has enough coolant to get sucked back in to the engine or this will take longer. Continue this process until there is no steam coming out, I let mine go until a little liquid coolant starts to bubble out from around the screw. Tighten screw and keep a watch on your temp gage, you may have to do it a couple of times as the coolant forces the air pockets out of the line. If this doesn't solve your problem then I would say check the headgasket.

SOURCE: Subaru Forester window air leak

Just replace the door seals around windows. I never heard of replacing the windows

SOURCE: Subaru Forester window air leak

take out the tweeder covers if you have tweeders or remove the triangle covers were the tweeders woud be ,then stuff a klittle foam in their,worked for me