1998 Subaru Legacy Outback Q&A
1998 Subaru Legacy Outback Question: bad head gasket??
losing the anti from the radiator. got this car wo a therostat ran well but cold inside LOL. put in a new one and idles fine put run it a mile or so and it steams up.. never saw a boxer motor before looks like a bear to do and if I do one should I do both?? or just relie on guages to judge. what about the h2o pump? Any all help and hour to repair would help........ - neohiobiker
Your 98 Legacy has the DOHC 2.5, which is prone to internal head gasket leaks at the coolant passages. The coolant leaks into the combustion chamber, and is burned up. The tell-tale sign of a head gasket failure on these is a steady stream of bubbles in the coolant reservoir when the engine is running, as well as an overheat. If it is the head gasket, the best practice is to pull the engine, and replace both head gaskets along with head bolts, a new timing belt/idlers/tensioner, water pump, thermostat (HAS to be OEM Subaru), and radiator hoses. Along with that, since many have to come off anyway, you should change the accessory/serpentine belts, the spark plugs/wires (plugs should be NGK, wires OEM), air filter, PCV valve as well as oil/filter change, (basically a tune-up) along with coolant (obviously) and any oil seals (crank/cam seals or rear main seal/oil separator plate). Finally it is also a good idea to have the cylinder heads machined, as the tolerances are very small for aluminum engines. I would recommend OEM parts wherever possible, especially the head gaskets themselves, as well. You can get a head gasket kit as well as other parts from www.subarupartsforyou.com. This is a long, expensive job, but using Subaru's updated head gasket for the DOHC is a true fix. - ryans93
What are the odds of the cylinder being bad also?
all systems point to problem
A mechanic put some kind of seal it...Silver goop into our brand new radiator because car keeps heating up even though we just replaced the thermostate and coolant sensor. Water pump seems to be wo...