probe Posted August 20, 2005 Share Posted August 20, 2005 97 2.5 Outback DOHC Fans work, thermostat seems to function. The fan/fans kick in and the thermostat opens drawing fluid into rad. The problem is that the overflow bottle overflows while driving and gradually the system loses coolant. I have flushed the rad, bought a new Subarau rad cap, also open the system to allow air to escape to prevent an airlock. Please tell me this is not a head gasket or combustion problem... Mike Quote Link to comment Share on other sites More sharing options...
Meeky Moose Posted August 20, 2005 Share Posted August 20, 2005 exact same thing mine was doing.. ended up being a cracked block, had to swap the motor 97 2.5 Outback DOHCFans work, thermostat seems to function. The fan/fans kick in and the thermostat opens drawing fluid into rad. The problem is that the overflow bottle overflows while driving and gradually the system loses coolant. I have flushed the rad, bought a new Subarau rad cap, also open the system to allow air to escape to prevent an airlock. Please tell me this is not a head gasket or combustion problem... Mike Quote Link to comment Share on other sites More sharing options...
Commuter Posted August 20, 2005 Share Posted August 20, 2005 Make sure that the hose connecting the rad to the coolant expansion bottle is in good shape. No leaks. Any bubbles, or oily skum in the coolant expansion bottle? Commuter Quote Link to comment Share on other sites More sharing options...
blitz Posted August 21, 2005 Share Posted August 21, 2005 probe, when you squeeze the top hose, is the system building pressure? Quote Link to comment Share on other sites More sharing options...
edrach Posted August 21, 2005 Share Posted August 21, 2005 Try replacing the radiator cap; not only does it open to allow coolent out of the rad into the overflow tank, but it also needs to open to suck coolent back into the radiator when the engine cools down. There are actually two valves in your cap to allow back and forth flow depending on temperature. Quote Link to comment Share on other sites More sharing options...
nipper Posted August 21, 2005 Share Posted August 21, 2005 Take the raditor cap off the car when its cold. Let the car run and se if there are any bubbles in the coolant. If there is you have a blown headgasket or worse cracked block. I would vote for headgasket. nipper Quote Link to comment Share on other sites More sharing options...
Setright Posted August 21, 2005 Share Posted August 21, 2005 Well, if you already fitted the new cap, then yes, it sounds like a bad headgasket :-( Quote Link to comment Share on other sites More sharing options...
Sweet82 Posted August 22, 2005 Share Posted August 22, 2005 Is your antifreeze topped off in both the radiator and the overflow tank? Quote Link to comment Share on other sites More sharing options...
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