bgambino Posted August 11, 2009 Share Posted August 11, 2009 my 02 suby GT 2.5 When the engine cools down...the lower radiator gets sucked flat...like there has been a vacuum drawn... It's almost like it wants to such coolant back in from the overflow but its blocked (I'm not saying it is...its just that it would seem that way)--it should be sucking from the overflow tank and not collapsing right? Link to comment Share on other sites More sharing options...
NoahDL88 Posted August 11, 2009 Share Posted August 11, 2009 could be low on coolant, 02 legacy could be a head gasket leak Link to comment Share on other sites More sharing options...
OB99W Posted August 11, 2009 Share Posted August 11, 2009 If loosening the radiator cap releases the suction, see http://www.ultimatesubaru.org/forum/showthread.php?t=87072 Link to comment Share on other sites More sharing options...
nipper Posted August 11, 2009 Share Posted August 11, 2009 Start simple, replace the cap, its cheap. nipper Link to comment Share on other sites More sharing options...
Log1call Posted August 11, 2009 Share Posted August 11, 2009 Yup. Check the return hose from the overflow tank isn't blocked then change the radiator cap. Link to comment Share on other sites More sharing options...
subiemech85 Posted August 13, 2009 Share Posted August 13, 2009 bad cap lev-r-vent it Link to comment Share on other sites More sharing options...
ericem Posted August 13, 2009 Share Posted August 13, 2009 When you remove the cap it shouldn't have any vacuum though regardless if the hose is collapsing or not? Link to comment Share on other sites More sharing options...
subiemech85 Posted August 13, 2009 Share Posted August 13, 2009 there will be vac. after the PRESSURE goes away from running as it cools Link to comment Share on other sites More sharing options...
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