Jump to content

Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse

- - - - -

Overheating/2003 legacy 2.5 engine

  • Please log in to reply
4 replies to this topic

#1 lcb


    New User

  • Members
  • Pip
  • 3 posts
  • mich

Posted 13 March 2012 - 04:21 PM

Temp gauge went up and down and finally into the red. I checked and found no leaks, fan was working, neither the a/c or heat was on, coolant level was good, radiator is about 2 years old. I'm hoping it's as simple as a thermostat problem. If so, where is it and is it easy to replace? I'm not a mechanic but not afraid to try if it's "reasonably" easy, meaning I don't have to put the car up in the air and it's possible to just have to crawl underneath.

#2 Mike104


    Subaru Fanatic!

  • Members
  • 731 posts
  • N KY

Posted 14 March 2012 - 07:25 AM

Yeah its pretty easy. Two bolts on the water pump (attached to lower rad hose) and pull it out. It will drain all of the coolant so be prepared for that. Make sure you use a Thermostat from a Subaru dealer and you "burp" all of the air out of the cooling system. May also want to change the rad cap while you are at it.

I think your car needs the Subaru Coolant conditioner (less than $2 from Subaru dealer) added to radiator? May help with external coolant leaks.

#3 mattocs


    Subaru Legacy Lover

  • Members
  • 1,312 posts
  • Pittsburgh

Posted 14 March 2012 - 07:33 AM

There is also an aftermarket thermostat that is acceptable, made by Stant. There is a stickey about it. It comes with the gasket. I just ordered one from Amazon for $15.

#4 idosubaru


    Elite Master of the Subaru

  • Members
  • 24,013 posts
  • East Coast

Posted 14 March 2012 - 08:39 AM

odd symptoms for this motor, it usually has other associated symptoms - have the headgaskets ever been replaced (common issue for this motor)?

when it overheats - do you have heat in the cabin area or does it get cold?

any recent work? if the coolant isn't properly bled they can overheat.

about a gallon-ish of coolant dumps out when replacing the tstat so be ready. from the hose side when you pull that off then another smaller gush when you pull the stat out, goes everywhere, be ready.

if you replace the tstat - be sure to bleed the coolant properly and be prepared for another overheat event right after the replacement since air easily gets trapped in these cars. some of the radiators have a plastic type screw on the top passengers side of the radiator. loosen that and keep adding coolant until air bubbles stop coming out, then tigthen screw, finish filling. otherwise read the other threads about bleeding or burping the system. you'll need that after replacing the tstat.

#5 jarl


    Subaru Fanatic!

  • Members
  • 551 posts
  • Ann Arbor area

Posted 14 March 2012 - 10:42 AM

What they said. The only other thing that would be good to know is how many miles are on the car (to know what may/may not have been done to it).

The burping of the system, as Grossgary said, is critical... search the group for instructions on how to do it (lot of people have problems doing it right)

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users