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
 

Photo
- - - - -

Heater core bad? EA81


  • Please log in to reply
4 replies to this topic

#1 Hatchet

Hatchet

    New User

  • Members
  • PipPip
  • 17 posts
  • UT

Posted 21 November 2005 - 05:05 PM

On cold days the heater air goes cold about 10 seconds after I turn on the fan. Instead of getting a new heater core I put in a new thermostat and added new coolant after flushing. But it didn't solve the problem. Anyone?

#2 grossgary

grossgary

    Elite Master of the Subaru

  • Members
  • 19,807 posts
  • WV

Posted 21 November 2005 - 05:56 PM

pull the hoses and flush out the heater core with either your garden hose or an air compressor or both. might need to get some cleaning agent in there and actually clean it out....but you wouldn't want anything harsh for your heater core. i'd see how just a basic flush does, i'd bet alot of gunk comes out.

someone on xt6.net just had this same problem and fixed it by blowing the heater core as i just mentioned. someone else actually bought a small pump and created a little system to keep a solution of water and cleaning agent running through the heater core. pretty hard core just to flush it out, but if it's bad enough maybe that's necessary? you can go to www.xt6.net and read the current thread about it.

#3 Subarian

Subarian

    1000+ Super USER!

  • Members
  • 1,150 posts
  • Orem

Posted 21 November 2005 - 08:56 PM

I would flush it with the garden hose, but reverse flush it, so the hose is on the outlet side of the core. Also check to make sure the air door is closing off the cold air when the heat is on. The cable sometimes breaks off the end of the lever.

#4 Hatchet

Hatchet

    New User

  • Members
  • PipPip
  • 17 posts
  • UT

Posted 21 November 2005 - 10:26 PM

Thanks for the replies!

Will a flush work if there is hard build up in core?

I was thinking of getting a new core and doing the simple replacement by cutting a hole in the side of heater box as written by someone on the forum. But I wanted to try everything else before it came to that.

I never thought of checking the cable that keeps the cold air out. That just might be it. If not then I'll reverse flush and if that does not work then replace the core.

#5 Subarian

Subarian

    1000+ Super USER!

  • Members
  • 1,150 posts
  • Orem

Posted 22 November 2005 - 12:09 AM

A simple garden hose flush won't remove hard deposits, but it might be enough. Like you said, it's worth a try before you spend the time and money on replacing it. It worked for mine.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users