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

- - - - -

weird, weird, weird - overheating or not???

  • Please log in to reply
3 replies to this topic

#1 zzzasy


    USMB Regular

  • Members
  • PipPipPip
  • 55 posts
  • Woodbridge

Posted 29 April 2005 - 11:57 AM

Drove in to work yesterday morning in my "98 Outback wagon with no problem. On the way home I noticed the temp gauge was going very hot. Turn on the AC to ensure that fans were working, but the AC was cool, not cold like it usually be. Stoped a gas station bought antifreeze. When I went to put the antifreeze, I noticed the overflow tank was full and the radiator was pretty much empty. This is the second engine due to overheating and cracked heads. When I saw the overflow full, I said to myself must be the water pump (which I changed about 3 months ago). Waited for awhile for the car to cool down. Then I kept going; the car would continually register hot so I would pull over occasionally to let it cool down a bit.

All of a sudden while riding the AC kicked into cold and temp gauge returned to normal. As long as I was highway driving it seemed ok. When I got home, I checked the antifreeze it was low again; the overflow had flowed some. I filled the radiator and it kept burping; letting pour more and more in. I was saying to myself; I must have a head gasket problem or something, because out of all the antifreeze I had used. There was no antifreeze running anywhere external. Looked in Haynes and they mentioned the cap as a possible problem. So, later that night I went to buy a new cap. On the ride to get the cap, the car ran fine. Got up this morning and I said I going to drive it to work to see what happens. The morning trip was fine; with on sign of overheating.

What do you think this problem is? If it was the cap, shouldn't I have seen antifreeze sprayed under the hood. Could it have been a stuck thermo or water pump? What do you think?

'98 Outback 2.5ltr

#2 Sweet82


    Elite Master of the Subaru

  • Members
  • 3,274 posts
  • Salt Lake City

Posted 29 April 2005 - 12:19 PM

My question after reading your post is....

Are your fans working? :eek:

One fan should come on with your AC as soon as the switch on the dash is turned. Is this happening?

Just for fun :lol: Jump power to your fans and see if they are playing the game?

Next I'd look at the relays that control the fans. On my Forester they were "swappable" with other relays so the test was easy.

My main fan was not working and my heat would do strange things...

Good Luck,
82 SubaruHummer
01 Forester

#3 Gnuman


    1000+ Super USER!

  • Members
  • 1,399 posts
  • Richmond, CA

Posted 29 April 2005 - 12:37 PM

Stoped a gas station bought antifreeze. When I went to put the antifreeze, I noticed the overflow tank was full and the radiator was pretty much empty.
'98 Outback 2.5ltr

You have a phase 1 2.5 engine. The highlighted text is a classic symptom of a bad headgasket. What happens is that the gasses from the combustion chamber blow into the coolant area and cause a vaporlock (as if it had not been properly "burped"), which can cause the heads to warp if not remedied quickly. My guess is that it is time to have the head gaskets replaced. If the waterpump were the problem, then you would not have gotten enough flow to shove the coolant out into the overflow tank. . .

#4 zzzasy


    USMB Regular

  • Members
  • PipPipPip
  • 55 posts
  • Woodbridge

Posted 29 April 2005 - 01:15 PM

Yes, the fans are working. They weren't working a few weeks ago, but I replaced the coolant temp sensor and they appear to be working now. Both fans come on immediately when I switch on the AC. If it is the head gasket, how long will the car continue to run. Because like I said, this morning there were no signs that any of this ever happened. Could it just be the coolness of the morning air that's making it unnoticable in the mornings?

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users