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
- - - - -

bleeding air from cooling system


  • Please log in to reply
5 replies to this topic

#1 twofullas

twofullas

    New User

  • Members
  • PipPip
  • 11 posts
  • papamoa new zealand

Posted 29 May 2005 - 03:04 AM

i have just changed the coolant in my 95 legacy , there seems to be a trickling noise behind the dash board . im sure there is air in the system . how do you bleed it from the system?

#2 lmdew

lmdew

    _______

  • Members
  • 3,054 posts
  • Colorado Springs

Posted 29 May 2005 - 05:42 AM

Jack the front as high as possible. Drain the coolant and then slowly refill the system with the bleed open. I pull the top radiator hose and fill the engine, pouring fluid into that hose. I also put a radiator flush fitting in the heater hose and leave it open until fluid comes out.

When you've fillled the engine completely, put the radiator hose back on. Continue to fill the system, pouring fluid in the small bleeder hose until the fluid comes up to the top of the radiator fill cap.

Start the engine and pinch the top radiator hose open and close, it will help move any air along. When fluid starts coming out the radiator cap fitting, put the cap back on and let the engine come up to temp. Make sure the heat in on full hot for the complete process.

Let it cool, and check to make sure the radiator is full.

#3 hklaine

hklaine

    ShadeTree Extraordinaire

  • Members
  • 356 posts
  • Hunterdon County

Posted 29 May 2005 - 08:20 AM

My car also has a small bleed screw on the top of the radiator (passenger side).

-Heikki

#4 Setright

Setright

    Elite Master of the Subaru

  • Members
  • 3,176 posts
  • Denmark

Posted 30 May 2005 - 12:29 AM

Search for "coolant replacement" without the bubbles.

However, since you have already filled the system. Do as mentioned above. Park on a slope facing upward, 5 degrees is plenty. Let the engine COOL. Open the rad cap and bleeder if you have you one. Start the engine and idle until the fluid starts rising in the rad cap filler neck. Now, switch OFF the engine again. Hopefully, this will produce a "burb" at the cap filler neck and the level will drop again. Idle until it rises again, close the bleeder and cap.

Run the engine speed up to around 2000rpm for about ten seconds, either by hand in the engine or use the throttle as normal. Go for a gentle drive, and park the car level when you get back. Make sure the overflow bottle is filled to at least "max" - due to heat, it may be higher, perfectly normal.

Check the level in the overflow again after a long cooling period - over six hours - adjust as needed.



(Cabin heat on or off is irrelevant, there is always flow in the heater core.)

#5 Setright

Setright

    Elite Master of the Subaru

  • Members
  • 3,176 posts
  • Denmark

Posted 30 May 2005 - 12:31 AM

If you find that the system doesn't seem to want to loose the air, I would recommend fitting a new Genuine Subaru radiator cap. The spring and seals on the cap may be old and tired.

#6 twofullas

twofullas

    New User

  • Members
  • PipPip
  • 11 posts
  • papamoa new zealand

Posted 01 June 2005 - 04:41 AM

thanks i wil try all these things this weekend . i live in new zealand youve all been a great helpi

If you find that the system doesn't seem to want to loose the air, I would recommend fitting a new Genuine Subaru radiator cap. The spring and seals on the cap may be old and tired.






0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users