B5 Models Please discuss all 1996 - 2001 B5 A4 topics here...

Bubbling from expansion tank.

Old Nov 4, 2018 | 08:52 AM
  #1  
Fredrik Maartensson's Avatar
Thread Starter
|
1st Gear
Joined: Oct 2018
Posts: 13
Default Bubbling from expansion tank.

Bubbling from expansion tank, help.

Hi and sorry to bother you all with my car. Just bought it very cheap, and im not that good at cars 😄
When i got back from a ride and open to look at the coolant level, its under minimum and bubbling alot.
Things ive done is:
*smelled the CAP and tank = no gas smelled.
*no white smoke from exhaustpipe.

Going to do:
*Change thermostat tomorrow.
*Locate the leakage
*Flush the heatercore
*Bleed out air if any.

So what can i do more ?


Update: I filled up the expansion tank again and drove about 10km and checked again, but no bubbles this time. Sooo....can it just be air inside the system ? And it spits out back into the tank and out in the small plastic pipe on the backside of the tank ?
 

Last edited by Fredrik Maartensson; Nov 4, 2018 at 12:18 PM. Reason: Update
Old Nov 5, 2018 | 07:21 AM
  #2  
Fredrik Maartensson's Avatar
Thread Starter
|
1st Gear
Joined: Oct 2018
Posts: 13
Default

Originally Posted by Fredrik Maartensson

Bubbling from expansion tank, help.





Update: I filled up the expansion tank again and drove about 10km and checked again, but no bubbles this time. Sooo....can it just be air inside the system ? And it spits out back into the tank and out in the small plastic pipe on the backside of the tank ?

"Update 2: Changed the thermostat, the old one was not that bad, and the coolanfluid was fine to.
Filled up again and turned on the engine, full fan and max temp....temperature was rising to 90degrees but still no heat...i drove home and i opened the hood, and the expansiontank was pressing out condensed air like hell from the little "escape" plug in the back of the tank.
And after about 10min when it stopped, the tank was on half.

It must be air in the system right ?
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
mckeenr
Audi A6
5
Oct 29, 2010 02:15 PM
Audi03-A4
B6 Models
3
May 2, 2010 12:47 AM
aturcotte
Audi A6
5
Jul 22, 2008 06:45 PM
misseswinky
Audi A4
8
Jul 16, 2007 12:44 PM
Peteman187
Audi A4
2
Dec 3, 2005 08:24 PM


Thread Tools
Search this Thread

All times are GMT -4. The time now is 05:26 PM.