Login   
C6owners :: Forums :: C6 Support :: The Garage
<< Previous thread | Next thread >>

Coolant leak. De-aeration thingy at front of engine
Home   Forum Rules    Forum Help  Conversion Tools
   
Please Register to enjoy additional Member Benefits
Author Post
David_R   
Mon Jan 19 2026, 02:31pm
Joined: Sep 13 2025
Member No: #5956
Location: In a puddle of LHS
 Having finally pulled the plastic cover off the top of my engine, it's fairly obvious where I have been losing coolant to. The photo shows the bit that is leaking, which appears to just be a de-aeration chamber on one of the coolant lines.

What is this correctly called, and does anyone know if they are easily available and/or repairable, as it appears to be leaking from the join line.

Any guidance welcomed!
eke   
Mon Jan 19 2026, 04:08pm
Joined: Sep 16 2011
Member No: #624
Location: Oulu
 Hello, I think it is this one, part no 1351KV - Click Here -
Tjensen   
Mon Jan 19 2026, 09:30pm

Joined: Jul 17 2012
Member No: #954
Location: Bergen
 This part is a known problem and someone (in France) has produced a better version in metal/not plastic. Search the net.
MGmike   
Mon Jan 19 2026, 09:50pm

Joined: May 21 2017
Member No: #3151
Location: South Queensferry
Tjensen wrote ...

This part is a known problem and someone (in France) has produced a better version in metal/not plastic. Search the net.

Here it is: - Click Here -
David_R   
Tue Jan 20 2026, 09:27am
Joined: Sep 13 2025
Member No: #5956
Location: In a puddle of LHS
 Many thanks for everyone's replies. I did find the french website with the guy who makes these from stainless steel, and thought it was a great fix. I am, however, not about to spend over £100 on one tiny bit of the cooling system.

The fact that the hose assembly complete is still available (I hadn't found that) is good news... I'm still a little loathed to spend £40 on what should be a few quid, but it's good to know you can get it.

I think I am going to go with my first plan of cutting the unit in half and bonding it back together. Either that or replacing it with a straight-through pipe with a tee for the bleed point. I've had de-aeration pots on various Citroen vehicles split over the years, and have almost always just deleted them and run a pipe straight past with no ill effects.

But if it all goes wrong, I can always buy the £40 one from above.

Cheers all.
M2dis   
Thu Jan 22 2026, 03:58pm
Joined: Mar 20 2018
Member No: #3475
Location: Tartu
 - Click Here -

here is one plastic with hose
C6Dave   
Thu Jan 22 2026, 04:05pm


Joined: Oct 01 2009
Member No: #1
Location: Northumberland
David_R wrote ...

Many thanks for everyone's replies. I did find the french website with the guy who makes these from stainless steel, and thought it was a great fix. I am, however, not about to spend over £100 on one tiny bit of the cooling system........

But if it all goes wrong, I can always buy the £40 one from above.

Cheers all.

The £40 is out of stock now, alternatives are near 98 euro so at that price I would go for the stainless one...
Website
 

Jump:     Back to top

User Colour Key:
Head Administrator, Administrator, Technical Expert, C6 Premier Discount Club