High Temperature Coolant Reservoir Failure

[Eric]

What evidence can you see @DenisM? Is it losing pressure also?

I wiped off what I believe was white cyano adhesive powder residue from both my reservoirs maybe six months ago and it hasn't returned. I've seen similar pics posted with that same white residue so assumed it's a leftover from manufacturing.

I have had that white residue on both reservoir seams for the last 14000 miles, with no issues, I thought it was common on BMWs!

 

[bakepl]

Have same white ring around my tanks, certainly not as bad as image in previous post here but strong smell of coolant under bonnet after driving. Mentioned it to the agent here and they'll take a look when handles are replacing in a few weeks.

 

[CRH]

If you have the white leak marks, they need replacing, and will under warranty, your HVAC will improve

 

[Tom109]

The residue is dried coolant scum, not CA adhesive residue.

 

[Mountain4x4]

I hope they get caught up on making 30,000 replacements soon. These parts suppliers these days.....

 

[parb]

Is there any particular coolant you guys recommend?
I don't have the problem but i figure i'll put a bit of coolant with my recovery gear if i go for a long trip.

any special procedure is just dump it in?

 

[Tenac]

Is there any particular coolant you guys recommend?
I don't have the problem but i figure i'll put a bit of coolant with my recovery gear if i go for a long trip.

any special procedure is just dump it in?

I use the BMW recommended concentrate with distilled water. You can do a premix before you head out.

You can find it on FCPEuro Genuine BMW 82141467704

 

[Tazzieman]

I hope they get caught up on making 30,000 replacements soon. These parts suppliers these days.....

Just send me the file and Temu can print me another one.

 

[Mountain4x4]

I agree, not hard. But when you go to a supplier and say, you got to eat everyone you ever made for us as they were not made right....yikes. Half million dollar loss, not huge in the grand scheme...but still.

 

[Clark Kent]

Do a Google search on BMW expansion tank leaking and you'll find reports of this going back 10+ years so it's not an Ineos specific issue but they seem to be using the same supplier.