Universal aluminum expansion tank

torbearfree

Private
Jan 2, 2020
41
10
0
I have a hairline crack in my 1 year plastic expansion tank. The only N54 specific AL expansion tank is made by Turner and costs $500.

I was thinking off adding in a universal expansion tank. I would have to modify the coolant level sensor and I would have to modify the thermostat hose. I would also need to make some mounting brackets.

I have not had much sleep lately, am I mad or am I on to something?

610CS1UADjL._AC_SL1500_.jpg
 

derekgates

Lieutenant
Feb 23, 2018
740
375
0
NW FL
derekgates.us
Ride
2011 335is
hmm, I agree with your sentiments for wanting aluminum.


I recently had a crack/leak with my expanstion tank and I went with an OE supplier tank. It is soooooo much cheaper. I went 9 years on the original tank, 103k miles.... so it hurts to consider $300-500 tanks.



Anyway, I am interested in freeing up space on the passenger side... :D
 

torbearfree

Private
Jan 2, 2020
41
10
0
The one in my OP costs around $40 on Amazon. Its made in China. I would leak test it before installing it. The $300-$400 tanks look very nice but the price does not, at least for me.
 

JohnDaviz

Lieutenant
Jan 6, 2019
849
555
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Ride
335i E92 DCT
Look around on Aliexpress. Speedwow is also only a reseller of these parts.

I have already bought parts from them and they are decent quality. But if you do your research you will find the exact same parts from a ton of other sellers and the prices vary very often a lot.
 

bahn

Sergeant
Platinum Vendor
Nov 5, 2016
250
414
0
Iowa
Do you have any pictures of it installed?
I installed the radium tank awhile back. See below, I also included instructions on eliminating the large cross-over hose further down.

 

derekgates

Lieutenant
Feb 23, 2018
740
375
0
NW FL
derekgates.us
Ride
2011 335is
I installed the radium tank awhile back. See below, I also included instructions on eliminating the large cross-over hose further down.


holyyyyyyyyy shit... that's a damn build. Very impressive.

Yeah, the Radium Tank looks great. šŸ˜‚