Coolant expansion tank

N54gasm

Corporal
Feb 6, 2017
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New Freedom
www.Spoolnmotorsports.com
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2008 bmw 335i m sport
After some searching for no real good alternative to our expansion tanks, especially when we relocate it, decided to make my own. After designing, I see that doc race plans to release a billet version of it (very purty piece). This is prototype one, am making another prototype that mimics the stock tank, but shorter/compact to fit in the typical relocation spot (as well as a new power steering res, soon to come).

Here is the progress so far, fits above the fan, waiting on a cap/bungs to finish, as well as some mounting brackets.
20180605_214317.jpg
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screaminfast

Sergeant
Feb 18, 2017
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Rochester NY
mikecentola.com
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07 SG/CR 335i / 17 X6 x35i
Looks good man. I am going to work with VIE to do a dual coolant and power steering res. I don’t want to do it above the rad because I put in the diesel air snorkel.
 

N54gasm

Corporal
Feb 6, 2017
225
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New Freedom
www.Spoolnmotorsports.com
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2008 bmw 335i m sport
This is just prototype one. The other is going to go in the spot you normally relocate the stock to, on the driver side but it fits much better lol. And ive done plenty of combo units in the past with oil catch can/coolant overflows, not a bad idea actually with power steering and expansion tank.
 

screaminfast

Sergeant
Feb 18, 2017
260
140
0
Rochester NY
mikecentola.com
Ride
07 SG/CR 335i / 17 X6 x35i
This is just prototype one. The other is going to go in the spot you normally relocate the stock to, on the driver side but it fits much better lol. And ive done plenty of combo units in the past with oil catch can/coolant overflows, not a bad idea actually with power steering and expansion tank.

Yeah I vent PCV to air so I don’t really need the catch can. But it’s be nice ditch the leaky PS reservoir.
 

doublespaces

General of the Army
Oct 18, 2016
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I wonder if it can be made to have ducts to still route the air to the passenger side? I may be interested if someone did that.
 

doublespaces

General of the Army
Oct 18, 2016
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This is prototype 1. The other one im making will fit on the driver side where its normally relocated too, but fit much nicer.

This one is just easier to test out the stock sensor on.
I have no interested in the relocated one, I was just curious if there could be a center mounted version that doesn't block the air flow, but instead has passages somehow to direct airflow to the passenger side by the intake cones This would probably be too complicated but, hey I like things that way.
 

PaulKendall

Specialist
Nov 12, 2016
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Omaha NE
I am about to try the x5 tank in my car since im putting in a forward facing intake. If that doesnt work im not sure what my plan is. Cant wait to see your next design!
 

Sshec152

Corporal
Nov 3, 2016
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Aston pa
I’d definitely recommend a metal brake so you can bend most of the edges so you have way less to weld and it looks much cleaner but other than that it looks good, I’ll probably be picking one up
 
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Sshec152

Corporal
Nov 3, 2016
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Aston pa
Also if you dont wanna deal with the stock sensor you can put a jumper wire in the harness to get rid of the warning light
 

N54gasm

Corporal
Feb 6, 2017
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New Freedom
www.Spoolnmotorsports.com
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2008 bmw 335i m sport
I’d definitely recommend a metal brake so you can bend most of the edges so you have way less to weld and it looks much cleaner but other than that it looks good, I’ll probably be picking one up

I have one, just not quite big enough for this (NOT what she said). And thanks. This will be improved upon lol.

Also if you dont wanna deal with the stock sensor you can put a jumper wire in the harness to get rid of the warning light

Yes, but I like having the sensor personally.