Moroso Aluminum Expansion Tank

[Feffman]

It annoys me that Moroso does that when they even sell a level switch that fits the bung they put in the tank for the sight glass and would work with stock wiring setup

https://www.moroso.com/catalog/produ...num-bung63950/

I have bought one to test and prove it works to back up what im saying... I have some other welding work to get done so I might even use the bung that comes with it so i can have the cluster light back and still have the sight glass... very fancy haha

STAATS:

This is what's needed. I just called Moroso to see if they are willing to produce the existing tank with the bung. it's a one-off "custom" (ie: pricey) job. They are going to get back with me.

When you get this completed, assuming it works, could you please give details of location. with measurements, of the bung on the Moroso aluminum tank? I'm assuming you'll simply replicate the location from the OEM plastic tank to the aluminum (pronounced AL-U-MINI-UM for our British brethren) Moroso tank. This rids me of another fail point (split OEM tank) on the race car.

You get to be the guinea pig. By the way, thanks in advance.

Feff

[KhanArt]

Message Stash1, he has been running one for a while.

[topher]

My expansion tank actually just started leaking at the seam. So maybe ours IS failure prone? I was considering the moroso but still not really sure which direction to go. I usually prefer OEM unless theres an obvious benefit to an aftermarket part. This did only start after I topped off the coolant though. I believe the manual says to fill until the post is at the top of the fill hole right? Ive also heard that overfilling can cause them to leak. but from what it seems, I didnt overfill. but maybe its not recommended to fill that high? thoughts?

[STAATS]

Only hitch I don't care for with the Moroso tank is the loss of the coolant tank sensor.

"This revision is a direct replacement for the stock E46 M3 coolant expansion tanks and it does not use the factory sensor. Because of this you will need to short the wires to prevent the "Check Coolant" light on your instrument panel."

It annoys me that Moroso does that when they even sell a level switch that fits the bung they put in the tank for the sight glass and would work with stock wiring setup

https://www.moroso.com/catalog/produ...num-bung63950/

I have bought one to test and prove it works to back up what im saying... I have some other welding work to get done so I might even use the bung that comes with it so i can have the cluster light back and still have the sight glass... very fancy haha

[Obioban]

Seems like a downgrade to me. Heavier, loses the sensor. I could see it in a car with a failure prone stock tank, but that’s not us.

[Feffman]

Only hitch I don't care for with the Moroso tank is the loss of the coolant tank sensor.

"This revision is a direct replacement for the stock E46 M3 coolant expansion tanks and it does not use the factory sensor. Because of this you will need to short the wires to prevent the "Check Coolant" light on your instrument panel."

[Speed Monkey]

Costs a bit more...? According to ECS’s website, it costs 100% more than a new genuine BMW part. Granted, if your priority is to have a nice engine compartment, by all means get it; every fella who has 40wt coursing through their veins has bought something shiny for their sled. 😁

[bigjae46]

The M3s don't have the issues with the ETs that the non-Ms do. I think the aluminum tank will help with controlling water temps better. Aluminum can dissipate more heat than plastic.

[jayjpl]

Anyone here have experience with the Moroso Expansion Tank? I've heard the moshimoto ET for the non-m is terrible and that plastic is better, is this the same for the Moroso one? It costs a bit more than the OE, so I'm curious if its worth the switch.