[Proxkiller]

EDIT: I’m not sure if this just came out but it’s a catch can for the coolant that reroutes it to a safer area once your tanks eventually leak
https://1evel.us/products/f90-m5-f9x...lant-catch-pan




I new to the forums so I apologize if this is beating a dead horse.
I am purchasing a 2018 M5, I had an inspection done and there is some coolant residue on the tank. I have read a bunch of posts here and I know it’s a common issue so I have already bought one for replacement, dealer is gonna pay for it.

My question is has anyone tried putting extra sealant where the two pieces meet? Like a high temp silicone?
I could be wrong but is it leaking because of high heat near the cats? And if so can I wrap it the tank in reflective tape to mitigate the heat a little?

[pmsteinm]

The SIB said the coolant was attacking the tank, so it seems to me like sealant and insulation won't do you any good. Supposedly the new tank part number fixes this but time will tell.

My plan is to monitor the tank and if it leaks replace it (under warranty while it lasts then DIY).

[AHall]

Originally Posted by Proxkiller

I new to the forums so I apologize if this is beating a dead horse.
I am purchasing a 2018 M5, I had an inspection done and there is some coolant residue on the tank. I have read a bunch of posts here and I know it’s a common issue so I have already bought one for replacement, dealer is gonna pay for it.

My question is has anyone tried putting extra sealant where the two pieces meet? Like a high temp silicone?
I could be wrong but is it leaking because of high heat near the cats? And if so can I wrap it the tank in reflective tape to mitigate the heat a little?

A member here applied heat reflective tape and I believe insulation around the turbos. I would apply the tape if I were changing tanks. I do not think it will hurt anything.

[imperfectluck]

Originally Posted by pmsteinm

The SIB said the coolant was attacking the tank, so it seems to me like sealant and insulation won't do you any good. Supposedly the new tank part number fixes this but time will tell.

My plan is to monitor the tank and if it leaks replace it (under warranty while it lasts then DIY).

If I’m not mistaken I believe I read in another thread that the issue showed up again with the new part number. I would hope the new part fixes the problem but I also read another forum member trying to make a new expansion tank that also was buried in the same thread I believe.

[Frupal]

Originally Posted by imperfectluck

If I’m not mistaken I believe I read in another thread that the issue showed up again with the new part number. I would hope the new part fixes the problem but I also read another forum member trying to make a new expansion tank that also was buried in the same thread I believe.

Does anyone else find this 100% ridiculous? That BMW can't engineer a part a simple as this without all of this crap? Come on! Hey BMW! If you're reading this: GET YOU EFFING ACT TOGETHER!!

[warpeacelove]

People should gather together and pursue a class action lawsuit

[jnotrom711]

Originally Posted by Frupal

Does anyone else find this 100% ridiculous? That BMW can't engineer a part a simple as this without all of this crap? Come on! Hey BMW! If you're reading this: GET YOU EFFING ACT TOGETHER!!

LOL, I agree...

But most manufactures arent much better....

I have a G63 AMG, and luckily was covered under warranty for now... but... the MB w177 motor (4.0L V8 TT, same thats in the E63, and AMG GT, and others) has an issue with the 2 oil vapor separators which are largely a completely unnecessary part, it basically routes oil burn off vapor back into the cylinders instead of into the atmosphere (so its an emissions thing) but the oil vapor separators (about a 200.00 part) get clogged, and create too much pressure in the cylinder block. And what happens to the oil? moves to the path of least resistance... what is that on the w177 motor?.... a little thing called the rear main seal...

So ya, just found that out and got lucky it's covered for now, but a $200,000.00 G63 with 27000 miles on it had a leaking rear main seal. $12,000.00 repair caused by a shit design on a $200.00 part. They obviously have to drop the transmission for the rear main seal... and for the oil separators they're under neath the 2 intercoolers and is actually quicker and easier to drop the entire ENGINE to change them out... What a joke.

So keep that in mind on any 4.0L V8 TT AMG car.... if ever in the market

[Proxkiller]

Originally Posted by imperfectluck

If I’m not mistaken I believe I read in another thread that the issue showed up again with the new part number. I would hope the new part fixes the problem but I also read another forum member trying to make a new expansion tank that also was buried in the same thread I believe.

I saw velocity tuning’s video about his “revised” part also leaking, I bought an extra one to have because it seems like it’s a matter of time until they fail.
The vehicle has downpipes that are heat wrapped and I will tape up the tank when I pick up the vehicle
Idk if the failure is happening within the tank or from outside elements

[Proxkiller]

Originally Posted by warpeacelove

People should gather together and pursue a class action lawsuit

Bare minimum there should be a voluntary recall for all m5s and an actual revised part.

[vanos84]

Glad I got mine replaced under warranty. I just hope it holds together!

[warpeacelove]

Originally Posted by vanos84

Glad I got mine replaced under warranty. I just hope it holds together!

According to someone that replaced the cap, it didn't solve the problem.

[vanos84]

Originally Posted by warpeacelove

According to someone that replaced the cap, it didn't solve the problem.

I think they replaced the whole tank on mine but I'm not sure it's any different from the original...

[micvite]

I think it's funnier they didn't just stick it where the f10 had the tank, looks to be essentially empty space there so I'm sure they couldn't just left it where it used to be without issue.

[MikeFish]

Has anyone looked at moving the tank into the empty space adjacent to it (under the removable cover)?
Or maybe making up a cover to divert any leaking water away from the injectors?

[PetroM5]

Originally Posted by MikeFish

Has anyone looked at moving the tank into the empty space adjacent to it (under the removable cover)?
Or maybe making up a cover to divert any leaking water away from the injectors?

Someone is working on a solution.

https://f90.bimmerpost.com/forums/sh...7&postcount=71

[pbonsalb]

A relocation kit would also be interesting. Probably need hose extensions and a bracket. If relocating, a different shaped aluminum tank would likely also be possible.

[AHall]

Originally Posted by pbonsalb

A relocation kit would also be interesting. Probably need hose extensions and a bracket. If relocating, a different shaped aluminum tank would likely also be possible.

pbonsalb if a aftermarket tank were to be available what are your thoughts on integrating the sensor molded into the existing tank? I assume the sensor is a level sensor. Seems like someone could develop a aftermarket sensor that could plug directly into the existing mating connector and screw into an aluminum/replacement tank. This set up would not require relocation.

[pbonsalb]

The level sensor is just a 2 wire sensor that completes a ground path to trigger a light. Should not be hard to find a substitute. Not sure about a harness end adapter. Could try cutting off the stock sensor end to see if there is something inside you can work with. Otherwise, cut and splice but leave enough pigtail to re-attach the stock harness end if necessary one day.

[NoMods]

Looks like IND sells the level tank shield for $650

[Proxkiller]

Originally Posted by PetroM5

Someone is working on a solution.

https://f90.bimmerpost.com/forums/sh...7&postcount=71

Looks like they’re on the market

https://1evel.us/products/f90-m5-f9x...lant-catch-pan

[NoMods]

https://youtu.be/rdUNO_ms9xA?si=35ajWQAtVCuHLRe6

also it looks like the maker is already discounting it versus buying it from IND for full MSRP

[Proxkiller]

Easy install, $500 isn’t a terrible price either