Coolant Expansion Tank Part Number: 17137889450 Video documenting the current issue with leaking and splitting coolant expansion tanks on the BMW M5 & M8
Been watching your vids and they are really helpful thanks. I always wondered why good specialist like you don't hold stock? This is the type of established where I'd like to buy solid untouched examples and then start tunning it. I think theres a gap in the market for this. Id pay the premium to know all the failure points had been addressed first. It would also help with you warranting the work ...storage space and insurance are an issue i know , im probably missing something else obvious.
So another big question is does the new revised tank fix the issue permanently or not-otherwise why else did they revise the part with a new part number?
I’ve had to bring my G30 M550i in twice bc my injectors have been contaminated. They said the same thing. Luckily it’s been covered through warranty or it’d be and expensive bill.
They ALL have the coolant tank leak after a "few thousand" miles, most owners won't even notice tho untill they get missfires etc from the leak. I replaced it myself, wasn't too hard. Like a one hour job, just disconnect the two top lines with a towel and then be careful with the bottom line and hold the tank sideways. Fill up with what came out of the old tank and auto-bleed the system. As for the known startup stumble/stall: LPFP change was a pain tho, just empty the tank while driving to the bare minimum of fuel and use gloves and start wiggling the new pump around until you hear the final 'click'.
Curious what you guys think about these two questions: #1: Is the replacement stronger than original? Did BMW improve it? #2: If it's not improved, should we just replace it every 2 years? 2019 M5 Comp - happened at 30,772 Miles.
Mine is currently in the shop for this issue, almost the exact same mileage ~32k miles...leaked into 4 of my fuel injectors. Thank God I still had a month of warranty left lol
I got an F90 too and i got this slight white line (residue?) between in the edge area like you got. Seems normal i think or do i need to worry ? And does it come out from the top where you fill it or from the edges ? Thanks in advance :) !
Thanks for the info, I will pass it on , I’m surprised it would cause a potential problem , The coil packs and injectors have rubber seals to keeps water/moisture out 🤷🏻♂️, You can hose the whole engine down with water and have no issues , I believe the biggest problem of the S63s is there made out of Chocolate 😁
Injectors have no rubber seals, the rubber seals for the coils are more for dust and not water tight. Also electrical connectors on coils are above this rubber. I have had to replace 8 tanks so far and one company replaces tank every second oil change. Its a major problem
My M6 has forged pistons and rods from CP Carillo, My car currently has 860whp on map 8 29 lbs of boost with Meth injection for the past 2years , it’s the only way they can handle the power , BMW should use forged rods and pistons from the factory 🤷🏻♂️ other manufacturers do it , The S63tu4 isn’t any better , Chocolate rods and pistons made from wafers , My piston ring land broke and my piston cracked that’s why I built it
@@Antimatter. yea your lucky you have that done. I have the f90 and it really pisses me off that unlike Amg and RS which do forged internals from factory bmw are the only idiots that don’t do it. Even the new s58 in m3/4 use the same weak rods/pistons as the s63tu4 from the f90. I think overall the internals are still a little bit improved and revised/stronger from the f10 s63 to f90 s63tu4, but not by very much. At least on the transmission side of things unlike the dct which also needs to be upgraded on f10 to handle the extra torque, the zf8 in f90 stock doesn’t need that at least until about 850+ wtq. so more than enough on stock tranny even for an aggressively tuned stage 2- just the internals, pistons/rods are what really hold it back from its full maximum and true potential, unfortunately. In my case it’s stage 2 with 700-750whp and 980-990wnm max torque limit (based on dynojet numbers which read higher vs other types of dynos). Seems that at these power levels and keeping torque limited below 1000nm that is still ok and safe for the stock rods/pistons/engine/block to handle safely for long term use. Anything more than this and they will bend, certainly would happen if I tried pushing 850whp+ on the stock engine.
new tank doesn't fix the issue for everyone. several instances of leaking again. luckily i personally haven't had leaking reoccur but definitely plan on replacing with metal tanks once warranty expires.
Did I hear you right? Why would you need to replace engine due to shorted out injector circuit? Been in automotive industry for over 34 years, I have never heard of this.
Unfortunately yes, there have been injectors stick open and also injectors failing at high load causing lean conditions. You will see bmw have had to replace quite a few engines because of injectors and coolant leaking onto them.
Same issues on my F90 M5. LPFP failure and cracked coolant reservoir... This is pathetic from BMW on a car that's a few years old and still no recalls. I decides to fix it myself bc the dealership is booked until 2 months from now bc they have to fix recalls on EGR coolers lol wtf.
GREAT VIDEO. Saw the issue on mine, now got it booked to replace. Thanks for saving me big money before it got worse and bigger damage
Great video. Thanks for the heads up.
I would expect BMW should do a recall on this.
Appreciate the explanation and showing where it is to check!
best and most informative videos online, appreciate ya Tommy!
Great video, I remember this issue on my 335i, seems to have been fixed on my f82 but back again on the f90 🤯🥺
Had this issue on a mates car, at the end replaced 4 injectors 2 coils and new expansion tank with a new lid lol quite expensive
Can you do a video on how to change spark plugs n coil pack on the F90. I’m getting misfire on 5,6,7 cylinder
Been watching your vids and they are really helpful thanks. I always wondered why good specialist like you don't hold stock? This is the type of established where I'd like to buy solid untouched examples and then start tunning it. I think theres a gap in the market for this. Id pay the premium to know all the failure points had been addressed first. It would also help with you warranting the work ...storage space and insurance are an issue i know , im probably missing something else obvious.
Thank you!
Great video. Can you do a video on replacing the tank too please.
TYVM!
Is the bmw m5 f90 a good car? The engine is strong ?
So another big question is does the new revised tank fix the issue permanently or not-otherwise why else did they revise the part with a new part number?
Thank you for this video!
I’ve had to bring my G30 M550i in twice bc my injectors have been contaminated. They said the same thing. Luckily it’s been covered through warranty or it’d be and expensive bill.
They ALL have the coolant tank leak after a "few thousand" miles, most owners won't even notice tho untill they get missfires etc from the leak. I replaced it myself, wasn't too hard. Like a one hour job, just disconnect the two top lines with a towel and then be careful with the bottom line and hold the tank sideways. Fill up with what came out of the old tank and auto-bleed the system. As for the known startup stumble/stall: LPFP change was a pain tho, just empty the tank while driving to the bare minimum of fuel and use gloves and start wiggling the new pump around until you hear the final 'click'.
Where can I get one apart from bmw
Curious what you guys think about these two questions: #1: Is the replacement stronger than original? Did BMW improve it? #2: If it's not improved, should we just replace it every 2 years? 2019 M5 Comp - happened at 30,772 Miles.
Mine is currently in the shop for this issue, almost the exact same mileage ~32k miles...leaked into 4 of my fuel injectors. Thank God I still had a month of warranty left lol
I got an F90 too and i got this slight white line (residue?) between in the edge area like you got. Seems normal i think or do i need to worry ? And does it come out from the top where you fill it or from the edges ? Thanks in advance :) !
Not normal, needs replacement before it gets worse. I had the same problem, shitty quality from BMW just like the LPFP.
hey tommy do i need to worry about this issue with my 2015 LCi F10 M5 ??? since we share the same motor more or less let me know please
No f10 does not suffer this, on f10 coolant expansion is completely different design
@@velocitytuningltd appreciate the reply bro , anything i should look out for on the F10 M5 ? Im stage 2 FBO
Thanks for the info, I will pass it on , I’m surprised it would cause a potential problem , The coil packs and injectors have rubber seals to keeps water/moisture out 🤷🏻♂️, You can hose the whole engine down with water and have no issues , I believe the biggest problem of the S63s is there made out of Chocolate 😁
Injectors have no rubber seals, the rubber seals for the coils are more for dust and not water tight. Also electrical connectors on coils are above this rubber. I have had to replace 8 tanks so far and one company replaces tank every second oil change. Its a major problem
@@velocitytuningltd now, let us know how to deal with the weak rods so when we tune these the engine stays good long term 😊
The biggest problem is the s63 rods being made out of chocolate 🤣
My M6 has forged pistons and rods from CP Carillo, My car currently has 860whp on map 8 29 lbs of boost with Meth injection for the past 2years , it’s the only way they can handle the power , BMW should use forged rods and pistons from the factory 🤷🏻♂️ other manufacturers do it , The S63tu4 isn’t any better , Chocolate rods and pistons made from wafers , My piston ring land broke and my piston cracked that’s why I built it
@@Antimatter. yea your lucky you have that done. I have the f90 and it really pisses me off that unlike Amg and RS which do forged internals from factory bmw are the only idiots that don’t do it. Even the new s58 in m3/4 use the same weak rods/pistons as the s63tu4 from the f90. I think overall the internals are still a little bit improved and revised/stronger from the f10 s63 to f90 s63tu4, but not by very much. At least on the transmission side of things unlike the dct which also needs to be upgraded on f10 to handle the extra torque, the zf8 in f90 stock doesn’t need that at least until about 850+ wtq. so more than enough on stock tranny even for an aggressively tuned stage 2- just the internals, pistons/rods are what really hold it back from its full maximum and true potential, unfortunately.
In my case it’s stage 2 with 700-750whp and 980-990wnm max torque limit (based on dynojet numbers which read higher vs other types of dynos). Seems that at these power levels and keeping torque limited below 1000nm that is still ok and safe for the stock rods/pistons/engine/block to handle safely for long term use. Anything more than this and they will bend, certainly would happen if I tried pushing 850whp+ on the stock engine.
Mine had a pin hole so Small it was ridiculous, had it changed under warranty
Actually had to change tank on the shop car last week, was old part number and lasted just over a year
Just wondered if the same problem exists for the F10 M5?
It does not
new tank doesn't fix the issue for everyone. several instances of leaking again. luckily i personally haven't had leaking reoccur but definitely plan on replacing with metal tanks once warranty expires.
This was a video made around the time nee part number was released, check out out video testing 3 aftermarket solutions
New*
Did I hear you right? Why would you need to replace engine due to shorted out injector circuit? Been in automotive industry for over 34 years, I have never heard of this.
Unfortunately yes, there have been injectors stick open and also injectors failing at high load causing lean conditions.
You will see bmw have had to replace quite a few engines because of injectors and coolant leaking onto them.
Same issues on my F90 M5. LPFP failure and cracked coolant reservoir... This is pathetic from BMW on a car that's a few years old and still no recalls. I decides to fix it myself bc the dealership is booked until 2 months from now bc they have to fix recalls on EGR coolers lol wtf.
Did you just buy the updated part for the tank?
Just bought a new oem coolant reservoir and added some heat resistant glue to the whole seam. Seems to hold well for now...@@poisonova1