[F87source]

Originally Posted by NSXR

I never even knew this was a thing!



Overkill?

Yeah it's an issue on the n55 lol, I replaced mine last summer.

[F87source]

Originally Posted by jefe2000

I’ve been trying to pin down the location of this bolt. There’s not much to go on that I’ve found so far. As far as I can tell, it sits under the main crank pulley on our cars, is that right? And it looks like you’ve gotten at it from the top rather than underneath the car?



The charge pipe is still on my “yeah, I should get around to that” list. I’ve procrastinated mostly because it looks like a bear of a job for one person. Let us know how it goes!



Feels early. I plan on getting after the water pump on mine around the 60K mile mark.

It's sits at the 7 o clock location in respect to the crank pulley, you can see it without removing the crank pulley. But when I did it last year I removed everything, from the intercooler to the radiator and crank pulley. This was because I was upgrading the e tire cooling system.

[jordantii]

Originally Posted by F87source

No, this hose isn't present on the s55

Thanks for the response.

[F87source]

Originally Posted by DocWong

Ah ha!!!

It was the infamous water pump ground bolt!

Now, while I’m at it: Mickey Mouse flange/hose, turbo intake, turbo boost pipe, intercooler, charge pipe, diverter valve, malo main seal plate, serpentine belt and flush.

I’m debating on changing the water pump/thermostat. At 40k miles? What do you think?

You can technically wait till the thermostat fails completely before replacing it because on bmw's the thermostat fails open by design, which is a super genius move by bmw, and this means you don't have to worry about over heating if the thermostat fails.

In terms of the water pump I might as well do it at this point if I were you, the mileage is getting up there and everything is already out.

[DocWong]

Here’s photos of the water pump ground cable with the broken stud in the hole.

Hmm question is, how do I get that out?

[F87source]

Originally Posted by jordantii

Thanks for the response.

No problem

[F87source]

Originally Posted by DocWong

Here’s photos of the water pump ground cable with the broken stud in the hole.

Hmm question is, how do I get that out?

Use a bolt extractor, you'll need to remove the intercooler and radiator and front bumper for enough room to really get in there

[jefe2000]

Originally Posted by F87source

Use a bolt extractor, you'll need to remove the intercooler and radiator and front bumper for enough room to really get in there

I think an alternative is to use the empty bolt hole on the block that’s just above and to the left. Indicated in the orange circle:

[jefe2000]

Originally Posted by F87source

Yeah it's an issue on the n55 lol, I replaced mine last summer.

A bit more info about the water pump ground bolt here:
https://www.fcpeuro.com/blog/bmw-n55...lt-replacement

And an accompanying video here:

None of that is F87-specific, though.

[F87source]

Originally Posted by jefe2000

I think an alternative is to use the empty bolt hole on the block that’s just above and to the left. Indicated in the orange circle:

Yes that is an alternative, iirc someone else on here posted that they used that other hole.

Personally my OCD would drive me nuts leaving that bit of broken bolt in there haha. It shouldn't be hard to remove since the bolt is aluminium so drilling it and then using an extractor is easy. As long as the intercooler and fan is out it shouldn't be too hard to access it. I would also remove the front bumper too.

[DocWong]

I’m just going to use that extra hole!

As for the expansion coolant return hose: the kink is the problem and this is possible solution assuming there is clearance from the hood:

[John wk]

Originally Posted by F87source

You should probably look at the water pump at this point, especially if you track the car. Other than that just the expansion hose, mickey mouse flange from the cylinder head, and water pump ground bolt. If you track your car you really need to replace things prematurely, otherwise you risk ruining a really expensive track day, also having a cooling system failure while pushing your engine 10/10 is a good way to blow a motor.

GThanks to you and xutvet, you are great experts on m2 and I appreciate your messages and that I learn a lot. I am going to carry out maintenance next week on oil, spark plugs and filter, I am going to take the opportunity to change the coolant return hose and following your advice I am also going to change the Mickey Mouse flange, the problem is that I can't find what the Mickey Mouse flange is by translating it into Spanish because in Spanish it is not called like that. I know where it is and I have it located but I don't know exactly what it is called, can you please give me the reference number of the original BMW part, I really appreciate it.That bolt, which I don't know what part it is, I think it's for the fan because of the translation. I'll change it when I change the intercooler and the charging tube.

[3t3p]

Is this the same tube that rein and ecs sell that F87 source reviewed?

If so going to look into it as my car is MY2016 and I doubt this has ever been replaced!

Def don't want to be stranded!

[F87source]

Originally Posted by John wk

GThanks to you and xutvet, you are great experts on m2 and I appreciate your messages and that I learn a lot. I am going to carry out maintenance next week on oil, spark plugs and filter, I am going to take the opportunity to change the coolant return hose and following your advice I am also going to change the Mickey Mouse flange, the problem is that I can't find what the Mickey Mouse flange is by translating it into Spanish because in Spanish it is not called like that. I know where it is and I have it located but I don't know exactly what it is called, can you please give me the reference number of the original BMW part, I really appreciate it.That bolt, which I don't know what part it is, I think it's for the fan because of the translation. I'll change it when I change the intercooler and the charging tube.

I have a review for the mickey mouse flange here: https://f87.bimmerpost.com/forums/sh....php?t=2113864

It should how to change it as well.



OEM part number is: 11537598234

[F87source]

Originally Posted by 3t3p

Is this the same tube that rein and ecs sell that F87 source reviewed?

If so going to look into it as my car is MY2016 and I doubt this has ever been replaced!

Def don't want to be stranded!

The pipe here on this thread is not the same one I reviewed, it is completely different and there are no aftermarket solutions unfortunately.

This is the thing I reviewed that you referred to: https://f87.bimmerpost.com/forums/sh....php?t=2113864

[3t3p]

Originally Posted by F87source

The pipe here on this thread is not the same one I reviewed, it is completely different and there are no aftermarket solutions unfortunately.

This is the thing I reviewed that you referred to: https://f87.bimmerpost.com/forums/showthread.php?t=2113864

Thank you!
So order an OEM part and get it done as preventative maintenance?
Anyone got part No?
It's quick for a mech to do?
Cheers

[F87source]

Originally Posted by 3t3p

Thank you!
So order an OEM part and get it done as preventative maintenance?
Anyone got part No?
It's quick for a mech to do?
Cheers

Part number: 17128570061

FCP Euro (aftermarket REIN): https://www.fcpeuro.com/products/bmw...in-17128570061

FCP Euro (genuine BMW): https://www.fcpeuro.com/products/bmw...ve-17128570061


Yeah pretty much just preventatively replace these things, I always tug and bend these hoses at the connectors to ensure they're still ok at every oil change. But eventually I will preventatively replace them.

This is a super simple job because everything is at the top of the engine bay (just use bags to prevent coolant spills), it is literally a 2 minute job if you're fast or 5 minute job max. Then followed by a built in coolant bleed cycle.

[3t3p]

So is it about perishing of the rubber itself or the plastic end connector or both?!

Feel like a preventative recommendation n55 thread could be good?

Like Malo crank seal, charge pipe, any other nick nacks people know of?

[NSXR]

Originally Posted by 3t3p

So is it about perishing of the rubber itself or the plastic end connector or both?!

It's the heating and cooling of the part that makes it brittle and causes it to crack over time. That it cracks in a certain place is indicative of stress in that area.

[F87source]

Originally Posted by 3t3p

So is it about perishing of the rubber itself or the plastic end connector or both?!

Feel like a preventative recommendation n55 thread could be good?

Like Malo crank seal, charge pipe, any other nick nacks people know of?

For the mickey mouse flange:

The hose is pretty durable but does eventually fail from oxidation, heat cycling and ozone damage.

The plastic connector also fails from heat cycling making it brittle.



For the hose in this thread:

Heat cycling causes the plastic to go brittle and fail.




Other mods would be: charge pipes, malo crank seal plate, turner magnetic drain plug for the engine oil and diff, that's pretty much what I can think of off the top of my head. I probably have done more but can't remember haha, it's probably in my mod list if I've already done it.


Edit - rotor set screws: https://f87.bimmerpost.com/forums/sh....php?t=2107443,
Mud flaps: https://f87.bimmerpost.com/forums/sh....php?t=2044667,
Door jamb PPF: https://f87.bimmerpost.com/forums/sh...php?p=30312066,
Coolant bleeder screw: https://f87.bimmerpost.com/forums/sh....php?t=2115587,

[John wk]

Originally Posted by F87source

I have a review for the mickey mouse flange here: https://f87.bimmerpost.com/forums/sh....php?t=2113864

It should how to change it as well.



OEM part number is: 11537598234

I am truly grateful. You are an encyclopedia M2.. It's a blessing to have people like you on the forum and to be able to learn from the other side of the world. Thanks source f87 I love learning about cars, but especially about mine. Do you think there is a problem with fitting another OEM? The only downside would be that in 7 years I would have to spend another 50€. My mechanic tells me he would change the whole thing, including the hose and expansion tank tube, for about 90€. My car has 78k and has had DKG gearbox oil done. Next week I'm going to do engine oil, spark plugs and filters, change the expansion tank hose and change the Micky Mouse flange and tube In the near future I'm thinking about the ground bolt, water pump and how to improve the intercooler and DO88 charging tube and I think that with that I'll be ready for a season.

[EvasiveF87]

Piggy backing along on this, my OG is sitting at something like 40,600 miles and it’s a 2017.

The engine bay is pretty damn clean. Hoses and everything look healthy but this looks like a pretty easy DIY and the part from BMW is only $42 so I might replace for the sake of being safe than sorry.

My question is on a car that hasn’t had it explode / break what would the process be to install? Is bleeding the system necessary?

From what I’ve seen you can just let the car sit overnight, pull that hose, top off coolant if necessary and pop out the bleeder screw for a few seconds and that’s it.

My car just recently professionally had the coolant flushed so I don’t want to risk compromising that job and spending more money lol