How to: Fix N63 Leaking Coolant Lines (Alpina B7 EDITION)

Today, we're going to be working on this unique Alpina B7 BMW and replacing the leaking coolant lines for the turbos which are known to fail pre-maturely causing a coolant leak and smell from the engine. The Alpina N63 motor has some key differences and upgrades over the original that make it more powerful, and reliable as you'll see!
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[@StefanThePro]

Finally got the leak on my 2009 750li with 125,000 km’s - replacing it all with silicone and metal tee’s & wye’s. So glad you posted it for others to see - did all of the hoses, on a warm engine in about an hour, including disassembly and changing filters.

[@carrier7676]

Dude! Best of luck with the Alpina! From what Ive heard, those things are crazy hard to work on! That brass and metal "T" connectors looks like a great fix though! You got this man!!!

[@honorablewiz7447]

Well... it can't be any harder than a BMW

[@buildyourbrand]

Man you rock!!! I just had to replace my t-connector. Those same houses were leaking. So happy only the top hoses.

[@Nico_335i_DCT]

Very nice fix Chris! The metal T connections are a great choice. Have a great week, Dutch regards, Nico.

[@zanewarren2774]

Nice video man. I just did my pcv valves yesterday , injectors and spark plugs. Got maf sensors on the way. Brake pads and rotars. Fresh 5w40 liqui Molly oil with 2 can of Oil saver to lower consumption. These cars LOVE MAINTENANCE LOL

[@honorablewiz7447]

I just wanted to say thanks... this helped me my 2014 f15 x5 50i

[@joesevier2034]

Great video, it really gave me important information about the coolant system on the n63 engine especially the best material to use hose adapters. Prevention is the best cure on this BMW engine.

[@user-se4gi4nr2f]

great vid for n63s!

[@awesomebase]

Great job, looks real good! Maybe I missed it in the video, but did you break out how much time it took you (approximately)?

[@brushenas]

great job & video

[@TheBimmerBarn]

Thank you!

[@melrosabal3564]

Great job 👏

[@TheBimmerBarn]

Thank you! 😃

[@imurray798]

You the goat my guy 🤓

[@joelistenbee]

Nice video

[@pinakidas397]

You made my day - had the leak at the same place

[@TheBimmerBarn]

Literally such a common leak 😭

[@pinakidas397]

@@TheBimmerBarn Can you please make a video on 4X4 malfunction? It is driving me nuts - thanks in advance :)

[@edgarzalewjasko7625]

Witam , mam ten wyciek na dole jakiej średnicy ten trójnik mosiężny ?

[@jb.2986]

Great vid. What year is this Alpina B7. Is this the T63U version 3 motor? We have a 2021 X7 M50i. I’ve read many of the earlier issues have been addressed in the later N63’s. Thanks. Subscribed!

[@kingofnewyork3]

What are the part numbers on those hoses you replaced and pvc hoses that was broken that is a main oil consumption and burning out the tail pipes I’ve heard.

[@rayyoung5360]

Good video, that motor looks very intimidating to work on.

[@user-fh6tu6ni6g]

very nice video but where are the parts numbers and where can you get the hoses from?

[@mirek90_09]

Thanks for your detail video 👏🏻👏🏻👏🏻 and just question.. what is this music? I like it 😁

[@gregtaylor7402]

Bro can you add link to the T part you changed under alternator

[@EdoardoJacucci]

Thanks for the video. I just had the coolant system on my 750i G11 (2016) replaced due to leakage. Exactly as shown here. It is pretty amazing to me that BMW puts all this rubber and plastic near the hottest part of the engine. It is a matter of time before it breaks down. I am just wondering what will break next...

[@misterlauu]

I'm having issues with my 2016 G12 as well. What did you end up replacing? The diagnosis for me was the connector from the reservoir to the lines going to the heat exchanger/radiator. Was squirting everywhere.....

[@Ihrtbewbs]

What size are the one time use hose clamps?

[@kato3000]

Where did you buy the parts? I have been trying to do a good bit of research to know what all parts I need.

[@harley22x]

I'm trying to locate a coolant leak on my S63 engine. It's in the same area, causing my alternator to fling water everywhere. I replaced the plastic Y with a metal T, and it's still doing the same thing. The fitting doesn't look wet, but there's coolant back there. It sprays out and get all over everything. I checked the hoses for holes or tears, and I don't see anything anywhere!! It looks fine! I don't get it. Is there another secret water line up around the alternator somewhere? I am at a loss.

[@wkhoe]

so how did you bleed the system? Since the coolant reservoir is placed lower than the upper coolant lines...

[@melrosabal3564]

I have the 2013 n63 tu any recommendations out there ?

[@thewolf61691]

I have a n63tu3 in a m850i and dealer says leak test reveals no leaks but I smell coolant near radiator after engine shutdown and have to refill every 7k miles or so, very frustrating. Coolant reservoir and engine valley are dry.

[@SrtHemiPower]

Do you know the size of the hoses

[@younglee4924]

hey, man do you have to bleed the coolant before doing any of this work?

[@imurray798]

Hey do you have part number for hoses ?

[@user-do6ur6su3y]

Good video! But, in the end, there is no need to top up small fluid tank, because it is for separate coolant circuit that cools air with 2 intercoolers. So it is not for cooling turbos, turbos are cooled by main circuit, so you need to top up the main fluid tank. Did you run the proceedure of air bleeding? Since during first start after repair lines are full of air and no water is coming through turbo it is very significant

[@kingofnewyork3]

How do you bleed it?

[@user-do6ur6su3y]

@@kingofnewyork3 by ISTA or without a computer run special procedure. Ignition on, set temp 28 degrees, fan minimum, AUTO, press gas pedal for 10 seconds then electric pump will engage. Total procedures lasts for 12 minutes. Did this several times, sometimes helps, sometimes not

[@Nytro423]

Can you put a link on where to buy this stuff pls

[@theekeezy]

what size t fitting for a 2013 bmw 550i twinturbo?

[@Joegarabet]

hey bud, how many miles on this? im having the same issues ( '16 650i 55000mi) w coolant lines all crusted at the connections/clamps. great vid.

[@TheBimmerBarn]

160k on this motor!

[@sirmo667]

How’s it holding up now?

[@gixxermike6642]

Any chance you have a parts number list for this? Want to do the exact same thing... thanks for the video!

[@lilkd1433]

Its called a Brass T valve i use them at work you can find them at your local parts store.

[@MrCamaroz28ss]

I think a y brass will be better for the angle

[@6612136662]

@@lilkd1433 3/8

[@HollywoodMechanic]

Bmw, or specifically rolls royce, claim the metal T fittings get a lot hotter than the plastic counter part and cause hose swelling and splitting earlier than if used with a plastic piece. While the T won't break, the hoses will and at an accelerated rate.

[@tossftw7228]

It's simple... Do thermostat change for coolant stay more cool, and ad some motul moocol to help coolant stay at lower temp. This engine work very hot in summer.

[@jean-raeanderson1437]

@@tossftw7228what’s the thermostat change

[@pdef1949]

What doesn't make sense to my engineer's mind is why BMW can't use higher temperature plastics under the hood. Deteriorating plastic parts have been a known problem since the 1995 Ee38 740 and 750. One more question: did I see that you are installing some replacement hoses? Did you use OEM parts or aftermarket hose?

[@E70MGarage]

BMW uses biodegradable plastics that have a certain life/heat cycles, hence they fail. I wonder if they can use metal instead 🤔 but then again BMW's ideal consumers will not use their cars past 30-50k miles (that's why they market certain oils as lifetime fluids).

[@freddyjimenez6328]

Thanks for the great video. If available, will you please provide the BMW part number for the pack of pinch clamps.

[@pdef1949]

I do NOT recommend pinch clamps. If for any reason the joint needs to be made tighter, that clamps can't be adjusted and are difficult to removed. Get the standard screw-type clamps.

[@mbashir393]

What about the hose pipes can they be used aftermarket or have to be by bmw

[@philipdefranco2340]

@@mbashir393 one point.....some of the hoses are molded by BMW. It will take a bit of doing but the model shapes can be replaced with the metal tubing fittings and fresh hose. Sorry I didn't make a video of the work I did.

[@user-xs3jw3wy8b]

Hey there. At 5:39 mins through you show the plastic covers / air ducts that bolt onto the turbos. To access the single bolt on each side, does one have to removed the air ducts to the intercoolers on an S63 E70 X5m? It looks like a very similar set up. I have tried to get to the single bolts but no luck, so i guess i may have to bite the bullet and take them off.

[@TheBimmerBarn]

Yep gonna have to make room somehow! Thanks for watching and good luck mate

[@user-xs3jw3wy8b]

@@TheBimmerBarn awesome, thanks for that.

[@chadmorrison6742]

How many hours did this take you?

[@animalworld5534]

Can you hide me to part numbers for tge hoses?

[@fastboatster]

Was this samcrac’s Alpina b7?) I mean LegitStreetCars’, of course, hard to tell those 2 apart for some reason)

[@rohanbajpai4203]

That's exactly what came to mind when i saw the exterior of the car!

[@TheBimmerBarn]

He'd had this car for several years now, and if I recall correctly, the last owner was a basketball/football player of some sort. The spec is similar though! Thanks for watching 😊

[@bobratcliffeify]

what would this cost to do?

[@casapadilla1909]

Didnt seem too bad of a job, but isn't there return lines under the turbos that also need replacing?

[@TheBimmerBarn]

The oil return is below the turbo yes, but didn't appear to be leaking on this car! Definitely poke around with a flashlight and make sure yours are good too 🔦

[@albertseda8431]

what is the size t fitting are you using I'm having the same issue

[@TheBimmerBarn]

I think it was 1/4in hose barb fitting or maybe 5/16in

[@kingofnewyork3]

What size is the T connector?

[@arp5566]

Does anyone know the size of the T fitting

[@runjee0074]

3/8”?

[@fmspec]

i had same problem but they repaired the whole line coasting me $$$$

[@brianvelasquez3120]

Are all the lines 3/8? Aswell as the brass t’s?

[@pdef1949]

On my F01 750i MSport, the hoses are 12 or 13 mm. I recommend you get 1/2" tees. The shorter hoses can be replaced by 1/2" ID radiator hose. There is one hose that is molded into a 90 ell.....you can make a new assembly by using a 90 deg brass ell and two short pieces of straight hose.

[@uptopbb5723]

What size is the new t connector you got

[@uptopbb5723]

& also the part # for all the lines replaced I need to replace mine & im having a hard time finding all the exact parts I’m looking for I found some of the hoses but it’s not all I need in your video you replaced everything I plan to

[@jooper99]

Are those bleed screws on the metal tees?

[@TheBimmerBarn]

Yes! Weird right?

[@jooper99]

@@TheBimmerBarn Handy af though. Looks like it’s at highest point - Should eliminate the need to vacuum fill the cooling system.

[@davewallace9048]

The BMW clamps are called Oetiker clamps!!

[@Crownedbrothers]

Do these work better than the standard clamps with a screw?

[@runjee0074]

What size is the brass t?

[@TheBimmerBarn]

3/8 yes

[@skillz1855]

The bigger leaks are under the turbochargers.

[@maxthemaltesedog3597]

💯

[@hunterpinnell6254]

Hey if you happen to be monitoring this video, can you tel me the OD ID of the smaller coolant hoses? I have a 2011 Alpina B7 and I wanna redo the hoses but none of them have the sizes written on the hoses nor are the diameters listed on the parts of any websites. They just come as an expensive kit. I'd prefer to roll down to the local auto parts store or by some colored hoses on the interwebs

[@kieunguyen-yf5hc]

where do get a brass adaptor?

[@TheBimmerBarn]

Local hardware store

[@Truth_Seeker_79]

​@TheBimmerBarn what size is the brass adapter? Thx

[@tomkat2803]

Is this the n63tu or just the n63

[@TheBimmerBarn]

Same procedure for both motors I believe

[@honorablewiz7447]

Oil burning issue he meant 2qts every thousand miles

[@mbashir393]

Same here

[@honorablewiz7447]

@@mbashir393 they should be called. BM Double O... Burning Motor Oil Oil

[@robertpoindexter1910]

I need you to work on my car😊

[@pugs1377]

A quart every 2k is nothin. I believe bmw allows up to a quart ever 700miles before it's considered a bad burner. What's the up difference on the Allina vs normal n63?

[@TheBimmerBarn]

532hp instead of the factory 440hp on the 750i/550i. Quite nice power for this big of a car!

[@pugs1377]

@@TheBimmerBarn wow that is nice! Is that considered a tu or is it an early n63?

[@NordicAdvRider]

Wiki facts: The modifications include large 44 mm (2 in) Honeywell turbochargers, reinforced cylinder heads, NGK spark plugs, high strength MAHLE pistons and an Alpina specific ECU. The maximum boost pressure of the turbochargers is increased to 14.5 psi.

[@pugs1377]

@@NordicAdvRider thanks for the info. I knew Alpina did a lot of tricks to the cars.

[@mikimiki195]

No you definitely didn’t brake that breather hose over the time you can just look at it and they snap in two.

[@djbenzo]

BMW is charging me $3376 to replace the lines on my 750i xDrive. Extended warranty does not cover hoses and lines. FML!😡

[@Truth_Seeker_79]

Exactly something happening for me. Stupid extended warranty don't cover rubber hoses, BMW recommends changing out the Y -pipe below that's another $1500 onto of that price you listed 😮

[@skillz1855]

You need to go a bit deeper

[@campostimas]

15 thousand views and barely over 300 likes. Sorry dude

[@TheBimmerBarn]

Hopefully the video helped some people!

[@brianvelasquez3120]

Are all the lines 3/8? Aswell as the brass t’s?

[@TheBimmerBarn]

Yes, that's the size that worked best for me!