[Jims M3]

Originally Posted by 535_BiTurbo

There are M5 injector heat shrouds?

Not for the injectors, for the coolant lines. It was actually part of a service bulletin but they also work on the 550i. Where the coolant lines go into the hard lines they sit right above the turbo and rubber just doesn't last through those heat cycles.

[135i_vs_]

Originally Posted by Jims M3

Not for the injectors, for the coolant lines. It was actually part of a service bulletin but they also work on the 550i. Where the coolant lines go into the hard lines they sit right above the turbo and rubber just doesn't last through those heat cycles.

Looks like this is the SB. I am wondering why applied it only to M5, when clearly the N63 platform have the same issue!
I will do this RIGHT AWAY on the 550i.
Thanks,

[badblack550xi]

Originally Posted by 135i_vs_

Looks like this is the SB. I am wondering why applied it only to M5, when clearly the N63 platform have the same issue!
I will do this RIGHT AWAY on the 550i.
Thanks,

thx for the PDF

[EL Jeffe 5]

you will get this fixed and fall in love with the Beast
I have 2013 550 I had some issues with Drive train malfunction after replacing couple of coils and sparkplug car is running just fine.
Good luck

[535_BiTurbo]

Originally Posted by 135i_vs_

Looks like this is the SB. I am wondering why applied it only to M5, when clearly the N63 platform have the same issue!
I will do this RIGHT AWAY on the 550i.
Thanks,

awesome

[135i_vs_]

Originally Posted by Jims M3

Not for the injectors, for the coolant lines. It was actually part of a service bulletin but they also work on the 550i. Where the coolant lines go into the hard lines they sit right above the turbo and rubber just doesn't last through those heat cycles.

I was looking at the M5 coolant lines compared to the N63, they are very different. Were the M5 heat shrouds large enough to cover the N63 hose and clamps?

[Dcm1952]

Sorry to hear about your issues with the N63. I just traded my 2012 650i for a 2014 535i. I can now sleep peacefully at night.

Good Luck

[m5james]

Originally Posted by 135i_vs_

Looks like this is the SB. I am wondering why applied it only to M5, when clearly the N63 platform have the same issue!
I will do this RIGHT AWAY on the 550i.
Thanks,

Because that means they'd have to cover thousands of other cars as well. I called BMW NA about my failed injectors, they basically told me to kick rocks even though I pointed out they're the exact same injectors under recall on the N54. I replace them myself, about a month goes by and suddenly an SIB is released that they'll replace them...fortunately I had a buddy working at the dealership who swapped my old ones for new ones and I recouped my money selling the old ones.

Back more on topic, I have the same issue with the coolant hoses on my X5M as well.

[m5james]

Originally Posted by Dcm1952

Sorry to hear about your issues with the N63. I just traded my 2012 650i for a 2014 535i. I can now sleep peacefully at night.

Good Luck

Because the N55 doesn't have it's own set of issues Bulletproof BMW I6's stopped when they went from the M** to the N** engines.

[ezaircon4jc]

Originally Posted by m5james

Because the N55 doesn't have it's own set of issues Bulletproof BMW I6's stopped when they went from the M** to the N** engines.

Such as?? Both our N55's (2012 w/83K miles & 2014 w/33K miles) haven't had a single issue; other than the oil filter housing gasket.

[m5james]

Simple Google search netted me these results:

"BMW tech perspective here. The N55 is a better more reliable engine than the N54 was. Actually issues with the n55 are fairly few. On occasion I have had to do the HPFP, valvetronic motor, thermostat, and boost control solenoid. Cracked vacuum lines can cause low boost faults too. Oil leaks from the common areas include the oil filter housing and occasional oil pan gasket."

"Both engines are good IMO. The main difference is the exhaust. The new N55 engine has one exhaust pipe the feeds from all 6 cylinder (for less fuel consumption) while the N54 had 2 pipes, one feeding from cylinders 1, 2, and 3 and another pipe feeding from cylinders 4, 5, and 6."

I thought we'd gotten the GF a very reliable engine with the BMW I6 in her 08 535xiT, but after having to replace the engine myself last month after only 108k (failed injector flooded the engine and destroyed piston #1), more research showed me that the oil pump and/or piston failures are actually common (even found a YouTube video of someone disassembling their motor) and that the N55 isn't much different, proving this statement to be true:

"Overall the N54 is a more complicated design. It also has some higher end components such as the piezo injectors and true dual turbos. N55 is what most would consider a cost reduced version of the N54."

Point being it's still a BMW engine that's built with quantity over quality mindset, which seems to have been the other way around 15+yrs ago.

[Creynolds]

Originally Posted by Jims M3

I replaced the leaking rubber hoses on the turbo coolant lines with Silicone and then installed the M5 heat shrouds to further protect the lines from the heat of the turbo's. I also removed the engine cover vs. having the dealer install new rubber lines for 2k.

http://www.bimmerfest.com/forums/sho...=806101&page=2

I replaced he lines in Napa's parking lot in under an hour for under 20 bucks with t connector included (Wel 2 t total was like 12.50)