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7 Series - F01 / F02 (2009 - 2015)
The 5th generation F01/F02 BMW 7 Series flagship forum. The redesigned 7 series leads off the BMW Fxx chassis code, offering an 8 speed automatic transmission and all turbocharged engine options.

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  #1  
Old 12-29-2014, 06:40 AM
Bige137 Bige137 is offline
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Turbo coolant questions

I stopped at the dealer to get my oil checked and topped off.

I've had a little steam coming from the turbo coolant lines after I did some more aggresive driving after parking. Since I was stopping by the dealer anyway I asked him to take a look. He took me in the shop and said the two coolant lines needed to be replaced because they were leaking. The two lines are the ones going from the high pressure pump to the turbos. I asked if he could just replace the rubber hoses and he said no and that each hose comes complete with the metal tubing, t's, y', etc. he said both turbos had to be removed and that would end up costing me $2200.00! WTF?

Then he took his flashlight and shined under the turbo to the top of the engine and asked me if I could the dirty engine? I could but it was basically dust and nothing that looked remotely troublesome to me. He said I need to replace the turbos soon maybe because of it. I laughed. He said it may go next month or maybe another 3 years but if I wanted to go ahead and change them it would be an additional $3000.00 while he did the $2200.00 hoses.

So far that quart of oil added up to $5200.00. He said he would put me in a loaner and I shouldn't drive the vehicle. I told him to put the engine cover on it and pull it out for me. I was leaving with it.

When I got home I opened the hood and saw the steam. I touched the hoses and everyone of them was leaking at the clamps. I cut the 10 compression clamps off and replaced them for $9.00 and then after it cooled down notice the reservoir was about 1.5" over the MAX indicator. I removed some of the coolant to the max line.

Would too much coolant build up more pressure than normal to make those clamps leak? Sorry for the long story but I was floored when I just wanted to get my oil topped off.
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  #2  
Old 12-29-2014, 12:51 PM
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jgbackes jgbackes is offline
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Too much coolant will not cause a pressure increase.

jeff
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  #3  
Old 12-29-2014, 04:16 PM
mikey2u mikey2u is offline
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the turbo gets so hot that the hose leaks from the clamps. That was the dumbest thing bmw every did was put those hose above the turbos. Had to change my hose twice and wrap them with aluminum foil.

Last edited by mikey2u; 12-29-2014 at 04:39 PM. Reason: misspell
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  #4  
Old 12-29-2014, 05:41 PM
coole65i coole65i is offline
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Maybe some after market parts will become available where those rubber hoses can be replaced with steel braided ones. Wait, that's a great idea, maybe I should get cracking on that. :P
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  #5  
Old 12-29-2014, 07:56 PM
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SkyDan SkyDan is offline
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Quote:
Originally Posted by mikey2u View Post
the turbo gets so hot that the hose leaks from the clamps. That was the dumbest thing bmw every did was put those hose above the turbos. Had to change my hose twice and wrap them with aluminum foil.
I seriously like this idea
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  #6  
Old 12-29-2014, 08:04 PM
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wjhughes420384 wjhughes420384 is offline
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before you shut down the car after "spirited" driving make sure you cool down your turbos, by several miles of 40mph, that will do more to extend the life of your turbos than anything else
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  #7  
Old 01-06-2016, 06:35 AM
Azbmw2 Azbmw2 is offline
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Did you get this issue resolved? My 335i was just diagnosed with this. BMW wants $2800. Parts only cost $300. Anyone know if this is can be done as a DIY? Any DIY instructions on this out there? Thanks!!
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Old 01-06-2016, 08:12 AM
paprmkr paprmkr is online now
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Quote:
Originally Posted by SkyDan View Post
I seriously like this idea
all we need is the size and length of current hose and have them made SS braided. there is a place here locally called "the Hose Man" that does all kinds. wonder how much it would cost. but definitely great idea. i would buy.
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  #9  
Old 01-06-2016, 09:36 AM
Bige137 Bige137 is offline
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The problem is that the hose was leaking and the turbos had to come off to get to the bottom hoses. Also the hoses are crimped onto the steel lines which makes it a pain. I had mine replaced by BMW.
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  #10  
Old 01-06-2016, 12:00 PM
Fikus Fikus is offline
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Originally Posted by Azbmw2 View Post
Did you get this issue resolved? My 335i was just diagnosed with this. BMW wants $2800. Parts only cost $300. Anyone know if this is can be done as a DIY? Any DIY instructions on this out there? Thanks!!
look at my DIY turbo coolant lines

http://www.bimmerfest.com/forums/sho...d.php?t=888572
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  #11  
Old 01-06-2016, 12:18 PM
Azbmw2 Azbmw2 is offline
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Thank you Fikus! I'm trying to absorb as much as I can on how to do this myself and save $2k. Everything looks different on you DIY. I have a 2008 335i, and don't think they are similar location/component compared to yours. What model/year is your DIY on?
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  #12  
Old 01-06-2016, 12:23 PM
Fikus Fikus is offline
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Quote:
Originally Posted by Azbmw2 View Post
Thank you Fikus! I'm trying to absorb as much as I can on how to do this myself and save $2k. Everything looks different on you DIY. I have a 2008 335i, and don't think they are similar location/component compared to yours. What model/year is your DIY on?
2010 750.I was thought at the beginning its will be not easy, but started to do this.It was ok.I dont think its more complicated then 750.Just make pics through the project so you know how to assemble it back.
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  #13  
Old 01-07-2016, 11:54 AM
edfiero edfiero is online now
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Quote:
Originally Posted by Bige137 View Post
The problem is that the hose was leaking and the turbos had to come off to get to the bottom hoses. Also the hoses are crimped onto the steel lines which makes it a pain. I had mine replaced by BMW.
Guess I misunderstood your earlier post. I thought you were saying you cut the OEM clamps off and replaced them yourself for 9 bucks. Were you able to fix any portion of this leak yourself, or did you end up paying BMW the two Large ??
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