Cold Start on 550xi

Hilly · 02-17-2018, 12:33 PM

Wanted to know if anyone else experienced this. Some mornings when I start the car up it will make some sort of screeching sound. Car is a 2011 bmw 550xi. Car drives fine and no codes, but this happens on occasion

AZ_Bmw_550 · 02-17-2018, 03:45 PM

Mine does that like one out of every 12 or 15 starts. It's never changed in frequency so I've never bothered to have it checked. I always assumed it's just the starter gear getting hung up for a second after start.

ezaircon4jc · 02-17-2018, 04:18 PM

Just a wag but a slipping belt will cause a screech.

BuiltnBoostedZ · 02-17-2018, 07:58 PM

old/stretched belt. wet belt. Tensioner on its way out. All depend on how many miles. Not hard to fix or adjust.

AZ_Bmw_550 · 02-18-2018, 12:41 PM

In my case, it's not a belt or idler, it's a different sound than that.

535_BiTurbo · 02-18-2018, 09:18 PM

How difficult is it to replace the belt or tensioner?

TKR · 03-02-2018, 11:12 AM

My 2011 X5 E70 with same engine did that random screech on startup, and then one morning the starter was dead.

That sound disappeared after starter motor was replaced.

Be warned, the starter is difficult to access... and dealer wanted $1k for labor + $600 for part. I replaced myself with ISTA instructions and it was a real PITA. My total cost $150 with remanufactured oe starter.

535_BiTurbo · 03-02-2018, 10:26 PM

Maybe its difficult on the X5. But how difficult is it on the F10?

02-17-2018, 12:33 PM	#1
Hilly Private First Class 20 Rep 167 Posts Drives: 2011 550xi m-sport Join Date: Mar 2013 Location: Broken Arrow,OK iTrader: (0)	Cold Start on 550xi Wanted to know if anyone else experienced this. Some mornings when I start the car up it will make some sort of screeching sound. Car is a 2011 bmw 550xi. Car drives fine and no codes, but this happens on occasion
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02-17-2018, 03:45 PM	#2
AZ_Bmw_550 Private First Class 52 Rep 183 Posts Drives: 2015 BMW 650i GC Join Date: Feb 2015 Location: United States iTrader: (0) Garage List 2011 BMW 550i [0.00]	Mine does that like one out of every 12 or 15 starts. It's never changed in frequency so I've never bothered to have it checked. I always assumed it's just the starter gear getting hung up for a second after start.
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02-17-2018, 04:18 PM	#3
ezaircon4jc Major General 4451 Rep 5,337 Posts Drives: 2019 540i M Sport Join Date: Jan 2015 Location: San Diego iTrader: (0)	Just a wag but a slipping belt will cause a screech.
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02-17-2018, 07:58 PM	#4
BuiltnBoostedZ Private First Class 145 Rep 122 Posts Drives: 2012 535ix Join Date: Oct 2017 Location: I'm here bc I'm not all there iTrader: (0)	old/stretched belt. wet belt. Tensioner on its way out. All depend on how many miles. Not hard to fix or adjust. __________________ 2012 F10 535ix - JB4 - BM3 - Meisterschaft GTC - coded modules - CF front lip - CF rear diffuser - clear bra
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02-18-2018, 12:41 PM	#5
AZ_Bmw_550 Private First Class 52 Rep 183 Posts Drives: 2015 BMW 650i GC Join Date: Feb 2015 Location: United States iTrader: (0) Garage List 2011 BMW 550i [0.00]	In my case, it's not a belt or idler, it's a different sound than that.
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02-18-2018, 09:18 PM	#6
535_BiTurbo Captain 107 Rep 659 Posts Drives: 2012 550I - BMS Stg 1 & CAI Join Date: Sep 2013 Location: Texas iTrader: (0)	How difficult is it to replace the belt or tensioner?
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03-02-2018, 11:12 AM	#7
TKR Private First Class 26 Rep 119 Posts Drives: 2016 X5 40e & 2018 330e Join Date: Aug 2015 Location: South Florida iTrader: (0)	My 2011 X5 E70 with same engine did that random screech on startup, and then one morning the starter was dead. That sound disappeared after starter motor was replaced. Be warned, the starter is difficult to access... and dealer wanted $1k for labor + $600 for part. I replaced myself with ISTA instructions and it was a real PITA. My total cost $150 with remanufactured oe starter.
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03-02-2018, 10:26 PM	#8
535_BiTurbo Captain 107 Rep 659 Posts Drives: 2012 550I - BMS Stg 1 & CAI Join Date: Sep 2013 Location: Texas iTrader: (0)	Maybe its difficult on the X5. But how difficult is it on the F10?
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