New Engine Noise (N55)

BBursey · 06-08-2015, 06:45 PM

Hi guys -

I noticed a new engine noise after doing a fair bit of driving in warm (30C) weather today. When I parked at home and turned off "Max A/C", I notice this extra noise and managed to hear two cycles of it before the engine idle lowered and the noise when away.

The noise starts at 00:06 and lasts 11 seconds, the again at 00:29 and last another 11 seconds.

Any ideas?

Cheers,
Bryan

BBursey · 06-10-2015, 07:48 AM

Hi again -

For clarity, the noise is most noticeable near the front, passenger (right) side of the engine. I'd appreciate any thoughts on what the noise might be and whether it's something I need to worry about. FYI, the car has just over 20,000km on it and is due for a low-mileage, annual oil change later this month.

Cheers,
Bryan

swagon · 06-10-2015, 08:22 AM

I've never heard that sound before. I'll pay more attention next time I drive it.

Esteban · 06-10-2015, 04:45 PM

Never heard that sound either.

sometorque · 06-10-2015, 05:16 PM

Haven't heard that sound myself, but given it's off and on nature, I'm curious as to if it's maybe related to the rad fan turning on and off? also, maybe a bad serpentine belt or pulley?

I'd let it run for a bit and try to trace the noise.

Solo_M_Tech · 06-11-2015, 12:26 PM

A/C clutch or compressor. Since it goes off and on, that would be my guess. Your A/C system may need oil. It's added through the low pressure side

BBursey · 06-12-2015, 08:06 AM

Quote:

Originally Posted by ApexResistance

A/C clutch or compressor. Since it goes off and on, that would be my guess. Your A/C system may need oil. It's added through the low pressure side

Thanks for the feedback - that's basically where my head was at after doing as much reading online as I could.

Do you have any other info, or could you point me in the right direction, on lubricating the A/C compressor / clutch (i.e. adding oil to the low pressure side)?

Cheers,
Bryan

06-08-2015, 06:45 PM	#1
BBursey Work hard, play harder 14 Rep 261 Posts Drives: 2011 135i Join Date: Dec 2010 Location: Calgary, AB iTrader: (0) Garage List 2011 135i [0.00]	New Engine Noise (N55) Hi guys - I noticed a new engine noise after doing a fair bit of driving in warm (30C) weather today. When I parked at home and turned off "Max A/C", I notice this extra noise and managed to hear two cycles of it before the engine idle lowered and the noise when away. The noise starts at 00:06 and lasts 11 seconds, the again at 00:29 and last another 11 seconds. Any ideas? Cheers, Bryan __________________ 2011 135i M Sport \| COBB V3 AP Stage 1+ \| ER FMIC and CP \| BMS OCC \| Dinan Stage 3 Suspension \| Dinan High Performance Bushing Kit \| M3 Wishbones \| Modified CDV \| Clutch Stop \| APEX EC-7 Wheels w/ Michelin PSS 235/40R18 265/35R18 Tires \| Maddad Street Series Exhaust \| BMW Performance Kidney Grills \| LCI Blacklines \| Armrest Delete \| Spoiler Delete \| 28% Tint
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06-10-2015, 07:48 AM	#2
BBursey Work hard, play harder 14 Rep 261 Posts Drives: 2011 135i Join Date: Dec 2010 Location: Calgary, AB iTrader: (0) Garage List 2011 135i [0.00]	Hi again - For clarity, the noise is most noticeable near the front, passenger (right) side of the engine. I'd appreciate any thoughts on what the noise might be and whether it's something I need to worry about. FYI, the car has just over 20,000km on it and is due for a low-mileage, annual oil change later this month. Cheers, Bryan __________________ 2011 135i M Sport \| COBB V3 AP Stage 1+ \| ER FMIC and CP \| BMS OCC \| Dinan Stage 3 Suspension \| Dinan High Performance Bushing Kit \| M3 Wishbones \| Modified CDV \| Clutch Stop \| APEX EC-7 Wheels w/ Michelin PSS 235/40R18 265/35R18 Tires \| Maddad Street Series Exhaust \| BMW Performance Kidney Grills \| LCI Blacklines \| Armrest Delete \| Spoiler Delete \| 28% Tint
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06-10-2015, 08:22 AM	#3
swagon Major General 13518 Rep 8,163 Posts Drives: F80 6MT Join Date: Jun 2013 Location: . iTrader: (0)	I've never heard that sound before. I'll pay more attention next time I drive it.
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06-10-2015, 04:45 PM	#4
Esteban Major General 43568 Rep 7,224 Posts Drives: a slow car fast Join Date: Jun 2014 Location: SoCal iTrader: (0)	Never heard that sound either. __________________
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06-10-2015, 05:16 PM	#5
sometorque Private First Class 63 Rep 157 Posts Drives: 2011 135i DCT Join Date: Apr 2015 Location: Boca Raton iTrader: (0)	Haven't heard that sound myself, but given it's off and on nature, I'm curious as to if it's maybe related to the rad fan turning on and off? also, maybe a bad serpentine belt or pulley? I'd let it run for a bit and try to trace the noise.
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06-11-2015, 12:26 PM	#6
Solo_M_Tech Brigadier General 1688 Rep 3,140 Posts Drives: 2014 M5 6MT Join Date: Nov 2013 Location: Massachusetts iTrader: (7) Garage List 2014 BMW M5 [0.00]	A/C clutch or compressor. Since it goes off and on, that would be my guess. Your A/C system may need oil. It's added through the low pressure side __________________ 2014 M5 6MT
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