Pulley/Belt noise?

balkanbemve · 03-08-2019, 09:56 AM

Ill try to get an up close shot of the pulleys. Happens every couple of days, cold engine, warm engine, driving, parked. Some days it never makes a noise. Quite embarassing though. Would just a belt kit solve the problem?

I do notice a very slight side to side movement on the left pulley.

Pladi · 03-08-2019, 12:27 PM

Get that fixed asap. Doesnt look right. Get a pulley and belt kit for 160 bucks. Or u are gonna get that sucked into the engine.

vespa · 03-08-2019, 08:32 PM

Maybe just the PCV valve. If you can get it to keep squealing after you open the oil cap then it's definitely not the PCV valve. Or, if you can confirm that the little hose barb on the top/center of the engine is continuously sucking in air at idle (squealing or not) by sticking a tissue to the tip or connecting a clear hose to draw in oil or water, then it definitely is the PCV. Note that the barb has a little loose-fitting cover that needs to be removed first.

TheMidnightNarwhal · 03-08-2019, 09:11 PM

Take off your belt and run the engine for like a minute. You will know for sure if it's belt drive related.

balkanbemve · 03-11-2019, 03:00 PM

Dealer confirmed it was the tensioner going bad, belt is fine. However, I will order the whole kit and do myself.

03-08-2019, 09:56 AM	#1
balkanbemve Second Lieutenant 20 Rep 225 Posts Drives: 2013 135i Join Date: Nov 2018 Location: SoCal iTrader: (0)	Pulley/Belt noise? Ill try to get an up close shot of the pulleys. Happens every couple of days, cold engine, warm engine, driving, parked. Some days it never makes a noise. Quite embarassing though. Would just a belt kit solve the problem? I do notice a very slight side to side movement on the left pulley. Last edited by balkanbemve; 03-08-2019 at 10:09 AM..
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03-08-2019, 12:27 PM	#2
Pladi Lieutenant Colonel 718 Rep 1,753 Posts Drives: 2011 335i xdrive Join Date: Nov 2017 Location: Waterloo, ON Canada iTrader: (0)	Get that fixed asap. Doesnt look right. Get a pulley and belt kit for 160 bucks. Or u are gonna get that sucked into the engine.
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03-08-2019, 08:32 PM	#3
vespa First Lieutenant 217 Rep 245 Posts Drives: 2011 335i Join Date: Dec 2014 Location: Thousand Oaks iTrader: (0)	Maybe just the PCV valve. If you can get it to keep squealing after you open the oil cap then it's definitely not the PCV valve. Or, if you can confirm that the little hose barb on the top/center of the engine is continuously sucking in air at idle (squealing or not) by sticking a tissue to the tip or connecting a clear hose to draw in oil or water, then it definitely is the PCV. Note that the barb has a little loose-fitting cover that needs to be removed first.
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03-08-2019, 09:11 PM	#4
TheMidnightNarwhal Major General 2657 Rep 6,289 Posts Drives: 11' 335is DCT Join Date: Jun 2015 Location: Gatineau, Quebec iTrader: (0)	Take off your belt and run the engine for like a minute. You will know for sure if it's belt drive related.
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03-11-2019, 03:00 PM	#5
balkanbemve Second Lieutenant 20 Rep 225 Posts Drives: 2013 135i Join Date: Nov 2018 Location: SoCal iTrader: (0)	Dealer confirmed it was the tensioner going bad, belt is fine. However, I will order the whole kit and do myself.
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