Knock Knock Bros

3rdCoastBMW · 11-16-2017, 03:26 PM

Any idea what this sound could be? I have looked up several posts, but haven't really found one to match the sound. It just started when I got to work this morning. Oil changed 1200 miles ago, but I do have a slight OFHG leak.

Jeff@TopGearSolutions · 11-16-2017, 07:47 PM

Not sure what it is but it doesn't sound good. When you revved, did the knocking sound follow with the RPM?

MysticRob · 11-16-2017, 07:55 PM

That sounds like it's time to drain the oil and see if your engine is dying.

BeastMode335i · 11-17-2017, 10:36 AM

Definitely sounds like a part out..

3rdCoastBMW · 11-17-2017, 11:50 AM

Yeah, I did another video that i posted on a FB group where as I slowly ramp throttle you can hear the noise increase with RPM. I am getting a rubber strap clamp to remove my oil filter and I will have an update by Saturday. I am going to miss this car

feuer · 11-17-2017, 12:39 PM

Spun rod bearings usually happen shortly after oil change. quiet/er when cold and louder when hot. Cyl 1 & 2 go out first. Send oil sample to lab.

Chris@VargasTurboTech · 11-17-2017, 05:47 PM

Sounds bad. Time to open or at least do an oil analysis.

Chris

11-16-2017, 03:26 PM	#1
3rdCoastBMW New Member 18 Rep 27 Posts Drives: 2014 F06 M6 Join Date: Jun 2017 Location: Houston iTrader: (0)	Knock Knock Bros - Help Any idea what this sound could be? I have looked up several posts, but haven't really found one to match the sound. It just started when I got to work this morning. Oil changed 1200 miles ago, but I do have a slight OFHG leak.
	Appreciate 0 Tweet Quote

11-16-2017, 07:47 PM	#2
Jeff@TopGearSolutions 3441 Rep 79,212 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (37)	Not sure what it is but it doesn't sound good. When you revved, did the knocking sound follow with the RPM?
	Appreciate 0 Quote

11-16-2017, 07:55 PM	#3
MysticRob Captain 573 Rep 870 Posts Drives: 2009 335i E90 Join Date: Jan 2017 Location: Fremont, CA iTrader: (0) Garage List 2009 BMW 335i E90 S ... [10.00]	That sounds like it's time to drain the oil and see if your engine is dying. __________________ 2008 E61 535xi Sport Wagon / 100k Miles / Deep Sea Blue Metallic / Natural Brown Interior / MHD Stage 1 91 CA-Octane Tune. SOLD - 2009 E90 335i M-Sport Sedan / 143k Miles / Alpine White Exterior / Chestnut Brown Interior / Mishimoto FMIC / xHP Stage 2.
	Appreciate 1 feuer4275.50 Quote

11-17-2017, 10:36 AM	#4
BeastMode335i Maximus Decimus Meridius 1129 Rep 4,584 Posts Drives: F30 335i Join Date: Apr 2014 Location: Down South iTrader: (2)	Definitely sounds like a part out.. __________________ F30 335i Melbourne Red Metallic M-Sport Package
	Appreciate 0 Quote

11-17-2017, 11:50 AM	#5
3rdCoastBMW New Member 18 Rep 27 Posts Drives: 2014 F06 M6 Join Date: Jun 2017 Location: Houston iTrader: (0)	Yeah, I did another video that i posted on a FB group where as I slowly ramp throttle you can hear the noise increase with RPM. I am getting a rubber strap clamp to remove my oil filter and I will have an update by Saturday. I am going to miss this car
	Appreciate 0 Quote

11-17-2017, 12:39 PM	#6
feuer Major General 4276 Rep 9,206 Posts Drives: wife crazy! Join Date: Apr 2015 Location: Chicago, IL iTrader: (5)	Spun rod bearings usually happen shortly after oil change. quiet/er when cold and louder when hot. Cyl 1 & 2 go out first. Send oil sample to lab.
	Appreciate 0 Quote

11-17-2017, 05:47 PM	#7
Chris@VargasTurboTech Lieutenant Colonel 1932 Rep 1,532 Posts Drives: All Things TurboCharged Join Date: May 2016 Location: Bay Area iTrader: (0)	Sounds bad. Time to open or at least do an oil analysis. Chris
	Appreciate 0 Quote