High pitched engine knocking? Help....

silver28 · 05-31-2012, 10:58 AM

Hey guys - so I have a 06 3.0SI roadster, only 13K miles. Bought it used, it was lady driven and drives well.

Started it up this morning, and heard some fairly loud knocking, and it wasn't consistent in rhythm. Imagine you cut a wood broomstick in half and started hitting them together, that's what it sounded like. It wasn't consisten, it would be "knock...knock knock....knoc.....knock knock knock....etc"

I can't hear it while driving but only heard it at idle Haven't driving my car in a week either.

Any idea? Just a bit worried...I just got it last Oct, and not an engine guy...not my expertise. Should I get it checked out by a garage or stealership?

inTgr8r · 05-31-2012, 11:23 AM

RMP motors would be a good place to have it checked.
http://www.rmpmotors.com/

NYZ4Jack · 06-07-2012, 08:43 AM

Maybe bad gas / bad octane? Are you sure it was coming from engine? I would also check the fan area - maybe something came lose and was getting hit by the fan/check fan blades for any cracks or uneven wear, etc.

3002 tii · 06-07-2012, 10:22 AM

valve lifters?

seank · 06-07-2012, 12:11 PM

Check your oil level. If it is slightly lower, it will make more noise from the lifters. Fill to top and check noise again.

EMP07 · 06-07-2012, 02:22 PM

Quote:

Originally Posted by Dubbedown

valve lifters?

What Dubbedown says. sounds like the sticking valve issue.

Do a quick search and you find it is common. I had the head replaced when I had an SI.

05-31-2012, 10:58 AM	#1
silver28 Private First Class 86 Rep 174 Posts Drives: 2014 F32 435i xdrive 6 speed Join Date: Nov 2011 Location: Toronto, Ontario, Canada iTrader: (0)	High pitched engine knocking? Help.... Hey guys - so I have a 06 3.0SI roadster, only 13K miles. Bought it used, it was lady driven and drives well. Started it up this morning, and heard some fairly loud knocking, and it wasn't consistent in rhythm. Imagine you cut a wood broomstick in half and started hitting them together, that's what it sounded like. It wasn't consisten, it would be "knock...knock knock....knoc.....knock knock knock....etc" I can't hear it while driving but only heard it at idle Haven't driving my car in a week either. Any idea? Just a bit worried...I just got it last Oct, and not an engine guy...not my expertise. Should I get it checked out by a garage or stealership?
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05-31-2012, 11:23 AM	#2
inTgr8r Lieutenant General 2432 Rep 11,667 Posts Drives: M2 Comp Join Date: Mar 2006 Location: Toronto iTrader: (10)	RMP motors would be a good place to have it checked. http://www.rmpmotors.com/ __________________ '21 M2C Hockenheim Silver '18 718 Cayman S Lava Orange (sold) '13 E92 M3 Santorini Blue (sold) '07 Z4 M Coupe Alpine White (sold)
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06-07-2012, 08:43 AM	#3
NYZ4Jack Private 18 Rep 94 Posts Drives: 2005 Z4 3.0i Join Date: Nov 2011 Location: New York, NY iTrader: (0)	Maybe bad gas / bad octane? Are you sure it was coming from engine? I would also check the fan area - maybe something came lose and was getting hit by the fan/check fan blades for any cracks or uneven wear, etc.
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06-07-2012, 10:22 AM	#4
3002 tii Lieutenant General 2288 Rep 12,565 Posts Drives: Z4 M, X5, GX460 Join Date: Apr 2008 Location: CT iTrader: (99) Garage List F15 X5 xDrive35i [8.75] E86 Z4 M [10.00] F10 550i (Retired) [9.17] F25 X3 xDrive35i (R ... [9.43] E82 135is (Retired) [9.50] E85 Z4 M (Retired) [9.41] E90 328i xDrive (Re ... [9.25] E86 Z4 3.0si (Retired) [9.24]	valve lifters? __________________ Follow for latest mods
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06-07-2012, 12:11 PM	#5
seank enthusiast 48 Rep 1,695 Posts Drives: e30 m3,e90 wagon,sprinter,z4m Join Date: Dec 2011 Location: sacramento, ca iTrader: (4)	Check your oil level. If it is slightly lower, it will make more noise from the lifters. Fill to top and check noise again.
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