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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Sat, Mar-12-2016, 11:35:57 AM   #51
911Fiddler
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Default Re: Help diagnosing 2003 E46 M3 engine ticking noise?

Try checking the frequency of the tick, ie camshaft runs at half the crank speed so assuming the tick happens once per rev, measuring the frequency of the ticking can tell you if its crank (pistons/rods) or cams (tappets etc).
Tricky part is measuring. I would take video at idle inc sound, import to a video editor tool that shows the sound track peaks and count the number of peaks per second....then its quantified & clearer...
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Old Mon, Aug-27-2018, 02:46:11 PM   #52
whips333
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Default Re: Help diagnosing 2003 E46 M3 engine ticking noise?

Sub'd just to remember to read this thread later
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Old Mon, Oct-15-2018, 07:45:33 AM   #53
LaSource
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Default Re: Help diagnosing 2003 E46 M3 engine ticking noise?

I haver similar problem which cannot be solved for quite a long time. Have taken it to many places

Some say 'they all do that'...though it is too loud to be ignored
Everyone firstly suspects valve clearances - they've been adjusted now multiple times
Rockers/followers have all been replaced
Cam replaced with a good used one from an upgraded car
Exhaust manifolds checked for leaks
Still same noise.

Now going in to yet another specialist for valve check (again!) plus this one has isolated it to the rear exhaust bank and is looking to put a camera down from the top of the rear engine...

Sigh


Quote:
Originally Posted by 911Fiddler View Post
Try checking the frequency of the tick, ie camshaft runs at half the crank speed so assuming the tick happens once per rev, measuring the frequency of the ticking can tell you if its crank (pistons/rods) or cams (tappets etc).
Tricky part is measuring. I would take video at idle inc sound, import to a video editor tool that shows the sound track peaks and count the number of peaks per second....then its quantified & clearer...
That sounds smart. May give it a go.
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Old Thu, Oct-18-2018, 10:51:01 PM   #54
Zhemel
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Default Re: Help diagnosing 2003 E46 M3 engine ticking noise?

Have you guys checked your water pump? I had a horrible knocking/ ticking sound and I traced it back to my water pump
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Discussing Help diagnosing 2003 E46 M3 engine ticking noise? in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)