I noticed an odd noise coming from the engine bay the other day, ended up recording a quick video:
https://youtu.be/y4Cf5jevlQM
It appears to only happen on low RPMs, hitting anything above 2500 makes the odd rattle go away. Considering it's so loud and there have been no dash lights come on, I ran an OBD reader that worked to no avail as nothing came up. Has anyone heard something similar in their Z4 or know what it might be? Will be taking it into a shop once I can find one here on my college campus.
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Odd rattle in engine bay from low RPMs
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Odd rattle in engine bay from low RPMs
'03 2.5i SMG @ 110k mi
- Smartbear
- Lifer
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Odd rattle in engine bay from low RPMs
I wouldn’t be driving that until i found out what it was, could be a loose camchain etc.
Rob
Rob
e89 Sdrive 20i, plenty of mumbo & good economy-the thinking bears z4
e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si sold
- dhobbs
- Senior Member
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Odd rattle in engine bay from low RPMs
Strut braces can come loose, good idea to check all bolts are tightened up.
Are the heat shield attached OK.
I had an issue with the exhaust bolts rusting through and the bracket rattling.
Are the heat shield attached OK.
I had an issue with the exhaust bolts rusting through and the bracket rattling.
3.0si roadster. Requisite stubby. Sound gen mod. LED numberplate lights. LED boot strip. Interior lights LED too. ZHP gearknob. Daily drive
Motor in boot. Bilstein B8 dampers. New radio, much better sounds
Motor in boot. Bilstein B8 dampers. New radio, much better sounds
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Odd rattle in engine bay from low RPMs
Sounds like the disa.
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Odd rattle in engine bay from low RPMs
Yup, checked the DISA valve and that was the issue! Replacement is on the way.
'03 2.5i SMG @ 110k mi
- colb
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Odd rattle in engine bay from low RPMs
So it was the infamous Clacking Disa Valve, a sure sign its failed. Using a Mechanics stethascope to pinpoint the noise or a screwdriver with the handle placed against the ear and the blade touching the suspect areas of the engine would hgave been an aid to diagnosing the problem. When they do fail they certainly make what is described as a clacking noise, its the valve flap dancing about inside that produces the clacking.
Z Shed Cymru member
1999 1.8 Z3
2003 2.5 Z4
1998 Honda Deauville 650
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1999 1.8 Z3
2003 2.5 Z4
1998 Honda Deauville 650
If the forum helped you, why not help the forum back. Thats the Z4 way!
https://www.paypal.com/cgi-bin/webscr?c ... source=url