Whats that sound <<NOW WITH VIDEO!>>

bigwinn

bigwinn

Elite
 Lincoln UK
Site Supporter
Now I don't want to be one of those guys who says 'I've got a weird noise what is it'... but

Just any pointers please to help me dig further- 2004 2.2 M54 100K

I have a very slight whistle (ish) noise from the engine. Happens briefly around 1200-1500rpm accelerating, when still or moving, in gear or out, mainly when hot not cold. I did notice it was less with aircon off but then made no difference.

What I've done:
- air filter changed and checked when I did service 2 weeks back
- all hose clips tightened
- DISA valve checked all ok

I'm thinking maybe a belt issue at the front of the engine?

Where would you guys look first?

Cheers

Stuart
 
I'd bet that it's the small convoluted pipe that branches off the rubber intake boot. The rubber perishes and causes a whistle at low revs/light throttle. Follow the pipe from air filter box to throttle body and you will see the convoluted branch.images.jpeg
Have a good look at it and it will probably be split like in the above photo :thumbsup:
 
patriot66 said:
I'd bet that it's the small convoluted pipe that branches off the rubber intake boot. The rubber perishes and causes a whistle at low revs/light throttle. Follow the pipe from air filter box to throttle body and you will see the convoluted branch.images.jpeg
Have a good look at it and it will probably be split like in the above photo :thumbsup:
Click to expand...
After owing 3 cars with the m54 engine i have had to replace this part on all of them.
Seems like a good shout to check this out for anyone with an m54 lump :thumbsup:
 
Did some investigating- no obvious splits on the boot but deffo starting to perish/crack

Refitted and immediately no sound, but will see if it does the same hot

Will see if that has fixed it (tightening it all up etc) and go from there

Cheers for the input!
 
Afternoon all

So the sound still lives on

Deffo when hot not cold
Deffo low revs under strain/load

Where next would you recommend?
 
Now with added video... slight blip of the throttle 2 times

https://youtu.be/cISq5dfc320
 
I had this noise on my first Zed and never got to the bottom of it. Only engine mod I did was change the air filter to a k&n one.

Second Zed had the same noise but only after changing the air filter again. Tried re-fitting and tightening etc but the noise remained.

Might not be this on yours but after I reverted back to stock, the noise went.

Might be worth re-checking fittings after the air filter change.
 
I changed the same hose with the flexi appendage when I fitted a ramair filter and refurbed my disa valve. I love the induction noise and i believe it has a little more get up and go, although it may just be the sound. The fuel consumption seems a bit better,😳 but I have a slight whistle at 2000 revs. I’ve removed and retightened everything and it’s still there. Over the course of the weekend I’m going to put the standard air box back on and try that. I’ll post the result.
 
Sorry, to resurrect an old thread [ref]bigwinn[/ref], but did you ever get to the bottom of this whistle?
 
I never solved it on the 2.2 engine

The current 3.0 does it too

Lots been spoken about the z4 whistle

After making sure my intake boot was good I accepted that it wasn’t a failure approaching

I did read that it could be oil flow though the filter but I never concluded

Your doing it?
 
Yep, mine is doing it and I just changed the intake boot (the common failing one) today and it is still doing it. I doubled checked the entire intake system to make sure all hoses were home and well clamped.

I have also read about possible causes being oil filter, CCV, belts, DISA, VANOS. Not a short list of troubleshooting there!!

I was planning to do the DISA and VANOS "upgrades" soon anyway, so fingers crossed.
 
TheDan said:
Yep, mine is doing it and I just changed the intake boot (the common failing one) today and it is still doing it. I doubled checked the entire intake system to make sure all hoses were home and well clamped.

I have also read about possible causes being oil filter, CCV, belts, DISA, VANOS. Not a short list of troubleshooting there!!

I was planning to do the DISA and VANOS "upgrades" soon anyway, so fingers crossed.
Click to expand...

I did all of that and it still did it!!

Deffo worth googling the oil filter one but I only used high end filters
 
bigwinn said:
Deffo worth googling the oil filter one but I only used high end filters
Click to expand...

Yeah I changed mine about 6 months ago and went for the recommended Mann filter. Pretty good brand I thought? Haven't changed the filter housing gaskets, so might have something to do with that?

Its becoming such a mystery!!
 
You must log in or register to reply here.
Back
Top Bottom