|
|
SUPPORT ZPOST BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER, THANKS! |
Post Reply |
|
Thread Tools | Search this Thread |
06-09-2022, 01:18 PM | #1 |
New Member
9
Rep 12
Posts |
Help with Whine
Hi, I have a new to me E85 Z4 convertible (89k miles), and it has a bit of a whine from the engine under acceleration / load. Brought it to a well-reviewed local shop and they "couldn't hear it," which seems crazy -- it's not loud but it's definitely noticeable, even to my damaged 40-something ears.
While I know a general "there's a whine on acceleration" is way too vague to diagnose on the Internet, are there any common things I can look at? It's tough because it won't do it at idle or revving in neutral so I can't just stick my head under the hood. It's a 5-speed, does it in any gear. Increases in pitch a bit with engine RPMs but not much. The noise doesn't "bother" me per se, I just don't want to find out it's something serious after it's too late. Thanks! Last edited by TheBobmanNH; 06-09-2022 at 01:24 PM.. Reason: mileage |
06-09-2022, 02:25 PM | #2 | |
Colonel
2441
Rep 2,715
Posts
Drives: Built not Bought 04 Z4 VF. E70
Join Date: Feb 2013
Location: Kitchener Ontario Canada
|
Quote:
Obviously rotating when car is moving. Wheel bearings, rear diff, transmission gears etc are all potentials. Try and narrow down to a particular area. I have my engine and trans on solid mounts, so I get feedback through those that is a whine. Possibly your engine or trans mounts are going away.
__________________
W2A Intercooled Vortech V3Si, custom ducting, Alpha N, 60# Bosch,2.62 pulley, multi port WMI, Severn Tuning(pokeybritches), Tial, magnaflow,SS race muffler, 42 design,3.91LSD, H&R, Hotchkis,ST coils,Konis, Megan camber arms, AKG SS, Nylon mounts, Poly bushings, Carbon interior, CF Aero.APEX
|
|
Appreciate
0
|
06-10-2022, 08:29 AM | #3 |
Brigadier General
3866
Rep 3,004
Posts |
W(h)ine....
Help with w(h)ine....I suggest a good Cabernet Sauvignon or perhaps a dry Merlot
No vibration(s)? Have all fluid levels (engine/transmission/differential) been checked? Suggest using a stethoscope to listen for this noise by touching all surfaces under the hood: https://www.amazon.com/Powerbuilt-64...dDbGljaz10cnVl
__________________
Racerbruce
Last edited by racerbruce; 06-10-2022 at 10:07 AM.. |
Appreciate
0
|
06-10-2022, 12:58 PM | #4 | |
New Member
9
Rep 12
Posts |
Quote:
Thanks though |
|
Appreciate
0
|
06-10-2022, 06:04 PM | #5 | |
Brigadier General
3866
Rep 3,004
Posts |
Quote:
A thought - although you hear the noise when driving, have you listened via stethoscope to the alternator, water pump, power steering pump, etc, etc. Fluid levels? Last time fluids were changed? Is it pronounced enough that you could drive by and someone could listen from the sidewalk?
__________________
Racerbruce
|
|
Appreciate
0
|
07-26-2022, 08:58 PM | #6 |
New Member
9
Rep 19
Posts |
If the whine is on acceleration, it may be to a tear in the intake boot or vacuum lines. You didn't mention any codes popping - have you scanned the car yet? I just changed my intake boot after getting some codes showing the engine was running lean. Good luck!
|
Appreciate
0
|
07-28-2022, 05:05 PM | #7 |
Second Lieutenant
180
Rep 270
Posts
Drives: 2006 Z4 M Roadster
Join Date: Oct 2019
Location: VA
|
I recently replaced the idler pulley, a/c pulley and tensioner in mine. It would whine at a cold start and then go away after a few minutes. Turned out to be the bearings in the idler pulley.
Not exactly the same symptoms as you describe but more food for thought
__________________
2006 Z4 M Roadster - Silver Grey Metallic
2011 X3 xDrive28i - Deep Sea Blue Metallic 2012 X5 M - Monte Carlo Blue Metallic 2017 X1 xDrive28i - Alpine White |
Appreciate
0
|
Post Reply |
Bookmarks |
|
|