Milano is making a howling noise - help? - Alfa Romeo Bulletin Board & Forums
 1Likes
  • 1 Post By PSk
 
LinkBack Thread Tools Display Modes
post #1 of 13 (permalink) Old 09-18-2017, 01:36 PM Thread Starter
Registered User
 
DietSeth's Avatar
 
Join Date: Nov 2016
Location: Ithaca, NY
Posts: 21
Garage
Milano is making a howling noise - help?

Hey Gang,

I just recently got my Milano project on the road and as I'm driving, it's making a loud howling noise. The noise is almost non-existent at idle but grows as the engine revs increase. The noise also seems to be worse when under heavier load. It seems to be coming from directly underneath the car, maybe slightly towards the front. I'm thinking either driveshaft seal or one of the rubber donuts, but want to verify before throwing (more) money at it.

I just took this terrible video to capture the sound:

Is this the sound of a driveshaft that needs to be rebuilt?


Thanks,
Diet
DietSeth is offline  
Sponsored Links
Advertisement
 
post #2 of 13 (permalink) Old 09-18-2017, 02:09 PM
Senior Member
Platinum Subscriber
 
alfaparticle's Avatar
 
Join Date: Oct 2004
Location: Columbia SC
Posts: 12,556
Does the noise change with engine rpm or road speed?

Ed Prytherch
79 Spider
85 GTV6 3L
76 Suzuki GT500
2011 Jaguar XKR

A little government and a little luck are necessary in life, but only a fool trusts either of them. - P.J. O'Rourke
alfaparticle is online now  
post #3 of 13 (permalink) Old 09-18-2017, 02:11 PM Thread Starter
Registered User
 
DietSeth's Avatar
 
Join Date: Nov 2016
Location: Ithaca, NY
Posts: 21
Garage
Quote:
Originally Posted by alfaparticle View Post
Does the noise change with engine rpm or road speed?
The noise changes with engine RPM. I can depress the clutch and rev the engine and will be able to hear the noise. Though it is louder under load than when the clutch is engaged.
DietSeth is offline  
Sponsored Links
Advertisement
 
post #4 of 13 (permalink) Old 09-18-2017, 07:06 PM
Registered User
 
Join Date: Jan 2003
Location: Manchester, CT
Posts: 443
Garage
Send a message via AIM to DOM!
Might be the center drive shaft support bearing.. It is hard to tell from the sound in the video.


Sent from my iPhone using Tapatalk

DOM! 1987 Milano Verde 1983 GTV6
2017 VW GTI SE 2003 Ducati 999 1992 BMW K1100RS
DOM! is offline  
post #5 of 13 (permalink) Old 09-18-2017, 11:21 PM
PSk
Registered User
 
Join Date: May 2003
Location: Tauranga New Zealand
Posts: 11,301
Send a message via AIM to PSk Send a message via Yahoo to PSk
Kick your mother-inlaw out of the car

Pete
alfaloco likes this.

'71 1750 Series 2 GTV:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
156 Series 1 v6 ... and remember it's all just opinions
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
PSk is offline  
post #6 of 13 (permalink) Old 09-19-2017, 08:46 AM Thread Starter
Registered User
 
DietSeth's Avatar
 
Join Date: Nov 2016
Location: Ithaca, NY
Posts: 21
Garage
Quote:
Originally Posted by DOM! View Post
Might be the center drive shaft support bearing.. It is hard to tell from the sound in the video.
Thanks. That's what I was wondering. I'll get the car over a pit this weekend and find the bearing - is there a test that can be performed to verify that the bearing is indeed bad?
DietSeth is offline  
post #7 of 13 (permalink) Old 09-19-2017, 09:27 AM
Registered User
 
Antonio105's Avatar
 
Join Date: Jul 2015
Location: Boston
Posts: 221
Garage
might be an alpha car

1972 Gt Veloce 2000
Antonio105 is offline  
post #8 of 13 (permalink) Old 09-20-2017, 10:33 AM
Registered User
 
racingswim2006's Avatar
 
Join Date: Apr 2006
Location: SE Michigan
Posts: 4,221
Pull your alternator, power steering, and A/C belt off and see if the noise continues.

If it is ENGINE speed related first eliminate the possibility of engine accessories. Then move to the driveshaft. A stethoscope may prove helpful if it's is able to be replicated without driving the car on the road.

If it is coming from the center of the car you can use a stethoscope with a friend to poke around on the floor and see where the noise comes from.

Rob
Alfas first, then everything else.
racingswim2006 is offline  
post #9 of 13 (permalink) Old 09-20-2017, 11:18 AM
Registered User
 
Join Date: Jan 2003
Location: Manchester, CT
Posts: 443
Garage
Send a message via AIM to DOM!
I did once have a water pump howl like mad on the GTV6..


Sent from my iPhone using Tapatalk

DOM! 1987 Milano Verde 1983 GTV6
2017 VW GTI SE 2003 Ducati 999 1992 BMW K1100RS
DOM! is offline  
post #10 of 13 (permalink) Old 09-20-2017, 11:24 AM Thread Starter
Registered User
 
DietSeth's Avatar
 
Join Date: Nov 2016
Location: Ithaca, NY
Posts: 21
Garage
Quote:
Originally Posted by racingswim2006 View Post
Pull your alternator, power steering, and A/C belt off and see if the noise continues.

If it is ENGINE speed related first eliminate the possibility of engine accessories. Then move to the driveshaft. A stethoscope may prove helpful if it's is able to be replicated without driving the car on the road.

If it is coming from the center of the car you can use a stethoscope with a friend to poke around on the floor and see where the noise comes from.

Thanks for the suggestions. It has no A/C or power steering but I will try disconnecting the alternator and re-testing. I'll also give the stethoscope method a shot. I hadn't thought of that idea at all.

Thanks,
Seth
DietSeth is offline  
post #11 of 13 (permalink) Old 09-20-2017, 12:05 PM
Registered User
 
Join Date: Jan 2003
Location: Manchester, CT
Posts: 443
Garage
Send a message via AIM to DOM!
Standing outside of the car is it louder in the front or near the center?


Sent from my iPhone using Tapatalk

DOM! 1987 Milano Verde 1983 GTV6
2017 VW GTI SE 2003 Ducati 999 1992 BMW K1100RS
DOM! is offline  
post #12 of 13 (permalink) Old 09-21-2017, 04:57 AM
Registered User
 
kredden's Avatar
 
Join Date: Jul 2003
Location: North Bend, WA
Posts: 3,315
Before disconnecting the alternator you could use the stethoscope on it to see if the bearing is noisy.

Kevin
kredden is offline  
post #13 of 13 (permalink) Old 09-22-2017, 08:14 AM
Registered User
Platinum Subscriber
 
multicam's Avatar
 
Join Date: Nov 2005
Location: CT
Posts: 1,000
Garage
Sounds louder when not under load. Any change with sl turning of the wheel to left or right.
Regardless sounds like a bearing noise and I would get a T scope and check drive shaft bearings and wheel bearings if noise changes with steering changes.

1994 164 LS 5 Speed
1988 Milano Verde 5 Speed
1960 Giulietta Spider
1959 Giulietta Sprint

1965 Giulia Spider [parts car now]
multicam is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Alfa Romeo Bulletin Board & Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 
For the best viewing experience please update your browser to Google Chrome