Flex joint, giubo, "donut" - Alfa Romeo Bulletin Board & Forums
 2Likes
  • 1 Post By Alfajay
  • 1 Post By spiderserie4
 
LinkBack Thread Tools Display Modes
post #1 of 10 (permalink) Old 06-03-2019, 04:10 AM Thread Starter
Registered User
 
Join Date: Apr 2004
Location: Clinton, CT
Posts: 86
Flex joint, giubo, "donut"

I noticed that Centerline Alfa has two different types, one of which is referred to as OEM. Is there any difference in functionability or longevity?

Alfacat
1985 Spider
alfacat is offline  
Sponsored Links
Advertisement
 
post #2 of 10 (permalink) Old 06-03-2019, 06:07 AM
Registered User
 
1978alfa's Avatar
 
Join Date: Oct 2006
Location: Central Florida
Posts: 1,026
Interesting.
OEM looks to have aluminum inserts and the other has pressed steel.
I'm not sure which has better thermal bonding characteristics with rubber.
I'd call them and inquire.

'67 Duetto, '74 GTV
Past '78 Alfetta w/ TwinSpark
1978alfa is offline  
post #3 of 10 (permalink) Old 06-03-2019, 06:46 AM
Moderator
Platinum SubscriberModerator
 
Alfajay's Avatar
 
Join Date: Jan 2005
Location: San Juan Capistrano
Posts: 9,731
If you want even more choices, look at the Spruell website (search on "donuts"). They offer stronger/harder giubos, such as their p/n 605-15851-HD. Some of these are designed for larger/heavier cars, such as Mercedes.
Alfaboutvegas likes this.

Jay Mackro
San Juan Capistrano, CA

'63 Guilia spider
'65 Guilia Sprint GT
'67 Duetto
'91 164L
Alfajay is offline  
Sponsored Links
Advertisement
 
post #4 of 10 (permalink) Old 06-03-2019, 07:09 AM
Senior Member
Gold Subscriber
 
sloboy89's Avatar
 
Join Date: Feb 2011
Location: Dallas, Texas
Posts: 1,665
Garage
The cheaper option appears to be a Fiat giubo with the "ears" cut off. I got one of these from Centerline, and my Alfa specialist was not impressed. He recommended replacing with the OEM product.

Rich

'85 Spider Veloce
'17 Giulia Ti Sport
sloboy89 is offline  
post #5 of 10 (permalink) Old 06-03-2019, 07:11 AM
Registered User
 
spiderserie4's Avatar
 
Join Date: Jul 2011
Location: Cologne, Germany
Posts: 7,047
Centerline they state OEM Pirelli brand...if that is the case, that would be the one I'd go for, ok its 17 bucks more, but not a part to skimp on really.

plus, when you come across NOS joints still in AR bags, they have the round holes, not those egg shaped thingys
Gordon Raymond likes this.

Dom - Alfa Spider 1990 S4 - formerly: Alfa 101 Sprint, 2600 Sprint, Montreal - family classics: Jensen Interceptor II, '58 Hooper RR Silver Cloud I, Shadow II, '60 Corvette.
spiderserie4 is online now  
post #6 of 10 (permalink) Old 06-03-2019, 08:57 AM
Moderator
Platinum SubscriberSuper Moderator
 
Gordon Raymond's Avatar
 
Join Date: Jul 2006
Location: Northfield, Illinois
Posts: 11,040
I agree with the post above. Being a belt-and-suspenders builder, I use the 600 Hp MB version from Spruell, with the full, hardened GTA cage on the CR transmission behind my GTA engine. I do not EVER-EVER-EVER want to have the flex joint come apart without time for a shut down.
Attached Images
 


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Gordon Raymond
Illinois SNO Alfa Chapter Director
Illinois SNO Ferrari Chapter Director
and sometimes, CONFUSED AND INCORRECT, but Larry helps me out.
Now:
Illinois Chapter Director AND Charter Member of THE CONFUSED AND INCORRECT

Last edited by Gordon Raymond; 06-03-2019 at 08:58 AM. Reason: typo
Gordon Raymond is offline  
post #7 of 10 (permalink) Old 06-03-2019, 09:45 AM
Senior Member
Platinum Subscriber
 
alfaparticle's Avatar
 
Join Date: Oct 2004
Location: Columbia SC
Posts: 12,652
The Spruel part is a good option if you expect to be removing it in the future as it does not have to be compressed. My motor makes a lot more HP than stock and it has held up well. There is a thread about installing it which highlights an error in the installation instructions.

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 offline  
post #8 of 10 (permalink) Old 07-05-2019, 03:15 AM
Registered User
 
Join Date: Jul 2004
Location: Montreal (the city, not the car)
Posts: 1,177
I'm digging into 105 Giubos as some club members around here have been faced with driveline vibrations. We are down to swapping parts from cars to cars to isolate the source. We have dealt with three different driveshaft specialists to balance parts, and recently two of them have pointed at the donut as being the joker in the game. They cannot mount giubos on their machines.

One of the cars involved started vibrating after the gearbox was rebuilt, and a new repro donut was installed. My own car has a similar vibration after years of replacing/swapping/balancing everything - and a repro donut from Centerline. Hmmmm.

I still have the original Pirelli donut from my car, and will reinstall it just to see what it changes.

I looked at Spruell's site, and they do not sell the German donut anymore. As a matter of fact Paul seems to be winding his business down.

Just for fun, I tried to track down the Mercedes donut that sort of fits. Rockauto has a wonderful catalog, and in some cases it gives dimensions. This seems to be dead on. (MB 2114100415). However, given the troubles some of you have experienced installing it, I don't think it would help.

Any thoughts appreciated.

Yves Boulanger
1974 2000GTV
yvesmontreal is offline  
post #9 of 10 (permalink) Old 07-05-2019, 03:53 AM
Registered User
 
spiderserie4's Avatar
 
Join Date: Jul 2011
Location: Cologne, Germany
Posts: 7,047
so what is the thing with the ears?
do they lock into something?
(not had to remove a giubo yet on my spider)

the first one (a seller I like, Old Model Parts, in Greece) has ears
the second one, here called 'rinforzato'/heavy duty (Spitline in Italy) no ears

both give same PN
Attached Images
  

Dom - Alfa Spider 1990 S4 - formerly: Alfa 101 Sprint, 2600 Sprint, Montreal - family classics: Jensen Interceptor II, '58 Hooper RR Silver Cloud I, Shadow II, '60 Corvette.
spiderserie4 is online now  
post #10 of 10 (permalink) Old 07-05-2019, 06:46 AM
Registered User
 
quadrifolio's Avatar
 
Join Date: Jun 2008
Location: South-Spain
Posts: 836
I will state from your pics that the one with the ears is from a transaxle car (116 model) and the one without the ears is for 105/115 model cars
quadrifolio 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