Classic Audi Ľ Technical Ľ Mech/Tech Ľ Transmission » B2 90Q rear gearbox seal

Reply
 
Thread Tools Display Modes
Old 23-06-21, 02:56 PM   #11
David42U856
Newbie!
Classic Audi Club Member
 
Join Date: Aug 2015
Posts: 17
Default

Quote:
Originally Posted by Groundhog View Post
Cap head bolts are usually harder than standard bolts so make sure you have a keen drill and bit. If you have one a number 8 multi splined sockets ( used on drive shaft bolts) it can be hammered into the cap head....has always worked for me 99% of the time.
Unfortunately, the multi-splined sockets didn't work. I tried three or four times with the 8mm version but was unsuccessful. The next size I have is 10mm, so a big step up - I guess I should try it though. I'll soak it with release oil for a while. I got the loosened screw out and have ordered new ones. I think I'll try installing two new screws with loctite and see if that solves the issue. I've got a bad feeling about drilling the top off the damaged screw as I'll end up with a dowel holding the damper/counter weight in place and a flange that stops me removing it. If that happens I'm screwed.
Incidentally, the screw I removed has a vertical crack in the side of the cap head. Not a failure mode I've seen before. Have you ever seen a cracked bearing support housing as a result of loose/missing screws? If the screw can crack I guess the bearing housing can too.
David42U856 is offline   Reply With Quote
Old 23-06-21, 03:03 PM   #12
David42U856
Newbie!
Classic Audi Club Member
 
Join Date: Aug 2015
Posts: 17
Default

Image of cracked screw (90Q rear output shaft bearing housing)
Attached Images
File Type: jpeg image0 (9).jpeg (54.0 KB, 20 views)
David42U856 is offline   Reply With Quote
Old 23-06-21, 04:06 PM   #13
mikes2
4 ring whore!
Classic Audi Club Member
 
Join Date: Nov 2007
Location: Polmont
Posts: 2,467
Default

I take it there's no room for a grip socket in the space available ?

These have saved my bacon a few times on rounded cap bolts
__________________
1991 90 quattro 20v sport
1988 90 quattro 2.6 TSR
1991 90 quattro
mikes2 is offline   Reply With Quote
Old 24-06-21, 07:59 AM   #14
Groundhog
Grown up member
 
Join Date: Nov 2009
Posts: 138
Default

Sorry to hear it wasnít successful. It would seem someone has been there before you and failed. The split bolt, I suspect, is as a result of a previous removal, Iím guessing someone hammered something to big in there, it had the desired effect in that I would imagine they removed it but then failed on the last bolt which is why the splined socket trick wonít work. I would do as you said replace the two and keep your fingers crossed.
I have never known a housing to split.
Groundhog is offline   Reply With Quote
Old 24-06-21, 08:08 AM   #15
tractor Dave
Grown up member
Classic Audi Club Member
 
Join Date: Apr 2018
Location: Wales
Posts: 859
Default

Have you got a mig welder?
Weld a small bolt in there.
Don't forget to remove you ecu's first.
tractor Dave is offline   Reply With Quote
Old 24-06-21, 02:35 PM   #16
David42U856
Newbie!
Classic Audi Club Member
 
Join Date: Aug 2015
Posts: 17
Default

Quote:
Originally Posted by mikes2 View Post
I take it there's no room for a grip socket in the space available ?

These have saved my bacon a few times on rounded cap bolts
Unfortunately, it's about 10mm down inside a counter-bore - so pretty inaccessible. Thanks for the suggestion though. I've never used a grip socket - sounds like it worth having in the tool kit.
David42U856 is offline   Reply With Quote
Old 24-06-21, 02:38 PM   #17
David42U856
Newbie!
Classic Audi Club Member
 
Join Date: Aug 2015
Posts: 17
Default

Quote:
Originally Posted by tractor Dave View Post
Have you got a mig welder?
Weld a small bolt in there.
Don't forget to remove you ecu's first.
I don't have a mig welder. The head is down inside a deep counter-bore though so there's no access. Thanks for the suggestion though!
David42U856 is offline   Reply With Quote
Old 24-06-21, 02:42 PM   #18
David42U856
Newbie!
Classic Audi Club Member
 
Join Date: Aug 2015
Posts: 17
Default

Quote:
Originally Posted by Groundhog View Post
Sorry to hear it wasnít successful. It would seem someone has been there before you and failed. The split bolt, I suspect, is as a result of a previous removal, Iím guessing someone hammered something to big in there, it had the desired effect in that I would imagine they removed it but then failed on the last bolt which is why the splined socket trick wonít work. I would do as you said replace the two and keep your fingers crossed.
I have never known a housing to split.
Waiting for the bolts and CV joint grease to be delivered. Hopefully they arrive in time to put it back together on the weekend. The grease in the prop-shaft CV joints was pretty dried out so I plan to clean and re-grease.
David42U856 is offline   Reply With Quote
Old 24-06-21, 03:58 PM   #19
John.
4 ring whore!
Classic Audi Club Member
 
John.'s Avatar
 
Join Date: Mar 2011
Location: Scottish Borders.
Posts: 7,374
Default

Quote:
Originally Posted by David42U856 View Post
Unfortunately, it's about 10mm down inside a counter-bore - so pretty inaccessible. Thanks for the suggestion though. I've never used a grip socket - sounds like it worth having in the tool kit.
This is the type, https://www.ebay.co.uk/itm/221924576...IAAOSwXWZgtjkC , very handy things to have but sounds like your bolts might just be un-accessible for them ?
John. is offline   Reply With Quote
Old 30-06-21, 08:31 AM   #20
David42U856
Newbie!
Classic Audi Club Member
 
Join Date: Aug 2015
Posts: 17
Default

Thanks for the link John. Much appreciated.
David42U856 is offline   Reply With Quote
Reply

Bookmarks

Tags
90q, gearbox, rear output shaft, seal

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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
Forum Jump


All times are GMT. The time now is 12:32 AM.

Powered by vBulletin®
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Copyright ©2007-2008 Classic Audi | Site by Roadrunna