amc 20 cover gasket - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 09-11-2005, 02:45 AM Thread Starter
Stranger
 
Join Date: Aug 2005
Location: regina saskatchewan canada
Posts: 18
Thanks: 0
Thanked 0 Times in 0 Posts
 
amc 20 cover gasket

Does anyone know where I can Find a rubber gasket for a amc 20 rear end. I seem to get water in it alot and its a pain to dump the fuid. They shoud have drains on the diffs like they used to on the old trucks. I thought I saw one advertised once but now can't find it.
85jeep is offline  
Sponsored Links
Advertisement
 
post #2 of (permalink) Old 09-11-2005, 06:38 AM
Moderator
 
Jim_Lou's Avatar
 
Join Date: Dec 2001
Location: Belleville, Illinois
Posts: 11,485
Thanks: 15
Thanked 22 Times in 17 Posts
         
Re: amc 20 cover gasket

Next time you have the cover off drill and tap a hole in the bottom of the housing, and then clean the chips out. Stick an allen-head pipe plug in and you'll have your drain.

You'll probably have to make a rubber gasket. A parts house should have sheets of rubber gasket material. Just use a paper gasket as a template. Cut it carefully with a razor blade, and make the bolt holes with a paper punch.

You should also find out how water is getting into the housing. Is the vent line sound and run up high somewhere? I tied all the case vents into a hose inside the frame rail and ran it up to the air cleaner housing.
Jim_Lou is offline  
post #3 of (permalink) Old 09-11-2005, 06:59 AM
Can't Get Enough
 
Join Date: Mar 2000
Location: So. Jersey
Posts: 1,003
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: amc 20 cover gasket

Um...., sorry.... an Amc model 20 cover gasket has no bolt holes. It's just a flimsy ass thin cork thing. See if you can compare different gaskets. Some are thicker. Clean both surfaces, housing and cover thoroughly, then clean them again. Then I used Permatex Hi Tack(sp?). It's red and will make the gasket stick in its place while you get some bolts started. It's also kind of anal but see if you can draw the cover bolts in evenly to get the gasket to compress evenly.
JimmyZ is offline  
Sponsored Links
Advertisement
 
post #4 of (permalink) Old 09-11-2005, 07:08 AM
Keyboard Implanted
 
pontiac58's Avatar
 
Join Date: Jul 2000
Location: southern new jersey
Posts: 2,818
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: amc 20 cover gasket

i doubt the water is coming in from the gasket, like jim lou said, find where the water is coming in from.

If you want a drain, drill the housing, tap for 1/4 pipe and use a pipe plug. Again like Jimlou said. I do that to all my rears and any 9in i build for our customers.

For the cover gasket, just use silocone, put on a nice heavy bead, cause you have to fill that ring and smoosh the cover on, let it sit overnight and refill the next day.
pontiac58 is offline  
post #5 of (permalink) Old 09-11-2005, 08:16 AM
Old Hand
 
mach2_nh's Avatar
 
Join Date: Oct 2002
Location: Milford NH USA
Posts: 1,045
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: amc 20 cover gasket

Just user RTV for it. works good.
mach2_nh is offline  
post #6 of (permalink) Old 09-11-2005, 11:09 AM
Moderator
 
Jim_Lou's Avatar
 
Join Date: Dec 2001
Location: Belleville, Illinois
Posts: 11,485
Thanks: 15
Thanked 22 Times in 17 Posts
         
Re: amc 20 cover gasket

[ QUOTE ]
Um...., sorry.... an Amc model 20 cover gasket has no bolt holes.

[/ QUOTE ]

Generic instructions, not always applicable to specific situations.
Jim_Lou is offline  
post #7 of (permalink) Old 09-11-2005, 11:32 AM
I Might Just Know What I'm Talking About
 
jdoggmoney's Avatar
 
Join Date: May 2003
Location: Nebraska
Posts: 1,806
Thanks: 0
Thanked 1 Time in 1 Post
 
Re: amc 20 cover gasket

For my dif drains, I drilled a hole then welded a jamb nut to the inside of the cover (as low as possible) and use a 7/16 fine tread bolt with a gasket to seal things up. [img]/ubbthreads/images/graemlins/grin.gif[/img]
jdoggmoney is offline  
post #8 of (permalink) Old 09-11-2005, 05:37 PM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: amc 20 cover gasket

Fix your water problem and you won't need to keep draining it.

Two areas to check....the obvious is the vent line near the right spring.

A commonly ignored spot is where your brake line Tee attaches to the axle tube. If this bolt gets loose, you will get water in the housing. Make sure it is tight...better yet, pull it off and put some RTV under it before you put it back on.

Also make sure your not getting water in through the axle tube to pumpkin area. It won't hurt anything to run a bead of RTV around the seam...they only weld it in 3 or 4 places. (ok, that's 3 areas)
post #9 of (permalink) Old 09-11-2005, 05:49 PM Thread Starter
Stranger
 
Join Date: Aug 2005
Location: regina saskatchewan canada
Posts: 18
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: amc 20 cover gasket

OK I just put in new rear wheel bearings and new inner and outer oil seals so I hope this fixes the problem of water comming in. My vent tube is good and high. I mesured the case last time I had it apart and it didn't seem thick enough to drill and tap. I have a friend with a tig welder and he offered to put a drain hole on the bottom of the cover. I think I might do that. I know it wasn't leaking threw the cover but with a rubber reusable gasket It would save the drying time on the rtv silicone. I didn't relize the bolt on the brake went threw the tube I will stick a little silicon on there as well.. If any one has had this apart they will see a weep hole on the outer axel seal that goes out the back of the brake plate. I guess it is to let any leaking fluid out and off the brakes But it also gives water a straight path to the outer seal should there be a plug in it or some thing. I filled the area outside the seal with grease as well.
85jeep is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Off-Road Forums & Discussion Groups 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 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
Trackbacks are On
Pingbacks are On
Refbacks are On

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