ausmini :: View topic - Cooper S diff drive flange leaks

not that you take it easy on those hardies.
But I must say this is why I like my Pot Joints. Its all sealed no nuts & ubolts and less wear and less lose of HP

I took the 1360 out today, when I undid the Hardy Spicer U/Js, oil dripped out from inside the flanges.
The 2x S rubber `seals' that they put in the gearbox gasket kits now are junk, just natural rubber, it's allergic to oil and rots... :evil:

Were new 11,000 miles ago.

I'm going to turn up some lurethane ones before the 1412 stroker goes in.

I'm sure the BMC originals were neoprene or nitrile rubber, when genuine parts could be got.

BTW The 2 rubbers that go in the top of the rocker cover have the same problem... :!:

gafmo wrote:

not that you take it easy on those hardies.
But I must say this is why I like my Pot Joints. Its all sealed no nuts & ubolts and less wear and less lose of HP

And only one little circlip away from disaster. :mrgreen:

Mind you I have never seen one fail yet.

Morris 1100 wrote:

gafmo wrote:

not that you take it easy on those hardies.
But I must say this is why I like my Pot Joints. Its all sealed no nuts & ubolts and less wear and less lose of HP

And only one little circlip away from disaster. :mrgreen:

Mind you I have never seen one fail yet.

Well, all Minis have that same clip setup inside the CV too, it's common for the shafts to pull out of them. Yeah I've seen that happen often.

Morris 1100 wrote:

gafmo wrote:

not that you take it easy on those hardies.
But I must say this is why I like my Pot Joints. Its all sealed no nuts & ubolts and less wear and less lose of HP

And only one little circlip away from disaster. :mrgreen:

Mind you I have never seen one fail yet.

Well, all Minis have that same clip setup inside the CV too, it's common for the shafts to pull out of them. Yeah I've seen that happen often.

drmini in aust wrote:

Morris 1100 wrote:

gafmo wrote:

not that you take it easy on those hardies.
But I must say this is why I like my Pot Joints. Its all sealed no nuts & ubolts and less wear and less lose of HP

And only one little circlip away from disaster. :mrgreen:

Mind you I have never seen one fail yet.

Well, all Minis have that same clip setup inside the CV too, it's common for the shafts to pull out of them. Yeah I've seen that happen often.

The shafts can come out of the CVs but it's not possible for the in-board CV to come completely out of the gearbox, the engaugement is too long.

On the other hand if the bolt on your hardie flanges come out, the flange can come out of the gearbox. I have seen that happen.

Should have put an R clip in it to hold the bolt from coming undone :roll:

I have seen gasket sealant (comes in a small gray tube) used under the washer and around the bolt to seal these up or they leak.

Author:	drmini in aust [ Sat Jun 05, 2010 4:01 pm ]
Post subject:	Cooper S diff drive flange leaks
I took the 1360 out today, when I undid the Hardy Spicer U/Js, oil dripped out from inside the flanges. The 2x S rubber `seals' that they put in the gearbox gasket kits now are junk, just natural rubber, it's allergic to oil and rots... Were new 11,000 miles ago. I'm going to turn up some lurethane ones before the 1412 stroker goes in. I'm sure the BMC originals were neoprene or nitrile rubber, when genuine parts could be got. BTW The 2 rubbers that go in the top of the rocker cover have the same problem...

Author:	Mick [ Sat Jun 05, 2010 4:07 pm ]
Post subject:
I've picked up that some mechanics use the old ones and fortify (if thats a valid description of the term) them up with silicone when they put them back in. I chucked new ones in my gearbox, I hope they keep up. Mine's got about 6k on it now.

Author:	drmini in aust [ Sat Jun 05, 2010 4:10 pm ]
Post subject:
I'd be careful what grade silicone, the usual builders stuff gets dissolved by oil and petrol, I found out the hard way (boat fuel tank) years ago. Engine gasket silicone should be OK.

Author:	gafmo [ Sat Jun 05, 2010 8:54 pm ]
Post subject:
not that you take it easy on those hardies. But I must say this is why I like my Pot Joints. Its all sealed no nuts & ubolts and less wear and less lose of HP

Author:	Morris 1100 [ Sat Jun 05, 2010 8:58 pm ]
Post subject:
gafmo wrote: not that you take it easy on those hardies. But I must say this is why I like my Pot Joints. Its all sealed no nuts & ubolts and less wear and less lose of HP And only one little circlip away from disaster. Mind you I have never seen one fail yet.

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Author:	GT mowog [ Sat Jun 05, 2010 9:00 pm ]
Post subject:	Re: Cooper S diff drive flange leaks
drmini in aust wrote: I took the 1360 out today, when I undid the Hardy Spicer U/Js, oil dripped out from inside the flanges. The 2x S rubber `seals' that they put in the gearbox gasket kits now are junk, just natural rubber, it's allergic to oil and rots... Were new 11,000 miles ago. I'm going to turn up some lurethane ones before the 1412 stroker goes in. I'm sure the BMC originals were neoprene or nitrile rubber, when genuine parts could be got. BTW The 2 rubbers that go in the top of the rocker cover have the same problem... I have to say that many of the rubber seals (ha!) that are made (or at least available) for Minis these days are not too good at all. The shaft type seals still seem OK, but the rubber stuff is quite poor. Disappointing situation.

Author:	drmini in aust [ Sat Jun 05, 2010 9:00 pm ]
Post subject:
Morris 1100 wrote: gafmo wrote: not that you take it easy on those hardies. But I must say this is why I like my Pot Joints. Its all sealed no nuts & ubolts and less wear and less lose of HP And only one little circlip away from disaster. Mind you I have never seen one fail yet. Well, all Minis have that same clip setup inside the CV too, it's common for the shafts to pull out of them. Yeah I've seen that happen often.

Author:	Morris 1100 [ Sat Jun 05, 2010 9:06 pm ]
Post subject:
drmini in aust wrote: Morris 1100 wrote: gafmo wrote: not that you take it easy on those hardies. But I must say this is why I like my Pot Joints. Its all sealed no nuts & ubolts and less wear and less lose of HP And only one little circlip away from disaster. Mind you I have never seen one fail yet. Well, all Minis have that same clip setup inside the CV too, it's common for the shafts to pull out of them. Yeah I've seen that happen often. Yes, I have seen the shaft fall out of the outer CV a few times. I fit new clips to them and keep the old clips in the toolbox!

Author:	GT mowog [ Sat Jun 05, 2010 9:09 pm ]
Post subject:
drmini in aust wrote: Morris 1100 wrote: gafmo wrote: not that you take it easy on those hardies. But I must say this is why I like my Pot Joints. Its all sealed no nuts & ubolts and less wear and less lose of HP And only one little circlip away from disaster. Mind you I have never seen one fail yet. Well, all Minis have that same clip setup inside the CV too, it's common for the shafts to pull out of them. Yeah I've seen that happen often. The shafts can come out of the CVs but it's not possible for the in-board CV to come completely out of the gearbox, the engaugement is too long. On the other hand if the bolt on your hardie flanges come out, the flange can come out of the gearbox. I have seen that happen. Should have put an R clip in it to hold the bolt from coming undone

Author:	gafmo [ Sat Jun 05, 2010 9:15 pm ]
Post subject:
GT mowog wrote: drmini in aust wrote: Morris 1100 wrote: gafmo wrote: not that you take it easy on those hardies. But I must say this is why I like my Pot Joints. Its all sealed no nuts & ubolts and less wear and less lose of HP And only one little circlip away from disaster. Mind you I have never seen one fail yet. Well, all Minis have that same clip setup inside the CV too, it's common for the shafts to pull out of them. Yeah I've seen that happen often. The shafts can come out of the CVs but it's not possible for the in-board CV to come completely out of the gearbox, the engaugement is too long. On the other hand if the bolt on your hardie flanges come out, the flange can come out of the gearbox. I have seen that happen. Should have put an R clip in it to hold the bolt from coming undone got that covered as I purchased a new pair on Friday from Kc's. Piece of mind but @ $10.40 its something you have to pay

Author:	kiwiinwgtn [ Sun Jun 06, 2010 3:54 pm ]
Post subject:
I have seen gasket sealant (comes in a small gray tube) used under the washer and around the bolt to seal these up or they leak.

Author:	drmini in aust [ Sun Jun 06, 2010 4:02 pm ]
Post subject:
kiwiinwgtn wrote: I have seen gasket sealant (comes in a small gray tube) used under the washer and around the bolt to seal these up or they leak. I use `3 bond' silicone sealer there on 850/Mini Deluxe/Mini K flanges, it seems to work OK. But I think the Hardy Spicers really need a rubber in there to sit against the 2 split collets.

Author:	kiwiinwgtn [ Sun Jun 06, 2010 4:29 pm ]
Post subject:
yes rubber seal is a must and lots of sealant

Author:	drmini in aust [ Sun Jun 06, 2010 5:18 pm ]
Post subject:
I'll machine some lurethane seals from a spare set of engine steady or tiebar poly rubbers. I knew they'd eventually be useful for something...

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Author:	drmini in aust [ Mon Jun 07, 2010 7:37 pm ]
Post subject:
Nolathane tie bar rubbers are the same diameter as these `seals', I just have to slice some bits off em in the lathe, parallel and approx the same thickness (a little less for lurethane). Can get 2 out of each rubber. I'll put a smear of 3 bond sealant on em when fitting.