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Cooper S diff drive flange leaks

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drmini in aust

Post subject: Cooper S diff drive flange leaks

Posted: Sat Jun 05, 2010 4:01 pm

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39762
Location: near Baulkham Hills, NSW

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... :!:

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:

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Mick

Post subject:

Posted: Sat Jun 05, 2010 4:07 pm

SooperDooperMiniCooper ExpertEngineering

Joined: Fri Apr 29, 2005 9:46 am
Posts: 18888
Location: Under the bonnet son!

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.

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SooperDooperMiniCooperExpertEngineering

All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.

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drmini in aust

Post subject:

Posted: Sat Jun 05, 2010 4:10 pm

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39762
Location: near Baulkham Hills, NSW

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.

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:

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gafmo

Post subject:

Posted: Sat Jun 05, 2010 8:54 pm

the King of Bling

Joined: Thu Jun 03, 2004 11:11 pm
Posts: 19858
Location: Baulkham Hills

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

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Stop Licking the Dog...I Don't Care Who Started It

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Morris 1100

Post subject:

Posted: Sat Jun 05, 2010 8:58 pm

Causing or creating vexation

Joined: Wed Jul 21, 2004 10:32 pm
Posts: 19124

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.

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GT mowog

Post subject: Re: Cooper S diff drive flange leaks

Posted: Sat Jun 05, 2010 9:00 pm

Mods rock!

Joined: Fri Oct 03, 2008 9:02 pm
Posts: 5079

drmini in aust wrote:

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.

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drmini in aust

Post subject:

Posted: Sat Jun 05, 2010 9:00 pm

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39762
Location: near Baulkham Hills, NSW

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- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:

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Morris 1100

Post subject:

Posted: Sat Jun 05, 2010 9:06 pm

Causing or creating vexation

Joined: Wed Jul 21, 2004 10:32 pm
Posts: 19124

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.

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!

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GT mowog

Post subject:

Posted: Sat Jun 05, 2010 9:09 pm

Mods rock!

Joined: Fri Oct 03, 2008 9:02 pm
Posts: 5079

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:

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gafmo

Post subject:

Posted: Sat Jun 05, 2010 9:15 pm

the King of Bling

Joined: Thu Jun 03, 2004 11:11 pm
Posts: 19858
Location: Baulkham Hills

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. :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.

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

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Stop Licking the Dog...I Don't Care Who Started It

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kiwiinwgtn

Post subject:

Posted: Sun Jun 06, 2010 3:54 pm

1098cc

Joined: Sun Feb 20, 2005 8:11 pm
Posts: 1347
Location: Wellington,

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.

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drmini in aust

Post subject:

Posted: Sun Jun 06, 2010 4:02 pm

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39762
Location: near Baulkham Hills, NSW

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.

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:

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kiwiinwgtn

Post subject:

Posted: Sun Jun 06, 2010 4:29 pm

1098cc

Joined: Sun Feb 20, 2005 8:11 pm
Posts: 1347
Location: Wellington,

yes rubber seal is a must and lots of sealant

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drmini in aust

Post subject:

Posted: Sun Jun 06, 2010 5:18 pm

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39762
Location: near Baulkham Hills, NSW

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... :lol:

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:

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drmini in aust

Post subject:

Posted: Mon Jun 07, 2010 7:37 pm

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39762
Location: near Baulkham Hills, NSW

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.

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:

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