mikeyb Posted May 8, 2007 Share Posted May 8, 2007 In a conversation yesterday, I was told that Mk1's don't suffer from this - just Mk2's and Stags . . . .If this is true, why? Link to comment Share on other sites More sharing options...
Spitfire2500 Posted May 8, 2007 Share Posted May 8, 2007 The design was altered slightly in approx 1971 (don't know why) which seemed to make it weaker and more prone to failure.As far as I know it doesn't seem to be much of an issue for road cars in the UK but does affect folks in SA and Oz etc where the cars do huge mileages.There was a bit of discussion about this not so long ago -- I think I remember Canley Dave saying he had stockpiled strengthened Mk II diff nose cones but he'd never sold any :X Link to comment Share on other sites More sharing options...
Jason Posted May 8, 2007 Share Posted May 8, 2007 I seem to recall the factory used MkI components when building the MkII World Cup cars' rear diff/suspension so it does sound plausible Link to comment Share on other sites More sharing options...
Richard B Posted May 8, 2007 Share Posted May 8, 2007 Hmmm MkI subframe mount bushes are different to MkII (wonder if they meant those?). Also the drive line was shifted on later MkII's, there are early & late MkII nose-pieces. 1 5/8'' & 1 7/8'' are the two types.According to CW the usual cause of failure is the diff seal failing and letting the diff oil wash out the grease in the sealed-for-life bearing, located in the nose piece. If the seal has failed you have to change the seal & the nose bearing. CW always recommended a leather seal rather than plastic (neoprane), something to do with temperature & sealing. Link to comment Share on other sites More sharing options...
heraldcoupe Posted May 8, 2007 Share Posted May 8, 2007 [quote by=Richard_B link=Blah.pl?b=2000,m=1178625890,s=3 date=1178630403]According to CW the usual cause of failure is the diff seal failing and letting the diff oil wash out the grease in the sealed-for-life bearing, located in the nose piece.[/quote]I don't think this is the failure mode in question. The nose piece itself on the Mk2 is prone to breakage, rather than failure of the bearing. I've no personal experience of this, but then I've only lived with Mk1s. Cheers,Bill. Link to comment Share on other sites More sharing options...
Spitfire2500 Posted May 8, 2007 Share Posted May 8, 2007 [quote by=Richard_B link=Blah.pl?b=2000,m=1178625890,s=3 date=1178630403]According to CW the usual cause of failure is the diff seal failing and letting the diff oil wash out the grease in the sealed-for-life bearing, located in the nose piece.[/quote]That's something different.From CW's product list page 2:"REINFORCED DIFF NOSE/SUBFRAME BRACKETS.......There are two types of nose piece...early 1 7/8" late 1 5/8"; changed at ME 42722 + MG 21067"The later type is known to be weaker. Link to comment Share on other sites More sharing options...
AlanChatterton Posted May 8, 2007 Share Posted May 8, 2007 late ones are more prone to breaking, but S Estates seem to be the worst ones......... Link to comment Share on other sites More sharing options...
2420DH 2.5PI Posted May 8, 2007 Share Posted May 8, 2007 going back to the world cup rally cars...i do seem to remember that MK2 ones had the superior MK1 type diff cradle fitting that was also used on stags and estates....cant understand as to why the factory designed a different fitting for the MK2 saloons only ?...perhaps our man from canley can enlighten us all , im sure he,s the authority on this subject! Link to comment Share on other sites More sharing options...
valencia1 Posted May 8, 2007 Share Posted May 8, 2007 had one go on a 76, 2500tc saloon. started of with a squealing from under the car, but limped the few miles home ok. i believe the welding on tube to brackets was suspect on later cars?regards, bryan Link to comment Share on other sites More sharing options...
Greeks Posted May 8, 2007 Share Posted May 8, 2007 My 'S' has these supports welded in ... a common mod. by the saloon guru in Queensland: Link to comment Share on other sites More sharing options...
Deleted User Posted May 9, 2007 Share Posted May 9, 2007 [quote by=2420DH_2.5PI link=Blah.pl?b=2000,m=1178625890,s=7 date=1178656881]going back to the world cup rally cars...i do seem to remember that MK2 ones had the superior MK1 type diff cradle fitting that was also used on stags and estates....cant understand as to why the factory designed a different fitting for the MK2 saloons only ?...perhaps our man from canley can enlighten us all , im sure he,s the authority on this subject![/quote]This is what a factory rally car looks like in the boot after modification. Basically they just grafted in the wide mounting MKI/Stag type fixings. Link to comment Share on other sites More sharing options...
Deleted User Posted May 9, 2007 Share Posted May 9, 2007 Plus some estate car strengthening bits by the looks of it Link to comment Share on other sites More sharing options...
Deleted User Posted May 9, 2007 Share Posted May 9, 2007 Actually it's very fortuitous that we have WRX here as a pattern because our own WC car has had that area (diff mounting) comprehensively destroyed by a later solid axle conversion. Link to comment Share on other sites More sharing options...
Fuzzy Harris Posted May 9, 2007 Share Posted May 9, 2007 Dave, did WRX have a firewall fitted ? and which car is picturd on your thread ? Link to comment Share on other sites More sharing options...
Deleted User Posted May 9, 2007 Share Posted May 9, 2007 Firewall? I can't remember, it was (is) a bare shell when we got it, and I haven't noticed it in the box of stuff that came with it.It's WRX pictured. Link to comment Share on other sites More sharing options...
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