| [ Total Views: 637 | Total Replies: 6 | Thread Id: 106392 ] |
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 snowman9
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| posted on June 19th, 2014 at 11:17 AM |
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Type 1 main bearings
What's the story with main bearings these days?
After searching a few forums, I'm reading that the quality of available bearings has taken a dive - No. 2 main is no longer steel backed! Which
leaves me concerned and dismayed to say the least.
My late WD, AS41 case @ 0.50mm over, has been running the same bottom end for over 13 years (have split it to replace cam & lifters only in 2008).
I've ordered a 69mm CW crank from DPR machine and they can supply steel backed Silverline mains. My concern is that I've read else where that their
No.2 steel backed shells do not have a 360° groove at the crank surface.
I'm not sure of the sizes I will require, the case may need line boring to 0.75 and the crank isn't done yet so I don't know how far under it'll
be. I've found that in the past, odd sizes were sometimes difficult to source from either Tooleys or Fermans.
The set that's been running in this motor was sourced from Lionel (RIP): one gruff old bastard, but one of the nicest blokes in the VW trade I've
ever had dealings with. I miss him, but I digress.
So, are steel backed Mahle items still kickin' round on our sunny shores in maybe 0.50 / 0.75mm on the case & either 0.25/0.50mm on the crank ?
Any help is much appreciated.
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bajachris88
A.k.a.: Chris Leete
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| posted on June 19th, 2014 at 11:27 AM |
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Just to add, even the genuine vw main bearings (standard sized) are not all too flash either. The machine shop that checked clearances said they were
quite inconsistant with their tolerances.
(ô_!_/ô) (ô_!_/ô)
69' baja: kombi box, thing spindles, irs, disc front, type 3 rear drums, 2 inch lift kit, 31x10 rears. 
New engine in process: 94mm p&bs, 74mm C/w chomol Crank, 35.5x39 SP heads, turbo. Wierd combo, hopeful torque monsta! |
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 matberry
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| posted on June 19th, 2014 at 04:10 PM |
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Yep, RIP Lionel, he was a top bloke to deal with. 
I haven't needed to use them yet, but I believe the Silverline are the ones to use if your avoiding the non-steel backed
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE
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vwo60
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| posted on June 19th, 2014 at 05:45 PM |
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I have a few sets of silverline bearings with a set in my 2276 and set currently being fitted to a 2054, same issues with the bearing tolerance, a bit
hit and miss.
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 vw54
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| posted on June 19th, 2014 at 07:19 PM |
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| Quote: |
The set that's been running in this motor was sourced from Lionel (RIP): one gruff old bastard
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Which Lionel was that
Check with a few of the shops you may find some goodies
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snowman9
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| posted on June 20th, 2014 at 09:29 AM |
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Lionel Francis Dave, ex Fermans.
Yep, I'll do some chasing today.
Indeed Matt, I think I'd rather stick needles in my eyes than take the chance and use non - steel backed shells on No. 2. But, there's still the
issue of the absence of a 360° groove on the crank side.
Does anyone have any thoughts on this ?
Thank you for your replies Gentlemen
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snowman9
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| posted on June 21st, 2014 at 01:36 PM |
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| Quote: | Originally
posted by snowman9
But, there's still the issue of the absence of a 360° groove on the crank side.
Does anyone have any thoughts on this ?
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Sorry folks. Please disregard - was having a flash back to centre main bearings on Clevelands'.
Must be gettin' old 'n' doddery. WTF?
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