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Registered
Join Date: Aug 2015
Location: Denmark
Posts: 19
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915 oversized pinion bearing insert
Treating my 915 with some new parts and my pinion bearing race is spun, which is pretty normal in alu 915's i guess. Considering a Loctite solution, but I think there is too much play for this to last very long.
I know the right fix is offered by several companies in the US, but in Denmark, where I roll, I dont know any. Since the main shaft race is OK, I dont want to throw money after a very expensive "8" shaped machining job offered by a German company + shipping. Since I am on a budget, I just want to fix the pinion race. Any experience with this bearing? A local machine shop should be able to insert this. My original race does not have that outside groove though. Why is it there? 
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09-07-2017, 12:07 PM
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Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,490
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I suppose a machine shop could bore the case a specific amount, BUT, How are they going to find the original center of the bore? The bore probably didn't wear evenly all around, but likely pushed the pinion bearing away from the ring gear.
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
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09-07-2017, 02:33 PM
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#147 of 2096
Join Date: Jul 2002
Location: Puerto Rico
Posts: 1,701
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Maybe is better to just use the one piece bearing holder.
Regards.
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#147 of 2096 |
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09-07-2017, 03:13 PM
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Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,490
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That doesn't fix the wallowed out bore though.
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
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09-07-2017, 03:24 PM
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Join Date: Jan 2009
Location: Marietta, Ga (Atlanta)
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Quote:
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'80SC Widebody 3.6 transplant Anthracite "The Rocket" Long gone but still miss them all: '77 911 Targa, '72 BMW 3.0CS Coupe(finest car I ever had!) '71 911T Coupe White, '70 911T Coupe Blue '68 911 Coupe Orange, '68 911L Soft Window Targa |
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09-07-2017, 03:57 PM
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Join Date: May 2008
Posts: 2,948
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Quote:
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Keep the Shiny Side UP! Pete Z. |
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09-07-2017, 04:07 PM
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gearhead
Join Date: Nov 2007
Location: Loverland, CO
Posts: 23,564
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Claus,
Have you tried Schönemann there in Denmark?
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1974 914 Bumble Bee 2009 Outback XT 2008 Cayman S shop test Mule 1996 WRX V-limited 450/1000 |
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09-07-2017, 04:17 PM
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Join Date: Aug 2015
Location: Denmark
Posts: 19
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I havn't measured, but I think JW is right - the bore is most likely oval or at least off center now.
As I undertand it, the one piece bearing retainer mostly supports the thrustbearing, but could it be used to locate the center of the bore behind it? Just an idea - I'm not a machining guy. I will try Lars Schönemann. I know of him and his racecars, RSR's etc. I am actually considering shipping it to CMS in Ca., since the price for a job like that in Europe would be approx. 1000$ plus shipping. Danish customs will tax my pants off though. |
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09-08-2017, 01:09 AM
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I took my sc trans case to a local machine shop and they knurled the bore and used a bearing loctite product. Has held up for years.
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09-08-2017, 05:14 AM
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Hi Claus.
I can help you. PM your phone number and i call you. I am in vejle.
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Daugaard |
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09-08-2017, 11:52 AM
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Hi Claus
Hopefully your Danish connecions can help. Otherwise Twinspark in NL appear to be high-end on fixing this sort of thing, but not cheap. Good luck 
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1981 911SC restomod "Minerva" 2004 Boxster S 2021 Cayman GTS 4.0 manual "Olive" 2014 Cayenne GTS V8 (wife's lover) The slope is not slippery; in fact it is entirely frictionless. |
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09-08-2017, 01:09 PM
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RS
SC
914
Boxster S
Minerva
Olive
