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kangaboy
Samba Member
Joined: August 28, 2010
Posts: 1063
Location: St. Louis, Mo
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 Posted: Mon Aug 16, 2021 2:05 pm Post subject: Internal Groove Main Bearings |
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So after a quick search and a few phone calls...internal groove main bearings aren't being made anymore.
I found one seller in the classifieds that is asking $200 for a set of NOS bearings, and have also seen the option of milling out the insides of a steelbacked bearing.
So with my current crank being a straight drilled stroker, are my only current options to solve this situation finding a NOS set, or milling out a set of OD Grooved steel back bearings?
_________________
-74 Standard - "CaliBug" 2084T, MS3X w/FI and Crank Fire
-76 Westy - "Gandalf"
-18 GTI SE
| skills@eurocarsplus wrote: |
that fucking thing looks like it drove through a J.C. Whitney catalogue and hit everything on the way out  |
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Brian_e
Samba Member
Joined: July 28, 2009
Posts: 3285
Location: Rapid City, SD
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| Posted: Mon Aug 16, 2021 2:50 pm Post subject: Re: Internal Groove Main Bearings |
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Or you could cut a groove in the main journals like Scat does on their upper end cranks.
Brian
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55rag
Samba Member
Joined: April 27, 2004
Posts: 256
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| Posted: Mon Aug 16, 2021 7:07 pm Post subject: Re: Internal Groove Main Bearings |
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Empi stroker cranks have main bearing grooves as well. I think if you don't want to buy a new crank though your option is to groove the inside of the bearings. I just learned about all this myself from the great folks here.
Regards,
Jason
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55 ragtop bug
67 Ghia vert
85 911
18 GTI
Some beat up British bikes |
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challomoner
Samba Member
Joined: October 13, 2010
Posts: 1211
Location: IRELAND
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| Posted: Tue Aug 17, 2021 2:14 am Post subject: Re: Internal Groove Main Bearings |
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Jose at dpr says they're not necessary, I asked as I've a dpr straight drilled crank. I managed to find a nos internal grooved centre main bearing so I used it anyway.
Other DIY fixes recommended to me was to scallop the crank oil holes. |
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txoval
Samba Member
Joined: January 23, 2004
Posts: 3553
Location: The Woodlands, TX
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| Posted: Tue Aug 17, 2021 3:37 am Post subject: Re: Internal Groove Main Bearings |
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They are in the classified for less...I recently bought mine for $63 shipped.
What is your crank / case cut? |
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Ohio Tom
Samba Member
Joined: February 09, 2006
Posts: 1660
Location: Marshallville Ohio
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| Posted: Tue Aug 17, 2021 5:32 am Post subject: Re: Internal Groove Main Bearings |
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You could do nothing and run it as-is.
Plenty of motors survive just fine without grooves.
It's not really necessary, but.. if you really want it, then go for it... |
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kangaboy
Samba Member
Joined: August 28, 2010
Posts: 1063
Location: St. Louis, Mo
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| Posted: Tue Aug 17, 2021 6:11 am Post subject: Re: Internal Groove Main Bearings |
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| baz76 wrote: |
Jose at dpr says they're not necessary, I asked as I've a dpr straight drilled crank. I managed to find a nos internal grooved centre main bearing so I used it anyway.
Other DIY fixes recommended to me was to scallop the crank oil holes. |
I called Jose yesterday and he was basically appalled that I was questioning it
I explained my concern and he said it would be fine with external grooved bearings...
It still concerns me, but to a much lesser degree now.
EDIT: I currently have new std/std Silverline Main Bearings that were initially going to be used prior to noticing the single drill/no scalloped crank hole.
_________________
-74 Standard - "CaliBug" 2084T, MS3X w/FI and Crank Fire
-76 Westy - "Gandalf"
-18 GTI SE
| skills@eurocarsplus wrote: |
that fucking thing looks like it drove through a J.C. Whitney catalogue and hit everything on the way out |
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neil68
Samba Member
Joined: March 17, 2007
Posts: 3440
Location: Calgary, Canada
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| Posted: Wed Aug 18, 2021 6:47 am Post subject: Re: Internal Groove Main Bearings |
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Ebay is your best bet for internal grooved split bearing. Just bought some a few months ago.
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Neil.
Der Kleiner Rennwagens
68 Beetle 2332 cc, 204 WHP
12.5 seconds @ 107 mph
Dynojet Test: https://www.youtube.com/watch?v=M9B_H3eklAo |
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