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oldslow Samba Member
Joined: July 27, 2019 Posts: 108 Location: Cape Cod
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Posted: Tue Jan 30, 2024 9:20 am Post subject: SPG Roller crankshaft- wrist pins |
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I promised I would build something with this crankshaft. So, after inspecting it some more I pushed a new wrist pin in. Slipped right in with no resistance and has a little wobble. To me his means worn. Two questions:
1. Just how worn is too worn to run AT ALL. If this thing could survive 10-20 thousand miles I would run it.
2. Is there a way to replace wrist pin bushings without removing them from the crank? I have nothing to loose by trying some out of the box method. _________________ - better to drive a slow car fast than fast car slow - |
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modok Samba Member
Joined: October 30, 2009 Posts: 26796 Location: Colorado Springs
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Posted: Tue Jan 30, 2024 5:38 pm Post subject: Re: SPG Roller crankshaft- wrist pins |
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In the industry we measure clearance by using units.
Do you use metric or imperial?
the manual has both.
What does it say in the manual?
How does that compare to your "looseness"
I'd sorry for being like that, but, how else are we going to do this? |
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[email protected] Samba Member
Joined: June 24, 2015 Posts: 720 Location: Rialto. CA
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Posted: Tue Jan 30, 2024 9:28 pm Post subject: Re: SPG Roller crankshaft- wrist pins |
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If your gonna use it forsure ..have it fix the right way ...why mickey mouse with it and hope it will last so long ....or just sell it to someone who really gonna use it and use it to its Potential ...last thing your gonna want to do it use it till it brakes and than want to sell it ...like I've seen guys do in the past with these roller cranks .... |
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RWK Samba Member
Joined: June 24, 2009 Posts: 1351 Location: S.W. MI
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Posted: Sat Feb 03, 2024 8:39 am Post subject: Re: SPG Roller crankshaft- wrist pins |
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Bushings can be removed without disassembly.
New bushing would have to be honed or reamed to fit pins after installing.
Maybe oversize pins? (hard chrome old ones?) then ream or hone to fit old bushings.
Probably require some custom tooling.
Bently manual shows several pics of manual rod repair to stock rods.
Problem with a roller crank is keeping the debris out.
Like Modak says, check to see if in tolerance or not. _________________ 73 Type 181
63 Type 113
63 Type 261- 428 071
62 Type 241-378 025 178 530 |
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Braukuche Samba Member
Joined: September 03, 2004 Posts: 11005
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Posted: Sat Feb 10, 2024 8:40 am Post subject: Re: SPG Roller crankshaft- wrist pins |
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Better keep them revs up. _________________ Go Reds! Smash state!
Retirement is here!
1956 Ghia
1959 SO-23 Westfalia
1960 double cab
1960 Baja Bug
1963 stretched double cab
1962 Golde sunroof Ghia
1963 356 B coupe
1963 Notchback
1967 21 window less rusty now |
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