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gimmesomeshelter Samba Member
Joined: May 08, 2004 Posts: 1466 Location: San Carlos, CA
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Posted: Thu Aug 10, 2017 7:07 pm Post subject: Centering Pressure Plate |
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I've been told that the Brazilian pressure plates have a lot more slop than the German ones. I mocked up a German PP today. While it does have much less slop, it isn't perfect. How do I resolve this issue? Are there centering bolts I can use? Can a machinist balance and pin the PP to the flywheel so I have a reproducible reference points?
Cheers,
Paul _________________ "I would rather have questions that can't be answered than answers that can't be questioned."
Richard Feynman |
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anthracitedub Samba Member
Joined: June 20, 2007 Posts: 3241 Location: Michigan
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Posted: Fri Aug 11, 2017 5:12 am Post subject: Re: Centering Pressure Plate |
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You might look around for a engine builder that can do dynamic balancing of your rotating assembly.
I've never had issues with the hole clearance through the mounting of the plate. But I'm sure you could machine some shoulder bolts to take up this small amount of space to ensure a precise, repeatable install... but is the juice worth the squeeze on a low rpm, low hp engine? |
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Bulli Klinik Samba Member
Joined: January 16, 2005 Posts: 2078 Location: Bulli Klinik, Colorado Springs
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Posted: Fri Aug 11, 2017 7:55 am Post subject: Re: Centering Pressure Plate |
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The problem isn't so much the holes, it's that the ears on the perimeter of the plate are not a snug fit inside of the flywheel.
When I send my parts out to get balanced, I generally have the machine shop center the clutch, bolt it down and have two location pins drilled into the clutch and flywheel. That way it goes on the exact same way, is centered and doesn't affect the balance. _________________ I've never met a Bus I didn't like.
Mike K
Bulli Klinik
Colorado Springs |
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andk5591 Samba Member
Joined: August 29, 2005 Posts: 16757 Location: State College, PA
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Posted: Fri Aug 11, 2017 11:53 am Post subject: Re: Centering Pressure Plate |
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Just gonna take a stab if I were in your shoes. get some sheet metal that is damn close to what you need to fill the gap (aluminum flashing is pretty thing). Tape or glue it in place around the perimeter tabs so its centered and nail it down. _________________ D-Dubya Manx clone - 63 Short pan,1914.
Rosie 65 bug - My mostly stock daily driver.
Woodie 69 VW woodie (Hot VWs 7/12).
"John's car" 64 VW woodie - The first ever
Maxine 61 Cal-look bug - Cindy's daily driver.
Max - 73 standard Beetle hearse project - For sale
66 bug project - Real patina & Suby conversion
There's more, but not keeping them... |
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Mr. OGPaint Samba Member
Joined: September 24, 2010 Posts: 823 Location: Oregon
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Posted: Fri Aug 11, 2017 10:41 pm Post subject: Re: Centering Pressure Plate |
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Bulli Klinik wrote: |
The problem isn't so much the holes, it's that the ears on the perimeter of the plate are not a snug fit inside of the flywheel.
When I send my parts out to get balanced, I generally have the machine shop center the clutch, bolt it down and have two location pins drilled into the clutch and flywheel. That way it goes on the exact same way, is centered and doesn't affect the balance. |
This is a good approach _________________ https://instagram.com/mr.ogpaint
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Patrick Hall |
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Jacks Samba Member
Joined: July 15, 2006 Posts: 2347 Location: San Clemente, Ca.
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Posted: Fri Aug 11, 2017 10:48 pm Post subject: Re: Centering Pressure Plate |
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Get six 8mm countersunk screws. They are commonly used on VW door hinges. Install the pressure plate using the screws in the mounting holes. Tighten well. With a center punch, strike the pressure plate in several places around the perimeter, forcing the pressure to swell in to the gap of the flywheel, giving a tight fit. _________________ Jack Staggs
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modok Samba Member
Joined: October 30, 2009 Posts: 26785 Location: Colorado Springs
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Posted: Sat Aug 12, 2017 12:25 am Post subject: Re: Centering Pressure Plate |
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Two dowel pins is a good practical solution.
IMO, center it with feeler gauges. |
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