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Question regarding the tools in the rebuild book
I just bought a snap on straight edge off of ebay. Where do i get a precise metric grade ruler for measuring the intermediate/cam gear straightness?
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2007 Mazda 3 hatch 1972 Porsche 914 roller with plenty of holes to fix ![]() |
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We used the depth portion of a venier caliper. It worked great and gave accurate repeatable measurements.
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Tim 1973 911T 2005 VW GTI "Dave, hit the brakes, but don't look like your htting the brakes...what? I DON'T KNOW, BRAKE CASUAL!!!" dtw's thoughts after nearly rear ending a SHP officer |
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GAFB
Join Date: Dec 1999
Location: Raleigh, NC, USA
Posts: 7,842
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Yes...you need to be able to measure to a hundredth of a millimeter for this procedure (max difference is .25mm), a vernier caliper is the only way I know of to perform this measurement. I think eBay would be a great place to look for a metric Vernier as well. I found plenty of nice standard ones in various stores, but the metric ones were crappy (bad selection).
Don't forget that Wayne's book is off in a couple places regarding this procedure (if you are using his book). The shims are .50mm thick, not .25mm. Also, subtact 54.8mm from your right-sprocket measurement, don't add it (this will make perfect sense when you do the procedure). Tim hit on an important point - keep repeating the measurement (baseline at your intermediat shaft, as well as your two cam sprockets) until you can consistently repeat your reading. Unless you are using the special tool from Stomski Racing, this measurement is a bit fiddly.
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Several BMWs |
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Senior Member
Join Date: Jan 2001
Location: Left Coast, Canada
Posts: 4,572
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I bought this tool from Stomski Racing for the job:
![]() Works very well. Easier and more accurate, too.
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'81 SC Coupe "Blue Bomber" "Keep your eyes on the road, and your hands upon the wheel."- J.D.M. |
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Now in 993 land ...
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I recommend mitotuyo's 6" digital caliper. It reads in inches and mm and is a very precise instrument. It runs around $120. Money well spent.
All that stomski tool does is keep the wife out of the garage. If someone just holds it steady for you there a couple of minutes, you don't need the holder. I guess the tool is still cheaper than a wife, but if you already have a wife, you may consider using her help! ![]() George |
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Author of "101 Projects"
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Right - there are two typos in the book in this section (see the website for updates).
I recommend the Stomski tool - we sell it on the site... -Wayne
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Wayne R. Dempsey, Founder, Pelican Parts Inc., and Author of: 101 Projects for Your BMW 3-Series • 101 Projects for Your Porsche 911 • How to Rebuild & Modify Porsche 911 Engines • 101 Projects for Your Porsche Boxster & Cayman • 101 Projects for Your Porsche 996 / 997 • SPEED READ: Porsche 911 Check out our new site: Dempsey Motorsports |
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Senior Member
Join Date: Jan 2001
Location: Left Coast, Canada
Posts: 4,572
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Quote:
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'81 SC Coupe "Blue Bomber" "Keep your eyes on the road, and your hands upon the wheel."- J.D.M. |
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