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-   -   Question regarding the tools in the rebuild book (http://forums.pelicanparts.com/911-engine-rebuilding-forum/133867-question-regarding-tools-rebuild-book.html)

1fastredsc 10-31-2003 06:27 AM

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?

Tim Walsh 10-31-2003 06:42 AM

We used the depth portion of a venier caliper. It worked great and gave accurate repeatable measurements.

dtw 10-31-2003 07:57 AM

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.

Doug Zielke 10-31-2003 05:10 PM

I bought this tool from Stomski Racing for the job:

http://forums.pelicanparts.com/uploa...1067652556.gif

Works very well. Easier and more accurate, too.

aigel 10-31-2003 06:43 PM

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

Wayne 962 10-31-2003 08:31 PM

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

Doug Zielke 11-01-2003 06:55 AM

Quote:

Originally posted by aigel
All that stomski tool does is keep the wife out of the garage.
And that alone, makes the tool worth far more than they ask for it.


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