I've found two methods of finding the correct amount of crankshaft pre-load described on this forum:
"The generally accepted preload on the cranks is .05-.10mm[.002"-.004"] You should feel some drag but the crank should fall on its own when the heavy part of the flywheel is up" - wdietz186
"To do it right you will want to measure the crank end float with a dial indicator. Measure the end float and then add an extra 0.004"." - Den
Do the amount of pre-load using the two different methods end up as the same ?
Or to say it another way: How tight will the crank be using the "dial indicator method" ?
I have adjusted the end float twice, using the first method, but it ends up loose after a few thousand kms. The first time I used the smaller diameter shims which didn't work well because the base was a little concave, but now it is loose again
I'm afraid to put too much pre-load as this will stress the engine too much I guess ?
Stian
pre load: How tight ?
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- Cucciolo - the Lil Pup
- Posts: 20
- Joined: Mon Oct 12, 2009 11:50 am
Try calling or emailing Phil at [email protected] for advice.
He has some experience with roundcase bevels.
phil hitchcock
road and race
2 bon mace close
berkeley vale nsw 2261
australia
ph/fax 0243884211
international 61243884211
www.roadandrace.com.au
NOTE NEW EMAIL ADDRESS
[email protected]
He has some experience with roundcase bevels.
phil hitchcock
road and race
2 bon mace close
berkeley vale nsw 2261
australia
ph/fax 0243884211
international 61243884211
www.roadandrace.com.au
NOTE NEW EMAIL ADDRESS
[email protected]