Crank Runout Help Please
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Crank Runout Help Please
Hello 2007 Street Glide 36,000 miles. Crank run out measured the traditional way shows less than .003 (picture on the right)
which is good I think? but when I measure movement by applying pressure in toward the case bearing with a bar, (picture on the left)
it shows .012 +/- is there a spec for that? Pictures attached to Illustrate.
which is good I think? but when I measure movement by applying pressure in toward the case bearing with a bar, (picture on the left)
it shows .012 +/- is there a spec for that? Pictures attached to Illustrate.
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This all started last year with the installation of an S&S bolt in 110 kit which knocked like hell because there was .006 clearance between the pistons and cylinders. I removed the kit and went back to my 103 set-up only to hear a different "knock". I was wondering if the 110 kit put something out of whack in the bottom end... so I started measuring run-out.
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The SM says endplay should be less than 0.010 on the crank. I'm not sure if there's been an update on the spec.
If you honed the 103 used cylinders and tossed in new rings on the replace, it would not surprise me if you had a little piston slap. You really need to set up piston clearances on the tight side if you don't like the rattle.
Add:
Picture not too good for us old guys. Not sure what you are trying to do but it's probably bearing play coupled with flex. Bearing might be loose but you really want to move the indicator closer to the bearing if you want to measure bearing play.
You don't want to apply too much pressure to get a good reading.
If you honed the 103 used cylinders and tossed in new rings on the replace, it would not surprise me if you had a little piston slap. You really need to set up piston clearances on the tight side if you don't like the rattle.
Add:
Picture not too good for us old guys. Not sure what you are trying to do but it's probably bearing play coupled with flex. Bearing might be loose but you really want to move the indicator closer to the bearing if you want to measure bearing play.
You don't want to apply too much pressure to get a good reading.
Last edited by Max Headflow; 04-25-2018 at 10:04 PM. Reason: Add: