Slackdabber Posted yesterday at 02:48 PM Report Share Posted yesterday at 02:48 PM (edited) 199A Rebuild progressed smoothly....until, the slightest tightening of the engine bolts and the ignition side crank flywheel is binding on the LH Crankcase. Main bearings are where they should be and the crank belongs to this motor. Any thoughts/suggestions please? Also the crank pin isn't flush with the crank halves, on the LH side which is fouling, it is recessed, on the other half it is very slightly proud. Should it not be flush on both sides? Edited yesterday at 03:58 PM by Slackdabber Additional info Quote Link to comment Share on other sites More sharing options...
konrad Posted 23 hours ago Report Share Posted 23 hours ago I think this relates to your prior post about huge side-clearance on connecting rod. I have read about the washers on the piston pin, but have never seen a motor that used the technique. What struck me as odd, is that the big-end bearing itself seems to have a lot of clearance to the crank wheels and could walk from one side to the other. So, even though that motor may use washers on the piston pin for rod centering, it may still be that the crank wheels are too far apart. But this is all speculation on my part. I don't work on "antique" motors. 1 Quote Link to comment Share on other sites More sharing options...
lineaway Posted 15 hours ago Report Share Posted 15 hours ago (edited) So I looked at your pictures. Show us how the pin sits in the crank from a side view. Most rods only needed 18 thousands clearance. Granted I have luckily not done a bul. Edited 15 hours ago by lineaway 1 Quote Link to comment Share on other sites More sharing options...
Slackdabber Posted 4 hours ago Author Report Share Posted 4 hours ago Crank pin position Quote Link to comment Share on other sites More sharing options...
lineaway Posted 2 hours ago Report Share Posted 2 hours ago There you go, it is not pressed all the on the one side Quote Link to comment Share on other sites More sharing options...
konrad Posted 2 hours ago Report Share Posted 2 hours ago Is that a crack? Quote Link to comment Share on other sites More sharing options...
Slackdabber Posted 2 hours ago Author Report Share Posted 2 hours ago 11 minutes ago, konrad said: Is that a crack? No, doesn't appear to be looking through a magnifier. Quote Link to comment Share on other sites More sharing options...
konrad Posted 34 minutes ago Report Share Posted 34 minutes ago 1 hour ago, Slackdabber said: No, doesn't appear to be looking through a magnifier. Can you feel anything with a sharp-tipped scribe? A crack could explain the problem you are having. Another thing to consider is the history of the crankshaft. After repeated pressings, the pin/crankwheel interference fit can become too loose. If you have a dial indicator and a means of supporting the crankshaft, measuring the runout could tell if the crank wheels have shifted position, Quote Link to comment Share on other sites More sharing options...
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