Frozen ABA crank during rebuild pt II

[ats at longcoeur.com (Patrick Bureau)]

Humm did you check the clearence of each piston ring inside the chamber and
make sure it fits with the required gap between each ends of the ring?
Did you check the size of the piston chamber top middle and bottom ?


-
ATS - Patrick Bureau - http://ats.longcoeur.com
ATS A1 Parts eBay Sales - http://tinyurl.com/22e5b 

->-----Original Message-----
->From: scirocco-l-bounces@scirocco.org 
->[mailto:scirocco-l-bounces@scirocco.org] On Behalf Of Jeff Toomasson
->Sent: Tuesday, April 27, 2004 10:42 PM
->To: scirocco-l@scirocco.org
->Subject: Frozen ABA crank during rebuild pt II
->
->First - thanks to those who responded the first time around.
->
->Taking Anson's advice, I checked the axial play of the rods 
->and isolated the binding to piston/rod assembly #2. Sure 
->enough, removal of piston/rod #2 allowed the crank to spin 
->smoothly. Then I collapsed the rings of piston #2 and 
->installed it upside-down from the top and was able to lift 
->and lower it pretty easily by hand. On top of that, I took 
->both the rod cap and rod base (w/ bearings) and "rotated" 
->them around the underside of the #2 crank bearing surface 
->with no problem.
->
->But I bolt it all back together and it 
->binds...ggrrrrr....axial play is not manually detectable (I 
->don't have feeler gauges)
->
->My theories:
->
->1) something on the side of the rod journal is binding on the 
->crank or it's just too wide
->
->2) some portion of the #2 crank surface is warped
->
->Again, rod/main bearings are new and standard and have passed 
->tolerances as measured by plastigauge.
->
->Can I have the rod machined on the sides to increase axial 
->clearance? Is this not recommended?
->
->Input is always welcome.
->
->Thanks, Jeff
->
->
->_______________________________________________
->Scirocco-l mailing list
->Scirocco-l@scirocco.org
->http://neubayern.net/mailman/listinfo/scirocco-l
->
->