<VV> Rebuild II
Stephen Upham
contactsmu at sbcglobal.net
Sat Apr 9 12:18:45 EDT 2005
Well, I finally got around to Plastigaging the new (used) crank. I put
a pair of gauges in each of the mains at the 7:00 and 1:00 positions of
the bearings as you face the engine from the pulley side. I followed
the bolt tightening sequence per the shop manual and increased the lbs.
of torque from 20-35-53 graduating in order.
On the crank shaft which was positioned to TDC I found the following
readings from the front of the engine to the back.
Journal #1- 11:00 position (.001+ the width of the .003.5 part of the
measure gauge, which I would assume means that I have less than .001
clearance)
5:00 (.001)
#2- 11:00 (.015)
5:00 (.001)
#3- 11:00 (between .001 and .0015)
5:00 (.001 + the width of the
.015 part of the measure gauge)
#4- 11:00 (.001 + the width of the .002
part of the measure gauge)
5:00 (.001 + the width of the
.002 part of the measure gauge)
On the bearings:
LHS (left hand side. All at 7:00 position)
#1- .001 + the width of .0035 (approximately) part of the measure
gauge)
#2- .001
#3- .001 + the width of .001 (approximately) part of the measure gauge)
#4- .001 + the width of .0035 (approximately) part of the measure
gauge)
RHS at the 1:00 position
#1- .001 + the width of .0035 (approximately) part of the measure gauge)
#2- .015
#3- .015 (actually slightly longer, but difficult to measure[1/32 of an
inch?]
#4- .001 (actually slightly longer, but difficult to measure[1/32 of an
inch?]
Something tells me not to use these (standard size) bearings, eh?
Also, I'm feeling that I need to micrometer the crank as it seems (from
these various widths) that it is out of round. I don't have a
micrometer nor have I ever used one, but Auto Zone says they have one
for $30. Does that sound reasonable, or would it likely be a POC
(piece of crap) and thus useless?
I also have a set of rod bearings (also standard) that I haven't taken
out of the box to Plastigage yet. Would that be a waste of time
knowing what I know now?
Stephen Upham
(strong contender for the '05 Ralphie Award [the award for the worst
Corvair hard luck story] )
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