Would someone please explain to me what the following terms mean, the
differences between them and which if any are the same?
crank pin, main bearing vs. big end bearing (the last 3 from pg 109 Bentley
manual) , main bearing journal, crankshaft journal, rod journal, wrist pin.
Also this excerpt from the archives - "rod journal had scored a bit because
the big end of its rod had stretched a couple of thousands, but a regrind to
0.010 under cleaned everything up." What is the big end of the rod? Is it
the half of the cup that holds the connecting rod upper bearing?
I'm going to venture that a "crankpin" is the same as a 'rod journal" or
"connecting rod journal" all of which are the bright silver portion (the part
you don't want to scratch) between the crankshaft webs that the 6 connecting
rod bearings wrap around. And that the similar part on the centerline of the
crankshaft is the "crankshaft journal" which is the same as the "main bearing
journal" or the bright silver portion of the crank that the 4 cranksaft
bearings wrap around. So what is the difference between the main bearings and
big end bearings. What is the "big end"?
Apologies for my ignorance.
Jim Sloan
74 TR6
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