On Sat, 24 Oct 1998 12:11:00 -0700 TheMole <dbilesky(at)home.com> writes:
>The No 2 con-rod bearing smeared. The oil hole on the bottom bearing
>was covered as a result of the smear.
You mean you spun the bearing?
Sounds like molten white metal clogged the oil hole, but probably after
the real damage had been done.
>I took both top and bottom out and replaced them but the connecting
>rod
>still has room to shake up, down and sideways.
How did the journal look to you after the shells were removed from the
rod?
Should be smooth, no groove (see a groove, skip to the teardown).
Measure the journal size with a caliper, at 12 and 6 o-clock, then 3 and
9 o-clock.
There should be no real difference, if there is, then you have egg shaped
the journal
and the motors gotta come apart.
Next take the OD figure that you measured and verify that it matches the
bearing
that you bought.
If the engine is a 1725, the STD rod journal is 2.125 with bearings
available at
2.115, 2.105, 2.095 and 2.085 at .040 under.
Dont bee too concerned about the side clearances (should be .010 but its
not
critical)
Also if you are in doubt as to the calibration of your "manual slop
detector" go buy
some plastigage.
>I am looking for a crack in the upper connecting rod that may be
>opening as
>I tighten the cap.
This isnt too likely to be an issue.
The big end of the con rod is not a high stess point of the con rod, and
if there was a metalurgical issue with that rod that had a crack,
the bearing would not likely have been spit out, and the rod would have
broken without any bearing damage.
Jarrid Gross
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