On Saturday, September 14, 2013 9:57:02 PM UTC-4, Snag's Shop wrote:
Some time ago I managed to tip my compressor over , landed on the pulley .
The pulley survived , but the connecting rods didn't . Snapped 'em both off
just above the big end . Fast forward to now , and the replacement pump I
bought is blowing oil ... from excessive blowby . I haven't pulled it down
yet , but the rings have gotta be shot or broken of just plain crap to begin
with cheap pump ... .

And this is where the wild idea comes in . The rods in the cheap pump
might fit , or they might not ... and if they don't I'm thinking about TIG
welding the broken ones back together . I can build a fixture to hold the
two bearings in alignment . I'd be most worried about the temper of the
repaired area , but a quick chill and a few days aging might get it back
enough .

Is this a waste of time , or do I stand a decent chance of having this
work ?

--

If it tipped over and the pulley didn't bend BUT it broke the rods I
would say it was junk to begin with. Just how much play is in that
crankshaft to allow it to shift far enough to break the rods?

TIG will just cause problems in the HAZ. Just holding them in alignment
and welding won't be much good since the rods will then build up
stresses in other areas, those will be enough to cause flex or breakage
as well.

If this is a good brand you can probably buy all the parts easy enough.

--
Steve W.