WHEN YOU REPLACE ROD BEARINGS YOU HAVE TO CHECK CRANKSHAFT JOURNALS WEAR.IF TAPER TOO MUCH.CRANKSHAFT HAS TO BE REGROUND OR REPLACE.YOU HAVE TO TAKE ENGINE OUT OF CAR.TO DO A SHORT OVERHAUL.YOU CAN REPLACE BEARINGS IN CAR USING ROLL OUT PINS AND DROP THE OIL PAN.BUT WHEN YOU REPLACING ROD BEARINGS AND MAINBEARINGS CRANKSHAFT HAS TO BE CHECK FOR WEAR.IF YOU PUT NEW ROD BEARINGS IN THEY WILL FAIL PREMATURELY.
SOURCE: tie rod end replacement and wheel bearing
best advice is a garage with the right equipment ,ever see a splinter in a eye from hammering a bearing out ,not very nice ,even worse sitting in emergency for 3 hrs waiting to see a doctor
SOURCE: changing rod bearings
You'll find that once you've removed the connecting rod cap, that you can easily replace that one of course, so take a small screwdriver and use it to push up on the other bearing, on the side that doesn't have the notch, you should be able to also push up a hair on the rod to get a little slack, but the bearing will slide around the crank and you just reinsert the smooth part first, kind of just the opposite of what you just did to reinstall. center the bearing in the rod, pull the rod flush with the crank and reinstall the lower cap and torque to specificatioin.
Of course, lots of oil on the bearings & crank, if there is damage to the crank, you may want to turn it enough with the cap & rod not on it to polish it a bit with emory cloth.
Clearance shouldn't be a factor but you must torque to the exact specs to get the correct "crush" on those bearings and provide proper contact, while not being too tight to cause immediate breakdown by not letting the oil pass & lubricate the crank.
Hope that sheds some light on it. Crank bearings can be changed the same way.
good luck.
SOURCE: need torque specs for 1.3 liter motor,connecting
MAIN BEARING TORQUE IS 36 -41 FT LBS. ROD BEARING TORQUE IS 24 -26 FT LBS
SOURCE: Main/Connector Rod bearing replacement
To do that properly you will have to pull the motor out, remove crank, check to see if you need standard or oversized bearings and do all new gaskets.
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