I didnot find specs for 2002 4.3 L. engine. I dont know if the specs for the 2004 4.3 L. would help. connecting rod first pass 20 lb ft
and final pass 70 degrees. For the crankshaft bearing cap bolts
first pass 15 lb ft and final pass 73 degrees. in the vehicule identification number , the 8 th number is the engine. the specs is the a vin X.
SOURCE: main and rod bearing torque specs
do you have a Haynes Manual or Chilton? if not check your local library, they may have one, the specs are in there
SOURCE: torque specs.
connecting rod = first pass 18 ft lbs , second pass 75 degrees
main bearings = first pass 37 ft lbs , second pass 77 degrees
wow that wasn't easy to find for some reason .
SOURCE: need torque specs 1988 Chevy silverado for main bearings and rod
Those values and most everything else you need for DIY work are contained in the Haynes manual for your vehicle.
We have one with each of our vehicles and not only give you the info needed to do repairs yourself but also get an idea of how much work a specific repair should (or shouldn't) cost.
'88 Chevy pickup manual
You can also buy these from auto parts stores for a few dollars less and sometimes on eBay for even less.
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