Jstock85

I am working on a 4.8 vortec out of a 2000 silverado and I broke off the bolt in the nose of the crank. This is a stock crank with the thicker flange. I know most of the 4.8/5.3 engines are very similar, my question is what crankshafts can I use to replace the stock one? Can I go to the local junk yard an pull one from a 5.3?


Thanks
Jeff

JoeNova

You can't use a 5.3 crank with 4.8 rods.
You can use a crankshaft without the thicker flange IIRC.

As long as its a 24x crankshaft, anything should fit in that block without issues.

big hammer

4.8 has an oddball stroke in the ls family. It's around 3.22".

Blowncoupe

iTrader: (1)

You can just drill out the bolt and remove it. If you don't feel up to it you could take to a machine shop I don't think it would cost as much as replacing the crankshaft

pantera_efi

iTrader: (1)

Hi, I go to the local EDM shop, Jerrys Tap & Drill, for bolt/stud removal.

Lance

Jstock85

I was going to look into taking it to a shop but was just checking if there was an easier option

billymgb1000

If you go with a 5.3 crank, you will need the 5.3 connecting rods, then use your 4.8 flat top pistons. And you'll have a high compression 5.3. that is my winter project this winter. good luck with what ever you do brother.