Help!!!!!!!!!!! 4.8l - 5.3l

[PitchBlackC3]

What did the pistons you took out look like?

[carnell]

Bad call by the machine shop. The crank and pistons are for a 5.3L so all is good. I'm glad I had a chance to write you guys and look online, or I would have call the wrecking yard and looked like a ass!

Thanks guys for th quick help

Carnell

[zebra]

easiest way to tell with the heads off is if the pistons are flat-tops or not. 4.8 has flat; 5.3 has dished (except the L33 - it had flats too, but was an aluminum block)

[carnell]

I read that last night. I'm glad I took allot of pictures during the tear down

[Duct_tape123]

What is the CR of the L33? Wonder if its worth the work to switch the flat tops into my 5.3.

[carnell]

If you look at the pictures, you'll see that the pistons have rims, unless it's been rebuilt, it's a 5.3L. Due to wear, I had to get new pistons. I'm not sure if they are going to be flat tops

[zebra]

If you look at the pictures, you'll see that the pistons have rims, unless it's been rebuilt, it's a 5.3L. Due to wear, I had to get new pistons. I'm not sure if they are going to be flat tops

unless you're getting a huge cam or running boost, i don't see why you shouldn't get flat tops. i'd love a set. it'd definitely make my 93 tune more worth it

[farmtruc]

What is the CR of the L33? Wonder if its worth the work to switch the flat tops into my 5.3.

it's a little higher than 10:1, it's a nice engine and runs good.