5.3 block, your thoughts
Thread Starter
Teching In
Joined: Dec 2012
Posts: 18
Likes: 0
From: indiana
5.3 block, your thoughts Hello guys, like many been an old school sbc guy for years. But now time out with the old in with the new.. Going this weekend to buy a 2004 5.3 block.. Has been clean and honed already by a local machinist whom I know.. I'm learning the LS stuff so bare with me.. Guy wants $150 for the block.. Good deal?? I think so.. It will need to bore tho, one cylinder has minor pitting. Maybe 10-15 tho at most what the machinist said.. The guy was selling block only because he built him a another 5.3 using his stock rotating assembly.. He did not trust the one cylinder with the pitting and choose not to bore block, so I will..lol..
Now I've read several times a 5.3 block can be bore 118 tho to a 3.89.. I would have block sonic check, but nobody around here in my area has a sonic checker..
Plans on build will be turbo , going into a back half 67 prostreet camaro.. Your thoughts and opinions.. Researching pistons now, I'm planing on useing a stock LS crankshaft when I find one..
Now I've read several times a 5.3 block can be bore 118 tho to a 3.89.. I would have block sonic check, but nobody around here in my area has a sonic checker..
Plans on build will be turbo , going into a back half 67 prostreet camaro.. Your thoughts and opinions.. Researching pistons now, I'm planing on useing a stock LS crankshaft when I find one..
TECH Fanatic
Joined: Jun 2011
Posts: 1,343
Likes: 8
From: Katy, TX
Honestly, I would pass on that block. Boring from 3.78 to 3.90 is a lot of machining, this cost me $300 a couple years back.
For the $450 you would have into this block, you can get a bare 6.0 block if you shop around. The 6.0 block may still need a slight hone, however you'll have a much better block to start your project.
The crank, rods, engine covers, accessories, etc. are the same on 5.3 and 6.0 motors also FYI.
For the $450 you would have into this block, you can get a bare 6.0 block if you shop around. The 6.0 block may still need a slight hone, however you'll have a much better block to start your project.
The crank, rods, engine covers, accessories, etc. are the same on 5.3 and 6.0 motors also FYI.
I wouldn't pay $150 for a block someone already passed over when I knew I was going to boost it.
5.3s are so wildly common you should just find a complete one rather than piece meaning one together from stuff mildly damaged.
5.3s are so wildly common you should just find a complete one rather than piece meaning one together from stuff mildly damaged.
