4BRL69

Hey guys, new to the site. I am pretty familiar with engines, just not the Olds. I have a 69 Cutlass convertible and just picked up a 455 "f" series engine for it. It came out of a boat and looks like it took in some water through the intake. As far as I can tell, it was just rebuilt. I tore it down and the pistons looked like new and the cylinder walls still had the cross hatching in them. Only thing is that one cylinder wall had lots of corrosion like water had been sitting in there for a while. My question is that when I took it down to the local machine shop, they said no big deal, they would just put a new sleeve in that cylinder and lightly hone the rest of them. Can you actually sleeve these motors? And also, looking at the pistons they show that they are .30 over. How far can you safely go on the 455?

Thanks
Sage

joe_padavano

Properly done, a sleeve is fine. 0.060" overbores are not uncommon; this is not a thinwall motor.

442Harv

I have a 455 in my Vista Cruiser, 2 sleeves, and .060 over.

4BRL69

Thanks guys! Just wanted to be sure before I put out the coin!

tim72

Page,
You can go .040 over with no problem. I would do this just in case as you never know when you might have to go to .060. Are you sure you have to sleeve?

tim72

4BRL69

Sleeving the one bad cylinder saves me from having to buy eight new pistons. Since all the pistons look like new, I would rather put the $ into port matching the intake.