Dont even worry about it, that **** will buff out.

 

oh yeah, a little jbweld, some duct tape, and bondo, and she's as good as new.. lol

Edit: BTW, on that pic of the heads, on the left head it says 4.8 on the casting. I just noticed that today, do all of them have that on there, or has someone swapped the heads or motor at some point?

 

I believe if the camera was a bit lower you could see 5.3 below the 4.8.

 

The casting number on the outside is what you need to look at.

 

JB Weld FTW... Hope you get it sorted out man.

 

man have we seen this alot lately

i have never done this just melted pistons

 

aw man I thought you had real problems just drop in some engine stop leak crap and it'll be good for another 80k miles.

 

You mean like this one?

 

This happened to me last year.. lol I just now got around to tearing it down.. BTW, I got everything from this motor for sale if anybody needs parts. here is a link to the for sale thread, just PM me if you want anything.
https://www.performancetrucks.net/fo...d.php?t=396508

 

GM has always used 2 casting numbers for each Gen 3 engine combination. For example early year 5.3l engnies have cast numbers 706 & 862. Early year 5.7l engines use 241 and 853 cast numbers. LS6 engines use 243 and 799 cast numbers. I don't have an explaination for this, just an observation. (Cut and paste from Richard at WCCH)