Friend has a .60 396. Bought a few years ago. Finally getting around to do something with it. I pulled the heads off and one of the pistons looks like its been melted. Would it be ok to still run it. Or should it be replaced?.
(http://i1001.photobucket.com/albums/af138/73chevytruck/20130828_174037_zps9ef7d56e.jpg) (http://i1001.photobucket.com/albums/af138/73chevytruck/20130828_174037_zps9ef7d56e.jpg)
need to put it out and look at it. if melt down the side into ring land then its junk. wrong octane gas or timming
Its a failer point waiting to happen I'd swap it out while its torn down just my 2 cents
X2 swap it out, and yea wrong octane, bad timing or running carb to lean is the cause
Quote from: xjs3667 on August 29, 2013, 07:07:19 AM
X2 swap it out, and yea wrong octane, bad timing or running carb to lean is the cause
or too much nitrous
replace it, it's just a bomb waiting to happen
Yea its going to be replaced.
Quote from: marshall on August 29, 2013, 10:08:58 AM
Quote from: xjs3667 on August 29, 2013, 07:07:19 AM
X2 swap it out, and yea wrong octane, bad timing or running carb to lean is the cause
or too much nitrous
:-) forgot about the nitrous loll. It will do it in a hurry
From what I understand somehow the heads had the wrong size valves in them but still let it run.
Wrong size valves wouldn't melt a piston...
Yes that's true what you have there is detonation cause by wrong timing or to low octane fuel or a combination of both