6.2 - 6.5 internals

[sshewins]

Hey guys and MGW, I'm thinkin bout using a 6.2 short block with the 6.5 heads. I know that part will work. I don't remember if I can punch out the .2 to .5 specs and use the pistons, rods and crank from a .5? Or will I have to use the .2 stuff in the block? If so, does Scat make a crank for the .2? Just think out loud.

Thanks in advance,

 

[Turbine Doc]

Just build to 6.2 spec, the .3 L difference won't be noticed, may want to do a little overbore on the 6.2, Heath builds most of his that way, give them a call for specifics

 

[packratt]

Unless it is a late model 6.2 (during the 6.2-6.5 transition years) the SCAT crank will not work. The early 6.2s were 2 piece rear main seal and the 6.5 is a 1 piece seal. SCAT doesn't make a 6.2 crank.

 

[sshewins]

Ok, thanks guys. Thats kinda what I was thinking. Do you think a built up .2 bottom end will hold up to a GL4 & ATT? Would studs be needed? Girdle? (Not too built up - I'm on a new found budget) TIA,

 

[packratt]

Take a look at Slim's truck specs. He is running a 6.2/6.5. My new motor will be one http://www.dieseltowingresource.com/showpost.php?p=98725&postcount=14

 

[Slim Shady]

Ok, thanks guys. Thats kinda what I was thinking. Do you think a built up .2 bottom end will hold up to a GL4 & ATT? Would studs be needed? Girdle? (Not too built up - I'm on a new found budget) TIA,

A good seasoned 6.2 block will hold up just fine. The early 6.2 blocks had good metal content and tended not to crack like the later 6.5 blocks. You can get the 6.2 bored .040 oversize and get a 6.3 lite motor. You will never miss the .2 liter difference.

 

[sshewins]

Slim, I know your running the .040 over, but is that safe? I thought .020 was the most you should go. Well, at least thats what I've heard.

 

[Slim Shady]

Slim, I know your running the .040 over, but is that safe? I thought .020 was the most you should go. Well, at least thats what I've heard.

.040 is the maximum oversize I would go. I think they make 60 over pistons, but I would think that would be pushing it. I also am using a block that has 2 cylinders that have been sleeved. I have run many blocks with sleeves and over sized pistons. It used to be that when you fixed things, they were supposed to be as strong if not stronger than the original. Sleeved blocks run just fine as do over bore pistons. They wouldn't make pistons oversize if they were not an approved repair. Guess I am old school when it comes to repairs.