Are 6.2's/6.5's difficult to rebuild?

[vandelay industries]

Are 6.2/6.5 diesels difficult to rebuild?

What i mean is, i think most machine shops are very familiar with small block chevys(for example) and there are many books devoted to this very subject. So having an SBC machined and then bringing it home and putting it all together is really not a big deal.

i guess my questions are:
1) How does the shop know what specs to machine the block to? (i guess this would also apply to any other engine besides the small block/big block chevy........)

2) When you're putting it all back together, how do you know what torque specs, sequences and tricks (such as putting dabs of silicone in the corners when you're putting the intake manifold on as in the case of the small block......)

Would the service manual be good enough here?

i'm thinking of going with a new 6.5 from GM. But if they're not hard to rebuild then it could save several thousands of $$$

 

[Hogback Fabrication]

They probably made millions of them, you're far from the first to rebuild one. Find a shop that's comfortable working on one and it's the same as anything else.

 

[blazinzuk]

Nothing special.

Just make sure you get a crack free block. Look at new heads. My buddy just rebuilt a 6.5 the new improved castings heads were the not much more than rebuilding his

 

[campfire]

Lots of good info out there on rebuilding these engines. Haynes has a special manual dedicated to GM & Ford V8 diesel engines. That is what I used when rebuilding my dad's 6.5. There are also quite detailed instructions for 6.2 maintenance procedures in the military CUCV manuals.

 

[KirsL]

If you've rebuilt pretty much any V8 engine, you can do a 6.2/6.5. They go together like any other engine. A good manual with all your torque specs is good to have. You can take just about the whole engine apart with 10, 13, 15, and 18 mm sockets/wrenchs.

Some spots you do have to check for cracks and such. But it's nothing no one here can't help you do.