Any 6.2 and 6.5 Chevy Diesel experts here

[luvrbus]

Will the crankshaft from a 6.5 work in a 6.2,the 6.5 is from a bus that was run hot.The 6.2 was one of the goverments famous rebuilds that broke a crank while unloading and Iron Planet the seller will not make it good.I need to make one or the other work.I would ask on F/B but I don't need all the drama

[chessie4905]

I've worked on several, but I don't  know the answer to that one. Here:

https://www.dieselplace.com/threads/6-2-6-5-crankshafts-interchangeable.248146/

[chessie4905]

check closely for cracks in heads between valves. They can be repaired, but not by any glue or welding. I'll  respond if you have them.

[luvrbus]

They have a few cracks around pre cups is about all,where can I find out about the crank,I know some have different rear seals.What I need is good manuals for both engines the crap manuals you buy from Auto Zone like the Chilton for the engines are a waste of money IMO 

[chessie4905]

If you look on the side of head, don't  recall anymore, there is a approx 1/4 to 3/8 hole plug for each cylinder. behind each one is a short drilled water passage that terminates between valves. There is a kit that drills out thet bore slightly to accept a bronze sleeve. After drilling, you use a reamer to finish size the bore. Then you take this special sleeve, install on a stepped driver in kit and coat with Loctite. then drive sleeve into place. Install a new freeze plug and done. You can remove old plugs with a small hole drilled and use a screw and small slide hammer to remove them.

[chessie4905]

I've  done this on two of mine. A 6.5 to and a 6.2 with Banks turbo kit. Both did a fair amount of towing and were "performance enhanced". Never had and head gasket or bubbles in coolant leaks.

[s2mikon]

I don't know about the crankshafts, but when my 6.2 1985 c-30's speedometer broke the dealer replaced it with a calendar.