I hate to ask stupid questions, but....

[chevblazk5]

I just got an '85 C30 with 6.2 diesel. The motor is out of a different truck and only god knows how many miles are on this thing. The truck starts up easily with very little black smoke. I want to pull the 6.2 out for my '90 Suburban and here's what I want to know:
What should I do to the motor before I do the swap? I was planning on changing the head gasket, swap the timing chain for gears and I already have new glow plugs from Kennedy diesel. Is there anything else that I should do? I do have a new banks turbo kit, but that's gonna have to wait as I'd like to take care of the rust before it's too late.

 

[azblazor]

I would first compression test it. Then pull your injectors and have them tested, some shops will do it for free.

I would replace the vibration dampner, rear main seal, front timing cover/crank seal, oil pan gasket, valve cover gaskets, put a new high flow water pump on it from penisular diesel and I would also go with the dual thermostat crossover.

 

[jarheadk5]

What does the dual-stat crossover do for the motor?

 

[azblazor]

It flows a lot more coolant. It is a factory upgrade in 97 that can be retrofitted back to the 6.2's. You just need to cut and rotate the outlet (t-stat cover) and reweld it and notch out the throttle bracket.

 

[chevblazk5]

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I would first compression test it.

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That's the first thing I'm doing this Sunday and I'll go from there. I just found out that the motor has almost115,000 miles.