Case 730 Engine Seized

[James Bodeis]

After sitting all winter I tried to start my 730 diesel and it will not spin over. Starter engages but cant turn the motor. I drained the oil and there was a fair amount of antifreeze at the bottom of the pan. Im thinking a head may have cracked? Any idea if i can free this thing up or am i looking at a major? Thanks for any help.
 

[Hayrack]

Could be a cracked head or a blown head gasket. I would pull the injectors and then see if it spins. It could have a cylinder full of antifreeze.
 

[James Bodeis]

OK. I have never worked on one of these. how much of a job is it to pull the injectors?
 

[Hayrack]

Its not too bad a job, but not something I would tackle if you don't have the manual or someone experienced to help. From the sound of things, I would bet that your going to at least end up pulling the heads..
 

[jon f mn]

Pulling an injector is not hard on those. Pull the feed and retrurn lines and the 2 nuts that hold them in and they should pry out without too much force. If one is tough it's probly rusty and your problem cylinder.
 

[Hayrack]

Thanks for chiming in Jon... I was hoping someone with a little more experience than me would add their 2 cents...
 

[James Bodeis]

how do you get the return lines off without bending them all to heck? I will be replacing at least one of the tubing nuts after a little frustration got the better of me. Also what is the best way to pry on the injector? i tried getting behind it with a screwdriver but wasnt getting much leverage.
 

[jon f mn]

I've never found a way without bending them at least little, but it's better if you take them all off from the end and work to the other end. You can turn the T's and then only have to bend them a little. Others with more experience than me may have a better plan tho. I have a bar like the center one in the link that I use. If they are stuck sometimes tapping on them with a small hammer while prying will break them loose. Have you tried to turn it over with a pry bar on the ring gear? I would start there to see if it's actually stuck. If you can't turn it either way, then you know it's stuck and the pan and heads have to come off anyway.
 

[jon f mn]

Forgot the link.
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