Just bought my first M923, engine seized

[Rummels Automotive]

Just purchased my first 1984 M923. Driving it home, engine suddenly started running hot and seized! Need some help, what do I do? Guy gave me my money back and told me to keep the truck. I have $1800 to spend to fix it, suggestions?

 

[sd39u]

Sounds like my truck!

Could be:
Bad order thermostat.
Bad order head gasket.
Or you could have welded the pistons to the cylinder liner.
Could be a hydro locked cylinder

Read my post a few posts down...some good advice in there.

Eric

 

[FloridaAKM]

You got your money back & kept the truck, what good luck on your part! Welcome to the Green Iron Disease. There will be more knowledgeable folks along to help you with your engine problem.....

 

[Warthog]

With the $1800 I would buy a good take out engine and be done with it.

 

[Rummels Automotive]

Not a bad deal, I was just not wanting another engine project but I got one anyway! I think that I have a scorched liner. Just talked to my godfather (a diesel mechanic) sounds like the bottom end of those motors are pretty tough. I'll know when I drop the pan. Hoping I can do a in frame overhaul. I'll keep you updated.

 

[Rummels Automotive]

Any ideas as to where to find a take out?

 

[Warthog]

depending on what model of truck you have, it is either a Cummin's NHC250 or the 6CT8.3L.

Just a straight M923 should have the NHC250.

Some members have takes outs. Or any of the big vendors. Eastern Surplus, White Owl, TJ Murry, Memphis Equipment, etc will also have them.

Post a Want Ad and see whats out there.

http://www.steelsoldiers.com/forumdisplay.php?130-Parts-wanted

 

[Iowadog]

I had the same thing happen to my 923. It was caused by a bad radiator. I ended up with an in frame overhaul and had the radiator rebuilt. So be safe and check out the radiator before firing up another engine!

 

[wrenchturner6238]

There is a guy here that is selling Cylinder kits. He has made a for sale thread I seen the other day.

 

[lindsey97]

I know a guy in Virginia that has a complete engine for sale. I bought parts from him on SS. PM me if you want his info.

 

[Ford Mechanic]

I had the same thing happen to my 923. It was caused by a bad radiator. I ended up with an in frame overhaul and had the radiator rebuilt. So be safe and check out the radiator before firing up another engine!

Well did you put the radiator in time out?

What was wrong with the radiator? Clogged, leaking? Did it not show running hot?

 

[Rummels Automotive]

Thanks for all the info guys. I'm hoping to drop the pan today. If the bottom end looks OK I'll probably stick with an in frame. The engine only has just over 600 hrs on it. Every drop of water we added to it yesterday wound up in the pan.

 

[Plane Fast]

I would guess your going to find part of a liner in your oil pan. (Maybe more)
Good luck. That's still a great deal.

 

[Sephirothq]

I will sell you a good running engine for $1000 you have to pick it up in Pa. I also have a good radiator if you need one as well.

 

[Sephirothq]

You will find rebuilding your costs more then replacing the engine.

 

[Ray70]

WOW! a free 5 Ton, even with a bad motor you still scored big! I bet there are more than a few who paid decent money and also got a bad motor!
Good luck , and welcome to SS.

 

[turnkey]

The good . The bad. and The expensive......sounds like a good trade off...just have to see how bad it is....best of luck on this one.

 

[Rummels Automotive]

Bad part is I was looking at the engine data tag and found the engine was manufactured 12/06! So the engine isn't even that old. The good news is, I went out today and she cranks over. Think a head gasket blew, hydrolocked the motor (may have even cracked a sleeve), after the engine sat all night the water passed the piston and into the crankcase and allowed the engine to turnover. Fingers crossed!

 

[elkhtr]

Pretty sure they weren't making NHC 250's in 06.
Post a picture of the tag if you can, maybee an overhaul tag?

 

[Rummels Automotive]