Start up of 'unknown condition' motor

[Oberstar]

I have a D24 motor in my 43 Dodge WC52; a replacement for the T-214 that was originally placed in it.  My question is "what are the details that I should consider when starting and running this motor"?  I ensured the cylinders were not totally dry, replaced the radiator hoses, and have had the radiator pressure tested.  The motor hasn't ran for decades, but with a fresh battery, plugs and basic wiring circuit, she fire right up!  I did an initial compression check, and it showed a difference in psi of about 30 as an average; 70 in one cylinder, 100 in another- oil pressure at about 50psi.  After searching the forums, I see where I shouldn't put too much faith in numbers until the motor has been broken in again, and just plain run.  For now, I plan on letting it idle, get to operating temp, and then taking compression and oil pressure readings again.  For now, I get a lot of blue smoke from the tail pipe, but that could just be from sitting for sooooo long.

 

Anything else I should consider before deciding on a rebuild or not?  I have the entire cab, bed, wheels, and front clip off, so now is the time to pull it if need be.

[Niel Hoback]

 It's probably smoking because the rings are  stuck from sitting so long.

I would run it at about 1500 RPM rather than at idle for 10-15 minutes to help clean out the ring grooves and oil passages. A quart of Marvel Mystery oil would help.

Watch the temperature closely, while its running and keep an ear on it for odd noises. 

[knuckleharley]

I wouldn't even consider a rebuild until I had driven it at least 1,000 miles and given the rings and cylinders a chance to mate again.

 

Generally speaking,if you start one up that holds 50 PSI of oil pressure and you aren't hearing any rude noises,you have nothing to worry about.

[Oberstar]

Thanks, guys!

[blucarsdn]

I have had a lot of experience with engines that have sat without use for extended periods of time. I usually pull all of the plugs, check to see if the engine can be turned over by hand, if it will turn over, counter and clockwise, I will fill each cylinder with Marvel Mystery Oil, I then let the engine sit for several days, maybe weeks. After the resting period I pull the plugs, disconnect the coil wire and crank the engine over, this will be messy! I then drain the oil from the crank case and install new oil.. I let the engine sit for a few days, cranking it over once in awhile. After a reasonable waiting period I install the plugs and attempt to start the engine. I have had very good luck with engines that have sat for over forty years.
I generally put MMO in the cylinders of engines that I don't intend to run for an extended period of time. I realize that you have already started your engine, however, putting some MMO in the cylinders and letting it sit for a few days might be of benefit to the engine.  Bill