Seized engine

Ok, here's the problem. The Chrysler 6cyl flathead in my Clarktor is seized. I've removed the sparkplugs and put kero/diesel in the cylinders.
Cannot budge it and as I believe it has a fluid coupling, towing seems to be out of the question.
Ideas, please? Thanks.

Here is the fluid coupling story

www.allpar.com/mopar/fluidrive.html

As for the seized engine, I think you should leave it for a few days brewing. If that does not work there is nothing for it but to remove the head and gently whack each piston with a block of wood.

Great. Found this embedded in there;
"You can push start a Fluid Drive vehicle using 2nd gear in the three and four speeds and 2nd gear low range in the wait and clunk, starting with the clutch depressed at about 15 mph ease the clutch out. If you start with the clutch out you need to reach 20-25 mph before the oil in the fluid drive has enough oomph to spin the engine."

Hi I have unseized several engines by putting diesel down the bores and letting sit for a few weeks and then removing the starter and levering on the ring gear with a suitable bar if you have room but it can take a while. However it depends on why it's seized to begin with. If it has grabbed a piston you may have no luck but if it has seized because of sitting you might be right.

I have taken the starter out but am hesitant to lever the ring gear. I've seen a few of them chipped so maybe the metal is not that strong. having said that, I may try a little pressure.

As for the seized engine, I think you should leave it for a few days brewing .

I'd second this, Patience will be your greatest asset in jobs like this..

I'd even leave it soaking a week or 2..

Have heard of making up Adapters for grease nipple , , pumping with a high pressure grease gun .

I have two spare engines if you can bear the pain of picking them up from WA

A couple of old fellas I know swear by brown vinegar
Has to be brown. Put it in the pots over night and it should be free by morning. Use the ring gear to lever it.

Have heard of making up Adapters for grease nipple , , pumping with a high pressure grease gun .

This can work but should be used as a last resort because you could crack a piston crown, especially on aluminium pistons. Some hand operated grease guns can develop pressures up to 10 000psi.

A couple of old fellas I know swear by brown vinegar
Has to be brown. Put it in the pots over night and it should be free by morning. Use the ring gear to lever it.

And be cautious with anything acidic as it can strip any metallic surface coatings on pistons, rings and valves.

I've had luck with WD40 liquid, ATF and diesel. Just get it boiling before pouring it in. And another trick to try is weld up a fitting that screws into the spark plug hole and hook it up to a compressor- that way you have 100psi pushing the WD40 down the bore into all the nooks and crannies...