Is it possible to free up a frozen 300d that froze after an oil line broke?

if it froze its got bigtime problems that will need taken care of.........cheaper to find a good used engien and swap.

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Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
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Section 609 MVAC Certified
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"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

More details required but if you lost your oil supply and the engine froze as a result it's pretty well game over for that engine. Bonehead is right. Because of the oil cooler lines and hoses to the cooler plus the turbo line and other reasons I have always thought we should add an aftermarket low oil pressure warning sensor and buzzer to these cars. Really not hard at all to engineer and install.

NO!

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Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John

or you can rebuild it. close examination of the engine is warrented though. it is possible to sieze the cam and not the bottom end. in this case the bottom end might be in better condition than if it were siezed as well.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

This is a tricky one. It is possible that you could fix the oil line, refill with oil and the engine would run OK but this is a long shot. Most likely there is internal damage and scoring of the pistons. But what the heck, why not try it? What do you have to lose?

If it seized because it overheated you can just let it cool, but regardless the engine won't be the same.

Possible, yes. The answer to the follow-up question "Is it affordable?" is "Maybe, depending on how many internal parts need to be replaced." All of the posts above have outlined what may have gone wrong.

Best Regards,
Jim