you probably got a cracked head
Pressure test the convertor.
Needs a new head gasket, and maybe heads and pistons.
I think you dont have to drive the car right now because the cooling system might be the probleme causing the engine to be overheated and slow down the combution , i think u should check the radiator
Need more info, such as engine size, etc.; but, it sounds like the engine siezed.
i have a 3406b inframed new head injectors runs rough and pours white smoke had pump and timeing advance off timeing advance rebuilt put back on. now its worse
Oil yes. Sludge from overheating maybe not. Might be able to run some engine oil flush through the oil system and see if it cleans it out. Don't drive the car with it in the engine and change the oil twice after you drain it all out to be sure you get all of the kerosene out. Otherwise, you will end up with a locked up, overheated engine.
If the car overheated, you may have warped the aluminum head. You may have to have the head shaved and a new head gasket put in.
Your engine overheated for whatever reason.
Run a compression test. If compression is down in several cylinders you've probably warped a head. That's a common problem after an engine has overheated, that's why it's so essential that you NEVER allow an engine to run out of coolant, and you should watch the temperature indicator. If an engine dies from being overheated you've probably blown a head gasket.
I think a "top overhaul" will do. They will just change a gasket which prevents the oil from leaking into the water.
dhooma shakata nilayamu (in olden days when engine runs on coal) vidyutshakata nilayamu (now a days where engine runs using electricity)
If it won't even turn over, then I would suspect your nonstock engine got severely overheated and warped or welded something important. Engine's gotta come out. If it turns over slowly, maybe the battery got run down because the alternator wasn't turning and therefore not charging.