Originally Posted by Frango100
Was the oil pressure indication faulty before this started?
I would try and put a socket and an extension on the crank pulley nut and see if the crank can be rotated clockwise (standing in front of it) with not too much force. If not, remove all the plugs and try again. I would say that 3 qts low on oil should still leave enough oil for lubrication. No smoke from the exhaust before this started?
Depending on how long it may have run without much oil, and how long it has sat since, might be able to salvage. When trying to turn the crank, don't move it very far, as you don't want to cause further damage.
NOTE: This is an old tactic, best used on antique GM stove bolt 6 engines or old Toyota 4 bangers, where they could run for years afterwards.
Drain the oil, and look for large bits of metal. If a lot, just give up.
Then, fill the oil with a mix of penetrating oil [or kerosene] and STP.
Pop the spark plugs and put about a teaspoon of kerosene/penetrating oil mixed with a few drops of STP in the cylinders and let it set for a few hours.
Then, try the wrench on the crank and see if you can turn it. If you can, keep turning it for several turns, hopefully the resistance will drop.
Then, drain the oil, new filter, and add a good oil brand before you try to crank again.
All you purist mechanics can now go get your Dramamine--but this old method does work--not that I'd do it on my engine except for long enough to drive to a junkyard or crate engine supplier.