I got mineral spirits in my crankcase.
Don't ask how because I'm not telling you. Keep in mind that I don't drink either.
Anyways I just got it back together and in the car. I ran it for about 5 minutes and noticed about 20 pounds of oil pressure where there used to be 80. I checked the oil and it was more like foam. I changed it three times so far and I don't have the pressure I want.
I looked in the bottom of the drain pan and I see a greasy substance in there that must be broken down oil and solvent. But solvent won't cut it either. Are my galleys full of this crap and will it ever be normal without taking it down again and tanking the block?
Is there any type of additive that will clean the galleys?

Mineral spirits is a great way to loosen crud,but I don't understand what your trying to say. The foaming sounds like a way overfilled crankcase or loose pickup tube and either would cause a low oil pressure condition. Got any more info?

Yes, the oil is too thin from the solvent. The solvent mixed with the oil has formed a greasy substance. I'm just looking for a way to clean the block out. I am going to assume the lifters are goners so I plan to replace them tomorrow.

So the mineral spirits were put in a very sludged engine,now the pickup has been plugged and your oil pressure is low? Drop the pan and clean it out as well as the pickup tube and pump. Disassemble the lifters(IF NEEDED) and clean them out. Add fresh oil and go.

I can't imagine that a couple oil changes wouldn't result in nothing but OIL in the engine!!!

Well assuming it's some kind of beater,I'd fill the crankcase with 2 quarts cheap 30wt,at least 2 quarts MEK,toluene,mineral spirits mix and let it run at low rpm 45 minutes,then drain,repeat as needed until clean. Thats the easy way to deal with it.

No it's not some kind of a beater. It's a fresh 340 right off the stand. I just got solvent in the crankcase somehow and it thinned the oil. I am on oil change #5 and still can't get all the solvent out. The lifters are rattling to beat the band since they've all filled up with this thinned out oil.
The oil in the bottom of the drain pan has the consistency of crisco and I assume there is some of the same stuff in the galleys.
I was just looking for a way to clean it out without another teardown.

I don't think the problem is the mineral spirits,something is way wrong. Sorry,I'd pull the intake and check the cam lobes. Even if you had some trace amounts it wouldn't have any effect after an oil change,5 changes later,you got a problem.

Are you checking the used oil for metal flakes? How are you finding this "glue",does it drip out of the drain plug or? What assembly lube(s) did you use?

An hour and a half, and the engine is out, another hour to take it down. Wash the block, check your cylinder walls for pattern, re-assemble with new bearings and rings and lifters and oil pump. Break-in again...yada...yada...
Call it a $200 mistake

And whatever you did
don't do it again!

curious how a fresh off the stand engine could have that much sludge/[Edited by Moparts - Keep it clean] built up in it...

and now

waiting for the rest of the story !!!!

I agree with 440sixpack

When I was much younger I decided to flush my 440 with a solvent, kereosene i think, ran engine ww/5 qts of kerosene about 5 minutes, drained it and filled w/ oil & new filter. NO PROBLEMS.
However I dont think I would ever try that again.
The solvent Is not your problem

Or coolant?

I'm going to have to get everybody's address and send them a sample. This is not foam from aeration there are no metal shavings either. This is not "Sludge" from cheap oil or infrequent changes. This is a greasy substance caused by whipping oil and solvent together in the pump. The oil has been broken down and and the greasy residue is adhering to the insides of the galleys and lifters just like it sticks to the bottom of the drain pan.
I did another change today while hot and I am making progress. The oil is better when it comes out and I am getting my pressure back little by little.
A lot of the pressure issue was the line going to the guage was plugged wuth this stuff too.
I was just looking for an easy way to clean the engine out.
If this still isn't clear as to what I am talking about, go pour a half cup of mineral spirits in your crankcase and let it run for about 10 minutes.

Does it have the look of a partialy melted milkshake? Maybe it's a condensation issue,not that uncommon.

are you running a synthetic oil?? maybe running some ATF will help cut the slime/goo substance...