92 explorer engine siezed after synthetic change

[Diabhal]

Okay so a buddy of mine has a 4.0 engine out of an 04 explorer that has 4000 miles on it and he tells me that it will line up perfectly on my 92 explorer can anyone verify this for me? thanks

 

[FIND]

Ok so... first, a little back story... my uncle who passed with cancer about a year ago gave me his truck, and he has had it since I believe 92. I was told that it was kept up with and had the oil changed everytime the sticker date came up. (I cannot prove this because I did not own the truck) he was having problems with overheating and would use hose water to fill the radiator (which is why I flushed the radiator and filled it up with antifreeze) as for the oil filter I looked it up myself at autozone and made sure it was the same size as the previous, however I did not prefill it with oil before I replaced it, I did lube the gasket with the new oil though. The oil was penzoil platinum and was said to break down most engine sludge within the next oil change, I should have read up before jumping headfirst to the synthetic however I didnt. Also the oil filter was just a fram high mileage oil filter, I couldnt give you a part number right now however. I do agree with those of mentioning something about the oil pump, it makes sense and seems to go with the issue, but I have not checked as of yet. Last I heard you have to lift the engine to pull off the oil pan and to check the oil pump, I do not have an engine lift or a mechanic friend to do this so im not sure how to check the oil pump.

start with the things you can do.

Pull plugs, pull valve covers, and drain oil.

Those 3 things could likely tell you everything you need to know.

 

[jg09]

Okay so a buddy of mine has a 4.0 engine out of an 04 explorer that has 4000 miles on it and he tells me that it will line up perfectly on my 92 explorer can anyone verify this for me? thanks

it might bolt up, but it won't work easily. your 94 is obd1, the 04 is obd2. unless your swapping all the electronics over, it won't be just plug and play

 

[huntman58]

I work on the GM 8.2l fuel pinchers all the time, and we switch from synthetic to convetional all the time.. What we do is before we swicth to a snythetic, we do an oil change, to some cheap oil, and add in ATF. Run that for about a day or so, then change again to the syn. Never had an issue at all, and thats on a almost 20 year old engine.

SOO my dad was right about ATF! Only he used it not for prep to use synthetic oil but to clean a motor or to free sticky lifters. Now come to think of it when working on his motors they were not all gunked up and this was back in the late 60 and threw the 70's when oils did not have all the fancy cleaners they do today.

 

[2000StreetRod]

Seized or blocked?

In my opinion the first thing to do is determine if the engine is seized from lack of oil or just blocked from turning over. If it's seized then it doesn't really matter if the oil pump is any good. If a head gasket blew (you said it was prone to overheat) then there could be incompressible coolant blocking a piston. I suggest that you pull the spark plugs and try to manually rotate the crankshaft.

 

[DonDDR]

My friend suggested force turning the crankshaft with a long wrench to move the piston... I mean it couldnt hurt the current situation.

Yeah it will hurt the current situation. You will break the bolt off in the end of the crankshaft.