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son was working on my 92f150 and replaced the oil pump. He left the pan off for 6 months.Am I going to have to replace the engine because it set with no oil in very damp floridian weather for this long? Engine was not pulled and it has not been cranked. Is there some precaution I can take to insure this engine does not lock up when it is cranked? Not going to try to start it till I get an answer. This is a 300 inline 6 with 120k.BTW son is not going to touch another one of my vehicles since he is soooooooo slow. Any information will be greatly appreciated.
What I would do is crawl underneath the truck and look for obvious signs of rust. If you don't find any, replace the pan.
Fill the crankcase with oil, prime the oil system, and slowly turn the engine over by hand. If everything feels ok, start it up and hope for the best. Should be ok. Good luck.
After looking it over you can attempt to turn the engine over slowly with a breaker bar to see if it is locked up. If it turns a quarter turn or so, all should be fine. I would then put the pan back on, pull the plugs so it will turn over real easy and crank it a few dozen turns to get some oil circulating. Put the plugs back in and it should be OK.
I doubt if you have more that some surface rust. I would change the oil and filter after a couple of hundred miles, however.
While the plugs are out , pour an ounce or so of oil in each cylinder , & rotate the engine by hand , It may smoke a little on start up but that should disappear shortly .
BEFORE YOU PULL THE SPARKPLUG WIRES OFF...if you don't know about the firing order of your engine, use masking tape and a
blu/blk pen and lable each wire numericly 1,2,3,4,5,6. To make it easy for you, call the one closest to the fan #1. Follow back to #6 as being the last one in line, or closest to the cab.
Otherwise you're gonna have a bad day.
A word of caution of cranking the engine with the plugs out. Before you crank the engine with the starter make sure you ground the plug wires. These high energy ignitions sometimes will build up a charge and fry some of the electronic ignition components. I don't know if Fords do, but its better to be safe than sorry. I suggest inserting the plugs back onto the wires and wrapping the plug threads with bare copper wire, which can be wrapped arond a good ground. After that just crank away.
I crank the engine over with a swtich that jumpers the starter solenoid so I don't have the ignition key on. I also pull the second wire off the solenoid which goes to the igition on those models that have the second wire.
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