I have a car engine that has not been cranked in 6 months. I can turn the crankshaft 3/4 turn manually.?

Question:
Then it stops. Is there a special lube I can put in the spark plug holes to break up the supposed ring of rust that is stopping it?

Answers:

1978 Massey Ferguson 590 wont start help wanted?

Sounds like you need to submit some Magic Mystery Oil (Get it at NAPA) in to each spark plug hole and I mean a lot. Crank it back and fourth for about 5 minutes then add some more MMO and let it set over night. I should turn over with out sticking in the morning.Then you should be okay.

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The fan in my Jeep will only work on high?

Zep 45 penatrating lubricant.

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What is causing the grinding noise when I try to start my car?

use pb blaster in spark plug hole let it sit for a day then try hand turning it again,maybe even backwards,it shouldnt be rusted after only 6 months try cranking it w/plugs out first

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WHERE can you buy ELBOW-GREASE?

are all of the spark plugs out cause if not the compression might be building up keeping you from turning the shaft by hand

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Do some SUV's require to have their oil changed sooner than 3,000 miles?

Put some engine oil, or transmission fluid into each cylinder. Engine oil will work well. Trans fluid has more detergents in it it would be your best choice. I would not recommend putting any other non automotive junk in it.

what could be the problem?

Put a table spoon, or little more oil / trans fluid in each plug hole let it sit for a couple of hours. Put a little more in when you get back and try to crank the engine over by hand.

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How do I replace a flexplate, flexiplate?

Number all spark plug wires as to position,Some cars are numbered.#2 Remove all spark plugs,#3 fill all cylinders with diesel oil,#4 with plugs removed and wires # wait 24 hrs and turn eng by hand,then if Eng turns ok,Install plugs and wires,you will
need to replace fuel filter.

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can an automatic car wash deluxe wash (under car wash) damage optispark distributer in a Lt1 94 trans am?

If rust is stopping your engine turning you are in trouble but I think it unlikely to be the case. Much more likely you have a valve stuck open or one or more cylinders has filled with water causing a hydraulic lock. Pull the valve cover(s), remove the plugs and try again. If you dont know what to look for get a mechanic to do this. There are no magiic potions to fix modern engines - beware the snake oil salesman!.

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My exhaust is making noise...what could it be?

I'll bet it's been sitting for 6 months because the damage is done.

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