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Old 09-07-2009, 08:09 PM   #1
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Engine Locked Up?

Ok, my cousin just picked up a 2000 Jeep Wrangler with a 2.5 motor. The previous owner thought the engine may have locked up. Neither one of us are mechanics, so, what is the easiest way to see if the engine "is" locked up? He was thinking of getting a battery and trying to turn it over, but, is there another way that he could tell without buying a battery now. I was going to try and turn the engine over by grabbing the fan, but, wasn't sure if that was still the right way to try.
Thanks for your help.
Chuck

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Old 09-07-2009, 09:01 PM   #2
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If its manual,put it in gear at the top of a hill put the clutch in and start rolling down then let go of the clutch. I would do this in third if you have a 5 speed or 4th if you have a 6 speed while the key is in the run position. This would loosen up the engine

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Old 09-07-2009, 09:23 PM   #3
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turning the fan won't do anything, it will turn without the engine moving.

you can also put a socket and big ratchet on the front of the crankshaft and try to turn that clockwise.
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Old 09-07-2009, 10:54 PM   #4
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Quote:
Originally Posted by 93yjsplash View Post
If its manual,put it in gear at the top of a hill put the clutch in and start rolling down then let go of the clutch. I would do this in third if you have a 5 speed or 4th if you have a 6 speed while the key is in the run position. This would loosen up the engine
So, having him change the oil and filter and putting an old battery in it would probably be a good idea first, correct? Then try and see if we can break it loose by either pull starting it, or, pushing it down a hill? To, me that sounds like a great idea, I never for a second thought of pull or pushing it to break loose the engine. That is why I love this forum. Keep the good ideas coming.
Thanks
Chuck
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Old 09-07-2009, 10:58 PM   #5
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Quote:
Originally Posted by jpdocdave View Post
turning the fan won't do anything, it will turn without the engine moving.

you can also put a socket and big ratchet on the front of the crankshaft and try to turn that clockwise.
Would you happen to know what size the socket is for the crankshaft so that I may have it ready to try this week? Never thought about the clutch on the new engines fans. I was thinking of the old 351cj in my Mustang.
Thanks,
Chuck
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Old 09-08-2009, 08:02 AM   #6
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Originally Posted by jamesdeanblvd View Post
So, having him change the oil and filter and putting an old battery in it would probably be a good idea first, correct? Then try and see if we can break it loose by either pull starting it, or, pushing it down a hill? To, me that sounds like a great idea, I never for a second thought of pull or pushing it to break loose the engine. That is why I love this forum. Keep the good ideas coming.
Thanks
Chuck
exactly and if you have fuel going to the rail then it should start up but more than likely there would be no fuel because the fuel pump would be off and the pump would be off cause theres no power :P
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Old 09-08-2009, 04:50 PM   #7
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I'd pull all the plugs and try turning the engine by the dampner bolt on the crank first.

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