460 engine siezed??
New User
Joined: Mar 2002
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From: tucson usa
460 engine siezed??
I have a 1990 Minnie Winnie motor home, have not started for about four months, was getting ready to go camping next weekend, and of course the battery was dead, bought new battery, still would not crank, pulled starter off and had checked at parts store seems to work just fine, so bought new starter solenoid, still would not turn over the engine, so got my longest 20 inch screwdriver and tried to manually turn over the engine, seems to be siezed, how hard is a 460 to turn over, it has only 58,000 miles, has never gotten hot since I owned it, allways runs great, oil is fresh, anti-freeze is good, no leaks that I know of.
What do I do now?
What do I do now?
Senior User
Joined: Feb 2002
Posts: 258
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From: Allegan Michigan
460 engine siezed??
Ok if the truck has been sitting there is no compression in the cylinders so it should turn over fairly easy. I am assuming that you tried to turn it over at the flywheel with the screwdriver. That should be no problem. It sounds like it is froze up. Some might correct me if I am wrong but I would pull the plugs and spray a lot of penetrating oil into the cylinders and let it set for a day or so. Then try to turn it over by hand or in very short bursts with the starter. I am thinking that the rings are seized to the cylinder walls and if you are lucky you can free it up without any damage. If that doesn't work then I would start thinking about the bearings.
Good luck and let us know what you find out.
Good luck and let us know what you find out.
Junior User
Joined: Dec 2001
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460 engine siezed??
We are going to assume here that you have parked the vehicle with proper coolant in the cooling system, like antifreeze, you have not moved from the South to the Northern parts of the world and left your water in the cooling system, possible broken cylinder bore, check water level in radiator, pull oil plug out a quick shot and see if water or antifreeze comes out first, We assume you can not move the crankshaft in either direction even alittle bit?, pull sparkplugs and look for rust spots on a sparkplug(s), I agree with Cybrbyrd, spray alot of nut buster down each sparkplug hole and let it set for a day or two, then try to move crankshaft by screwdriver either way first, possible also something is bound at frontend of engine under a belt pulley combination, air pump, alternator, ect. locked up. Just some ideas, Electric1
New User
Joined: Mar 2002
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From: acton usa
460 engine siezed??
I would pull the plugs and try spinning it over. It's possible some fluid got into a cylinder and you have hydraulic lock. What area of the country are you in? What happens when you try and crank it? Do you hear the starter engage or does it not even get that far?
jim
jim
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Joined: Mar 2002
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From: tucson usa
460 engine siezed??
I live in Tucson, AZ
The anti-freeze is good, oil is good, pulled all but #1 plug, could not get to it without tearing fender out #$%#$ I put some diesel oil in 7 cylinders at noon yesterday, will try turning it over tonight, then again tommorro night. Will also slack up the old serpentine and check the accessories. Thanks for the help troubleshooting this mess.
The anti-freeze is good, oil is good, pulled all but #1 plug, could not get to it without tearing fender out #$%#$ I put some diesel oil in 7 cylinders at noon yesterday, will try turning it over tonight, then again tommorro night. Will also slack up the old serpentine and check the accessories. Thanks for the help troubleshooting this mess.
New User
Joined: Mar 2002
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From: tucson usa
460 engine siezed??
Just another update,
I drained a quart of oil, no water,
checked antifreeze, no oil, up to top, so does not appear to be leaking...
Took transmission out of park to neutral, let roll forward, motor still siezed, so I am assuming the trany is not stopping the engine from turning over.
I took my torque wrench down the street and turned a similar motor home with same engine, only 20 ft/lbs to turn over engine,
I bent my 1/2 torque wrench on my crank with well over 250 ft/lbs.
I loosened up the belts, all accessories turn freely.
I guess the only thing left to do is start pulling the engine out and tearing it down?
Unless anyone has any other ideas?
I am all ears...
I drained a quart of oil, no water,
checked antifreeze, no oil, up to top, so does not appear to be leaking...
Took transmission out of park to neutral, let roll forward, motor still siezed, so I am assuming the trany is not stopping the engine from turning over.
I took my torque wrench down the street and turned a similar motor home with same engine, only 20 ft/lbs to turn over engine,
I bent my 1/2 torque wrench on my crank with well over 250 ft/lbs.
I loosened up the belts, all accessories turn freely.
I guess the only thing left to do is start pulling the engine out and tearing it down?
Unless anyone has any other ideas?
I am all ears...
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Posting Guru
Joined: Feb 2001
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From: Keweenaw Bay, MI
460 engine siezed??
I had the same problem with a MoPar 440 in a Winnebago, and I unhooked all the accessories from the starter solenoid, and t
hooked two 12 volt batteries in series and hit it with 24 volts. It spun over right away! It had been sitting for only nine months or so.
hooked two 12 volt batteries in series and hit it with 24 volts. It spun over right away! It had been sitting for only nine months or so.
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New User
Joined: Mar 2002
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From: acton usa
460 engine siezed??
>I guess the only thing left to do is start pulling the
>engine out and tearing it down?
>
>Unless anyone has any other ideas?
>I am all ears...
Is it possible the starter is engaged and preventing turning? Grasping here I know..
I like the idea of hitting it with 24 volts. A last option before teardown, but if it works...
jim
Junior User
Joined: Dec 2001
Posts: 89
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460 engine siezed??
Things are not looking to good here Arizona man, I never heard of the 24 volt trick before, the impact very well might break it loose, be careful though 24 volts frys 12 volt stuff real quick, this motorhome wouldn't by chance have enough room underneath to drop the oil pan off of it with the engine still in the motorhome? You were talking about placing the transmission in nueutral and rolling the home, you just checked the locking part of the transmission and not the primary input, the problem could be in the transmission still, transmission pump locked up, but you can't even check that unless you can rotate the engine to see if the torque converter rotates back and forth, being the converter is hooked into the transmission pump and bolted to the engine ringgear. Might be best to drop driveshaft and move transmission back a couple of inches off the engine and see which one is the culprit, remember though, torque converter in your situation is going to stay hooked to the ringgear. Just trying to help. Electric1
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Joined: Jun 2011
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siezure
My 1993 ford F-350 with the 460 EOD all of the sudden seeemed like it was siezed. I kept trying to start it and finally with a lot of racket it broke loose. There has been noise coming from the torque converter for some time so I think mine is that(torque converter broken fin )or transmission pump. I am still driving it just waiting for the other shoe to drop. has anyone else had these problems?
I have seen plenty of posts for odd noises from the front of the transmission.,
steve
I have seen plenty of posts for odd noises from the front of the transmission.,
steve
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Joined: May 2010
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From: Central Indiana
Classic necro-post. On another forum I belong to, mods just delete the necros.
Necro-post or necropost. Noun "To post in a dead or old thread, one that is obviously gone and forgotten." Almost always done by a n00b (newbie or new person) to a forum that does not know or care to follow the particular posting etiquette of said forum. Also see necroposter, zombieposting.
I was just modding a board last night with too many necros by a n00b. Got it cleaned up, he came back and necro'd some more.
Okay, before someone says something, I don't think necro'd is a word. I just can't come up with something else to put there. My pinky finger is still throbbing from having surgery recently and I can't think clearly at the moment.
Necro-post or necropost. Noun "To post in a dead or old thread, one that is obviously gone and forgotten." Almost always done by a n00b (newbie or new person) to a forum that does not know or care to follow the particular posting etiquette of said forum. Also see necroposter, zombieposting.
I was just modding a board last night with too many necros by a n00b. Got it cleaned up, he came back and necro'd some more.
Okay, before someone says something, I don't think necro'd is a word. I just can't come up with something else to put there. My pinky finger is still throbbing from having surgery recently and I can't think clearly at the moment.
Last edited by raystankewitz; Jun 24, 2011 at 09:28 AM. Reason: Stuff. I think. And typo's galore.
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