seized 460
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New User
Joined: Dec 2009
Posts: 22
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From: Alaska
seized 460
hi guys, i just picked up a 77 f250 supercab with a 460 that was supposedly running until 2 weeks ago when the guy i bought it from drove it home and parked it. when he went to drive it 2 days later it wouldnt crank over, you cant even bar it over by hand, any ideas? according to him it wasnt running hot or making any unusual noise, and i checked the oil and it looks fine, and the coolant level is good.
Post Fiend
Joined: Mar 2004
Posts: 6,056
Likes: 8
From: Union, Washington
Pull all the spark plugs and then try cranking the motor. If it is hydraulic lock whichever cylinder(s) it is will be the one blowing liquid out of them. If the motor still doesn't turn over, the guy is lying to you, he broke the motor and knows it.
Tuned
Joined: Mar 2010
Posts: 491
Likes: 7
True. Should be a ~10 minute job to get it off, and is a good place to start checking.
If it is the starter that came apart and is jamming up the flywheel, how would you get it out without destroying either the flywheel or the bellhousing? Just attempt to spin it the opposite direction of the jam, then try to fish it out with a magnet?
~B
If it is the starter that came apart and is jamming up the flywheel, how would you get it out without destroying either the flywheel or the bellhousing? Just attempt to spin it the opposite direction of the jam, then try to fish it out with a magnet?
~B
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Tuned
Joined: Jul 2006
Posts: 284
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From: Clover, SC
I have seen this very thing...several times....and each time it was on a Ford with a remote-located solenoid type starter. I'm betting this is exactly what's happened here.
Laughing Gas
Joined: Nov 2003
Posts: 898
Likes: 1
From: southeren Oh
could be starter,... or the bottom could be toast.
I have seen an engine that had been hydrolcoked bend one rod enough that the piston came down far enough that the crank counter weight hit the piston and locked the engine.
1 new rod and piston and it was running again.
I have seen an engine that had been hydrolcoked bend one rod enough that the piston came down far enough that the crank counter weight hit the piston and locked the engine.
1 new rod and piston and it was running again.
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New User
Joined: Dec 2009
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From: Alaska
thats exactly what happened, blown head gasket hydrolocked #8 and bent the rod so much it hit the crank, got it all back together but now i have another issue. it starts up with good oil pressure, around 50 but when its warm it drops to around 7.
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New User
Joined: Dec 2009
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From: Alaska
i didnt take the time to plastigage the clearances, but i did replace all the main and rod bearings. both i and the machinist i got the rod from came to the conclusion that the old bearings were standard as we couldnt find any markings otherwise and they were stamped ford. the only thing i can think of that i might have a problem with is the fact i couldnt find a parts store with a oil pump gasket in stock so i used a light coat of rtv instead, could it be blowing by that once it warms up?