Engine seized!
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Senior User
Joined: Dec 2003
Posts: 330
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From: Newhall,CA
Engine seized!
I was messing with my timing today. i retarded it about 1/8th turn and it wouldn't start. I put it back and then CLUNK! While I was cranking the motor over i hear a clunk, then my motor no longer turns. I got out and tried to crank it with a wrench. I found a remanufactured 390 for about $1200. If I got a non smog motor, would I have to run 91 octane? Theres also a 460 + E4OD in the truck trader for $1900, but that would end up costing more than 3000 from start to finish. I'm really po'd. How much would rebuilding my mill cost? Is there any other thing that would keep my engine from moving? 
Posting Guru
Joined: Jul 2003
Posts: 2,232
Likes: 1
From: Colville, Washington
Check flywheel/flexplate bolts etc. in the bellhousing. Will it turn backwards? A non smog motor will not need premium fuel unless it has been built with more compression.
Hard to give estimates because we don't know the engines condition, but a stock rebuild without major head work will run ~$600, if you need major head work(valves, guides, seats) then ~$1000.
Hard to give estimates because we don't know the engines condition, but a stock rebuild without major head work will run ~$600, if you need major head work(valves, guides, seats) then ~$1000.
Fleet Mechanic
Joined: May 2004
Posts: 1,436
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From: Montana
Check the starter the shaft may have turned in the housing or a loose connection it is possible. The stud can be turned loose while the nut is still on it and it will lose all connection. Hell the starter may be toast from all the trial starting....
Post Fiend
Joined: Jan 2003
Posts: 8,600
Likes: 4
From: Iowa
Check the starter. I thought mine was locked up once, only to find that a starter tooth had broken and wedged itself in between the next tooth and the flywheel. Take off bellhousing dust cover, new napa starter, and it's good to go.
The clunk was probably the starter giving itself a wedgie.
The clunk was probably the starter giving itself a wedgie.
Postmaster
Joined: Jul 2003
Posts: 3,934
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From: iowa
i never thought about it but it makes sense that the starter would be holding up the engine from rotating.
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Fleet Mechanic
Joined: May 2004
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From: Montana
I had to go with that because it was the place I think nobody had looked yet.....lol He said wedgie....
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Posting Guru
Joined: Jul 2003
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From: Eureka, Ca.
If you are getting your starters from Kragen's Definintly get the Autolite starter it is more expensive but worth it. I went through 4 of the cheaper ones before I upgraded. No problems since.
Senior User
Joined: Dec 2003
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ive had starters jam the whole kick out gear in the flywheel and lock a motor up. I wasas upset asyou too.
if you hit the key and it went KLUNK before it even turned over I BET its the starter.
if it was turning over for a few sec and then went klunk, it still mighta broke off and got a wedgie, or something else I cant imagine.
good luck
if you hit the key and it went KLUNK before it even turned over I BET its the starter.
if it was turning over for a few sec and then went klunk, it still mighta broke off and got a wedgie, or something else I cant imagine.
good luck
