Rebuilding a siezed engine.
#43
Hey guys, mind if I chime in? 
From the pictures, it looks like the damage from running this motor dry is going to be limited to the crank. Probably some "welded" rod bearings are why the crank won't turn anymore. I've never seen a case where a motor was run dry and the crank was still useable without at least machining it in one of several ways.
Most of my engine experience is with V8 motors, so I had to re-read when I saw this little 4-banger could be rebuilt to new for under $500. That would probably only cover the price of a new forged crank for a V8 motor.
About the only other bad thing I can think would push the decision making to scrapping this motor is if the deck is pretty badly warped from overheating. Ditto for the head. If both of those spec out ok, then I don't see why this motor couldn't be rebuilt (instead of junking for another).

From the pictures, it looks like the damage from running this motor dry is going to be limited to the crank. Probably some "welded" rod bearings are why the crank won't turn anymore. I've never seen a case where a motor was run dry and the crank was still useable without at least machining it in one of several ways.
Most of my engine experience is with V8 motors, so I had to re-read when I saw this little 4-banger could be rebuilt to new for under $500. That would probably only cover the price of a new forged crank for a V8 motor.

About the only other bad thing I can think would push the decision making to scrapping this motor is if the deck is pretty badly warped from overheating. Ditto for the head. If both of those spec out ok, then I don't see why this motor couldn't be rebuilt (instead of junking for another).
#44
Well, I finally got the block out.. but now my question is what exactly do I take to the machine shop? Do I take just the block in with the crank in tact? Thanks again guys.
#45
Originally Posted by Nix_Toy
Well, I finally got the block out.. but now my question is what exactly do I take to the machine shop? Do I take just the block in with the crank in tact? Thanks again guys.
in my case I just dropped off the block and new pistons and had it back in a couple days...
#47
Originally Posted by 44Runner
everything that needs machining, and the new pistons...
in my case I just dropped off the block and new pistons and had it back in a couple days...
in my case I just dropped off the block and new pistons and had it back in a couple days...
#48
If i was in your shoes id tare it down first in the garage, at this point there is little you can do to hurt it.
That way you can see for yourself what the damange is and get an idea of what might have to be done to fix it. It may be "severe" and not be worth your $$ to get it fixed so you might just start over with a new block.
but i would want to know that on the front end before i took it to the machine shop and started to get the sales pitch from them about "oh na we can do this and that and bla bla bla"
That way you can see for yourself what the damange is and get an idea of what might have to be done to fix it. It may be "severe" and not be worth your $$ to get it fixed so you might just start over with a new block.
but i would want to know that on the front end before i took it to the machine shop and started to get the sales pitch from them about "oh na we can do this and that and bla bla bla"
#49
Originally Posted by Nix_Toy
I thought I'm not supposed to buy new pistons until the machine shop tells me if I need to bore it out or not?
Last edited by MTL_4runner; Jan 23, 2006 at 03:04 PM.
#50
Originally Posted by MTL_4runner
You might want to get a quote on all the machine work because you may come out ahead by buying a used motor and swapping them. Just a thought anyway. From the pics it looks like the crank journals are likely toast but the cylinders don't look too bad so they probably still have compression (just a light hone and some new rings may bring that right back to new (soak the pistons in top end cleaner to get rid of the carbon).
#52
Originally Posted by Nix_Toy
Does anyone know what to ask for?
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I didn't think it was.

