Raulporkuu

dump a bunch of oil in it get a breaker bar and roll it over by hand it should free up and run might run like sh&*, might have a bearing knock but running none the less.....

 

samblaze

Yea I hear you on that...

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86 Saab 900S Coupe 5MT
94 Acura Legend GS 6MT
04 Subaru Forester XS A/T

-=DBS=-

yeah.. gotta love the manual!! makes the car that much more fun to drive around... but then some would debate if you get stuck in traffic it's a pain.. I just say if you got your tunes going, that's all that matters..

stock legend

hell yeah! never let go of your legend!!

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--CAI with AEM dry flow filter--
------AEM bypass valve-------

stephen

Depends on what happened. Two common reasons for an engine to seize are 1) low oil pressure so a bearing welds to the crankshaft
2) a piston seizes in a bore

Either way it is unlikely you will be able to turn the engine even with a breaker bar.

The following shows the process of fixing a seized V6 engine from a Mustang

swalch - Photobucket - Video and Image Hosting

I had to loosen all the bearing caps then the engine would turn and could be disassembled. The main damage was a spun rod bearing that had welded to the crank. The engine was totally salvageable but the welded bearing shell had to be removed with careful use of a hammer and chisel, then the crank was ground 10/10.

The rod with the spun bearing had gotten very hot which also overheated that piston and scuffed the bore, so the engine also needed a rebore and new pistons.

An additional issue on an overhead cam engine is the condition of the cam bearings. If the damage is minor they can be repaired by align honing.

bfarrell01

So I suppose what you're saying is that I should take off the oil pan and check the crank?

stephen

You need to remove the engine from the car to disassemble it and check it out.

However, if you remove the oil pan with the engine in the car, a bearing failure might be obvious. If the damage was severe, the melted bearing will look like spilled solder in the oil pan. There is a main bearing saddle that would probably have to be dropped down to see the damage.