Builds 1987 fj60 12h-t h55f conversion

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Finally some parts trickling in

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Doing it right this time, nice! Are you just rebuilding the head and re-sealing the block?
 
Doing it right this time, nice! Are you just rebuilding the head and re-sealing the block?

Hey hey! It was right the first time! but, inevitably there is no way to foresee a bottom end failure sometimes so, this time around I decided to open it all the way up.
 
Hey hey! It was right the first time! but, inevitably there is no way to foresee a bottom end failure sometimes so, this time around I decided to open it all the way up.

No doubt, that was all out of your hands.. I basically did what you did to your old one plus a head gasket, kinda wishing I went this far but 20k of smiles since the swap so I'm not complaining yet!
 
Well I struck Land Cruiser gold. I wanted to wait until it was official before I posted but money has changed hands and I have TWO new old stock 12ht long blocks headed my way from the other side of the world.

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Damn.

Start buying more parts before Toyota discontinues them or makes them verboten when they realize their oversight.
 
oh. just you wait till I get my hot little hands on one of those!

mind sharing how much they set you back?
 
So the main and rod bearings were both .25 over sized and in really good shape. I had the machine shop clean and polish the crank and mic the journals for the .25 under sized spec so its ready to go. Cam shaft was cleaned and mic'd as well and I'm good to go with standard size bearings on it.

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Picked up one more piece to the puzzle on my lunch break. New main, rod, and cam bearings. If I can get the block painted this weekend I'll be putting the crank back in the block. Need to find somewhere in town to get some plastigauge to check oil clearances. Last time I asked for plastigage at a regular parts store the parts professionals behind the counter had never heard of it before.

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Plastiguage is not an actual measuring tool, don't do all this good work and then trust a silly crushed plastic straw. Get an the rods actually measured properly.

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Plastiguage is not an actual measuring tool, don't do all this good work and then trust a silly crushed plastic straw. Get an the rods actually measured properly.

That's entirely unnecessary for a refresh or this kind of rebuild. If the rods needed to resized for some reason it might make sense to measure them like that just to get a ball park idea of what size bearings to order and even then plastigauge would be HIGHLY recommended to check final oil clearance measurements. The only thing measuring the crank and rods and crank and main cap/block journals does is give you target a goal for oil clearances. Plastigauge will give you the ACTUAL clearance. Is it absolutely necessary? No. Im sure the engine would run just fine but, its the only way to do it correctly/thoroughly.
 
Did you not have your rods resized?
 
Got the block back from clean up. It received a light hone job and the deck was checked for flatness. I soaked it down with acetone and put a couple of heavy coats of engine enamel on then two coats of clear.


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