Builds 1987 fj60 12h-t h55f conversion

[roma042987]

This brand new valve train is beautiful.

Little bit of trash in the bottom of the pan and some rusty looking residue.

 

[roma042987]

I kick myself but I didn't take any photos of the cylinders. Number three had some rust on the cylinder wall, not much but I didn't like it so I stripped it down to the bare block and took it to the machine shop next door for a second opinion. I was thinking he might could hone it and I'd be all good. Well I got the news that it needed to be bored 1mm. Not terrible news since I already have the 92mm ring compressor from the last build. So I ordered up some new 92mm pistons from Australia, these have the steel Alfin inserts so it's an upgrade at the same time.

 

[roma042987]

Block back from the machine shop. I wish I would have stripped the paint prior to taking it over there so I could have just painted it right when I got it back but I just didn't think of it.

Since all the rod, crank, and cam bearings are new and perfect I'm reusing them and therefore left the cam bearings in the block. Big headache out of the way I don't have to worry about.

After lots of paint stripper and wire brushing

 

[roma042987]

 

[roma042987]

Oh I guess I forgot to mention but the drivetrain currently in the truck is going in my 40 . The turbo 3b in it now will go into another 40 build which will eventually be sold. I have 8500 miles on the rebuilt 12ht so far so I'm thinking it will probably have 15k or so on it next year and have proven itself reliable and broke in.

I clear coated the block this morning and pulled the tape off. Sure is a beaut. It was slow at work today so I went ahead and installed the new pistons on the rods as well. Stock pistons are in the classifieds.

 

[roma042987]

This engine was stored for a very long time so at some point some moisture got on the outside surface of the crank shaft and formed some rust. The rear main seal kept the rust off of the critical surface but I still wanted to remove it all since the rear main seal has to be slid over the end of the shaft. I really didn't want to sand this area so I decided to try an electrolysis bath to remove the rust last night.

here is the area I needed to treat

I didn't want to submerse the entire crank shaft so I suspended with this contraption. Your really not supposed to do this indoors because of the fumes that are a byproduct of this but since I was doing a small piece and its in an upstairs bedroom I went ahead and went with it.

here is the mixture of water and arm and hammer washing powder. Instead of rods for the electrodes I used a scrap piece of sheet metal that I bent into a circle, this way it has a clear line of site all the way around the crank.

here you can see the reaction starting to work and rust just coming off. I turned the battery charger onto two amps, and the bubbles immediately started to form which means its working.

 

[roma042987]

here is the mess that's left in the bucket after about 2.5 hours of being submersed in the solution vat. Curiosity got the best of me so I pulled the crank out and looked it over...was definitely working so I put it back in for 2 more hours.

here is what the crank shaft looks like now. The surface is pitted a bit but much much better. It feels smooth to the touch and no sanding is needed. If need be I could always install a speedi sleeve down the road but again the critical area didn't have any rust on it to begin with.

 

[drnekFJ40]

I really liked the pictures documenting your trip out west..I did the almost identical trip in 2014 and 2016 so I remember a lot off places on your pictures as well....West is just so scenic...The road from Cody to Yellowstone through the canyons is so spectacular..Did you stop by Pahaska Teepee on the same road?It is the Buffallo Bill"s original cabin and just the feel to walk inside was fantastic...I did a lot of Oregon trail on dirt roads,too...All Wyoming,etc...I am glad you enjoyed it as much as I did...Thanks for sharing

 

[inoplanetyanin]

Roma's Cruiser storms the Sherman Pass

and finally makes it

 

[roma042987]

Doesn't look like a difficult section at all but open differentials sure make it all a lot harder than it needed to be. I cant wait to get my cable locked axles under this thing.

 

[inoplanetyanin]

Yeah, you can see the left tire is not turning when you tried to stay to the left.

 

[mcguirejohnson]

Nothing like the bark of a 12ht! Nice pics & videos Roma, looks like it was an awesome trip.

 

[roma042987]

Nothing like the bark of a 12ht! Nice pics & videos Roma, looks like it was an awesome trip.

Got that right I love that sound! Thanks I had a blast, as always though I wish I had a lot more time out there.

 

[roma042987]

Last week I got some work done on the 12ht. Fitted the crank as well as the pistons. I checked the ring gap on the rings prior to install and the were perfectly in spec and nowhere near the service limit. The main and rod bearings I reused since they are the originals and never been ran. I trust the Toyota guys that assembled it 30years ago know what they are doing so I didn't bother plastigauging the bearings.

 

[roma042987]

This tapered ring compressor made life easy.

 

[roma042987]

Today I installed the new h55 and rebuilt split case I put together last year that I'd documented earlier in the thread. This is the original transfer case to this 60.
Just for reference so I'll know how many miles are on the new trans I took a photo of the current mileage

Old trans is going to a new home in Virginia. I'm going to install a terrain tamer kit in the split case for posterity even though it gave me no complaints for the 15k or so miles that I've had it.

New one going in.

New shifter as well.

Miles for reference.

 

[fitzmooney]

Seems like a bit of a gamble using the old bearings in a recond top end.
For the amount of time and money put into the job so far, new bearings would be a cheap insurance.

 

[roma042987]

Seems like a bit of a gamble using the old bearings in a recond top end.
For the amount of time and money put into the job so far, new bearings would be a cheap insurance.

This is a new old stock engine. As in 0 miles.

 

[fitzmooney]

Not a problem then.

 

[ozcrusier]

Nice find on these new 12ht engines but from the above pics looks like this engine never came with the strengthening plate between the block and oil pan.