Engine rebuild super a

Goodman · Mar 17, 2011

I'm ready to purchase a full engine kit from this site, you guys twisted my arm and talked me in to it.
My engine does not have flat head pistons but dome pistons. The step head ones on this site, is that supposed to be replacement? The tops are different than mine in picture and I was concerned about valve clearance.

Thanks

nl00sb · Mar 17, 2011

as long as your head valves and rocker arms are stock or same as originals you should be all set
i put a set in my c last year from tisco same as what they sell here and did not have any problems and my head had .080 off of it

ADLM · Mar 17, 2011

Wouldn't the domed pistons create slightly higher HP than flat or stepped head?

Goodman · Mar 17, 2011

I don't know. The ones I have could be called a stepped head
but to me they looked more domed on one side.
Maybe someone can clarify to me the difference.

nl00sb · Mar 17, 2011

there i have seen on farmall m's a couple diffrent steped head pistons with a higher dome never on a c or a, not to say that u dont have taller ones, one thing to consider is the picture of the new pistons the actual one your getting or is it a genaric picture for that type of piston

El Toro · Mar 18, 2011

If your engine block is 354898R1 you can probably
use an overbore kit using 3.250" sleeve kit. I used an overbore kit from our local IH dealer back in 1975 in a Farmall A. They were the flat top pistons. It had plenty of power to pull that 16-inch moldboard plow. Even in sod it had a little wheel slippage since the rear tires were not loaded. Hal

gene bender · Mar 18, 2011

The domes are on the side away from the valves so the valve doesent hit the piston.Yes the higher the dome the more HP.

gene bender · Mar 18, 2011

To play it safe you mite want to remove one sleeve so you can give the measurements when ordering. The important one it what does it measure where the rubber o-ring seals at the bottom.

El Toro · Mar 18, 2011

A man in SC that was rebuilding his Super A engine and he was given the wrong sleeve kit so do as Gene suggested and measure the diameter of your sleeve at the seal which could be 3-5/16"
or 3-7/16". They used 2 different length sleeves. The sleeve with the narrow diameter should be 6-7/8" long. The other sleeve is 7-1/16" in length which was used in the Super C tractors and some of the Super A's. The man in SC needed the longer sleeve kit for his Super A. Hal

Goodman · Mar 18, 2011

Thanks Hal
Can someone confirm for me that the serial # for the engine kits are for the engine serial # not the tractor #.
My engine serial is 156584, but tractor serial is in the 320000 range.

Goodman · Mar 18, 2011

I called on this site for a rebuild kit. My tractor serial # is 320439. The parts guy said they do not sell a kit for that #. He said to ask in the forum what the difference is.
The highest serial kit they have is 310299.

El Toro · Mar 18, 2011

Is there a casting number on your block? Has the
the engine been replaced? Your engine block casting number should be 354898R1. Have you measured the old sleeve? Hal

Goodman · Mar 18, 2011

We know the engine hasn't been replaced since we got it in 1960. The number that is part of the block cast above the oil filter is 6342 DH . The number stamped on the block is FAA 156548.

Jim Becker · Mar 18, 2011

You must have some sort of Heinz 57. That engine block is from a '46 Farmall A. Order all your engine parts based on a Farmall A with that serial number. Just out of curiosity, do you have any sort of hydraulic system? Does the bell housing have a flat area below the fuel tank to mount a Touch-Control system?

Goodman · Mar 18, 2011

We have a touch control system. Full hydraulics. What serial
number tractor would a 46 be? My tractor is a 51 model.

El Toro · Mar 18, 2011

You need to measure the sleeve you removed and post the measurements on here and we can tell you which kit to buy. Your tractor was built in either 1951 or 1952 so the block may have been changed before you bought it. The casting number on the block should start with a 3 and be 6 digits long. Hal
Do you have hydraulics?

El Toro · Mar 18, 2011

The Farmall A's didn't have hydraulics unless the later blocks could have had hydraulics. You need to measure the old sleeve and that will tell you which kit to order. The difference is the length and diameter of the sleeves. Hal

Goodman · Mar 18, 2011

This is getting really interesting. Now that you mentioned the block came from a A instead of super a. The area where the hydraulic pump is on the block it has been braced in place. We always thought someone just broke the ear of block off from pulling tractor. Somebody apparently did excellent job of cutting out section of block and meshing in hydraulic pump with gears.
Where can find more information to verify what I have?
Did 46 A's come with 3 1/8 bore sleeves?

El Toro · Mar 18, 2011

From the factory they came with 3-inch pistons that gave you 113 cid. You can install 3-1/8" sleeve kit without any machining to the block. It will give you all the power you will need. Hal

CNKS · Mar 18, 2011

Your engine came off a 1946 A with the same chassis serial as your engine serial. Engine and chassis serials on the A and B matched up to 201000, I believe. Be sure you do what the others say and measure the sleeves, in case your engine was bored ovesize. Otherwise the kit you want has 3 1/8 sleeves. The 3.25 ones will not fit unless engine was bored oversize.

Goodman · Mar 19, 2011

My engine is a 1946 farmall A on a 1951 Super A Don't shoot me but I do have hydraulics. Someone welded hydraulic mount in normal place, meshed in with cam gear, amazing.
My sleeves are 3 5/16 od at seal, 3 1/8 bore, 6 7/8 long.

El Toro · Mar 19, 2011

You need to clean that block area thoroughly where your sleeve seals are installed and of any rust or dirt. The same in the recessed area at the top of the block where your sleeves seat. Use dish detergent on the lower edge of the sleeve so they slide easily into the new seal when installing them. You may need to make a small bracket to keep the sleeves from moving when installing the new pistons. Hal

Engine rebuild super a

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