IH motors

I'm wondering about the 414, 436, and the 466's. Are the blocks the same? Is the difference the cranks, rods, and the sleeves? Do these motors have a wet or dry sleeve? Just trying to put together a hot farm IH and haven't really ever messed with IH's before. Didn't the 414 come in the 966 & 1066? Any help is greatly appreciated. Thank you!

Brad: All three have the same block and are wet sleeves.

I've been told that they are the same block and sleeves for all three engines by a reputable mechanic. Only the crank and rods are different.

Same bore, different strokes.

Another rumor I've heard is that if you use the 436 crank and early Magnum pistons and sleeves, you get something over 500 cubes.

966: 414 non turbo
1066: 414 turbo
1466: 436 turbo I think
1566: 436 turbo
986: 436 non turbo
1086: 414 turbo
1486: 436 turbo
1586: 436 turbo
3688: 436 non turbo
5088: 466 turbo
5288: 466 turbo
5488: 466 turbo
I'm pretty sure on most of these. I have never seen the inside of the engines but the local IH mechanic told that they are all the same and our 986 engine looks the same as an 1066 block. The 466 that IH put in there trucks is the same block as the one they put in the tractors.

Farm tractors all use the same block for 414, 436, and 466. The blocks for use with turbo chargers have two oil cooling jets per piston while the naturally aspirated engines only have one jet per cylinder. All blocks are drilled for two jets per cylinder so they can be set up either way. Look at the ID tab to see how it was originally built. Turbo engines will have DTT stamped on them along with the engine size while NA engines will only have DT. (ie DTT414 or DT436)

Later blocks have larger diameter lifter bores. Camshafts also were changed to match the larger lifters but the later cam can be used with the old style lifter. Later cams also have different valve clearance settings. there is supposed to be a decal on the valve cover if the later cam is installed in an early engine. Depending upon which style lifter is installed, different push rods are used.

Sleeves and connecting rods are all the same. Pistons have the pin holes located at different lengths from the top of the piston to allow for the different stroke crankshafts. Pistons and rings are different for NA engines when compared to Turbocharged engines. Pressure compensated ring sets also require top mounted breather pipes versus the original style mounted near the camshaft.

Oil pumps have wider rotors on turbo engines. Later NA engines use the original style turbo pump and another still wider rotor pump is used on the later turbo engines.

Cylinder heads for turbo engines have different cooling jets than NA engines. NA heads will have an H cast into them under the intake manifold.