International Harvester Scout - Engines

Engines

Engine produced by International Harvester:

• IH 4-152** (See note below on this engine)
• IH 4-196** (See note below on this engine)
• IH V-266
• IH V-304 (Note: This is NOT the same engine as the AMC 304 V8)
• IH V-345
• IH V-392 (Note: Based on the same block as the 345)

Built by American Motors Corporation

• AMC 6-232
• AMC 6-258
• AMC "V400" (some 73/74 pickups and travelalls had this, the AMC 401, installed as there was a shortage of the V-392 engines.

To tell the AMC engine from IH's own V8s, look at the thermostat housing. AMC is round. IH is rectangular. There are other differences but this is the quickest method.

Built by Nissan

• Nissan SD33 (diesel) (naturally aspirated)
• Nissan SD33T (turbo diesel—1980 only)

International offered the Scout with a variety of engines over its years of production. The Scout 80 (1961–1965) had the gasoline-powered 152 four-cylinder as its standard engine. From 1965 to 1971 (Models 800, 800A, and 800B), engine options were the gasoline-powered 196 four-cylinder, AMC 232 six-cylinder, 266 V-8, and the 304 V-8. A turbocharged version of the 152 four-cylinder engine was offered from 1965 to 1967.

It is also worth noting that International Harvester was not really geared up for the production of a four-cylinder engine, as was seen in the 152 and 196 engines. Consequently, they simply cut off four of the cylinders and sold these two engines as half of the V-304 and half of the V-392. This is why these engines are in an inline, yet slanted formation, half of a V-8. They became small engines with a great deal of torque, excellent cooling because the block contained water channels originally designed for the larger engines, all while getting quite acceptable fuel economy. The Scouts with the 196 engines easily achieved 20 miles per gallon.

There are rumors that a few early Scouts left the factory with Perkins diesel engines, but these would have been special-order trucks and not a standard option. The Scout II (made between 1971 and 1980) had the following engine options: the 196 4-cylinder, 232 6-cylinder (early production), 258 6-cylinder (later production), 304 V-8, and 345 V-8. At the time, International did not manufacture a diesel engine small enough to be used in the Scout, and so starting in 1976 used the Nissan SD33 diesel engine as a diesel option. This engine was replaced by the Nissan SD33T turbodiesel engine in 1980.