[giddygoat]

Does anyone know if this was produced?
http://wildaboutcarsonline.com/membe...HC_Six_1-4.pdf

[Sirrotica]

It most certainly was, I owned a 65 Jeep Wagoneer with one in it and a 3 speed stick. The engine ran well when they ran, they were known for some problems such as valve problems and head gaskets. They also had a timing chain to drive the cams and were susceptible to timing chain failure. They had a mechanical rocker system that had to periodically lashed as well.

If an owner kept up on the maintenance they ran very well, if not they had their share of problems. I worked in a Jeep dealership in 1969 so I saw and worked on a few of them beside the one I owned. After the head gasket blew in mine I pulled it out and replaced it with a 65 389 out of a Bonneville.

[Sirrotica]

I almost forgot, there was a plate behind the timing chain that also served as a front motor mount and as it flexed it started oil leaks. In the Jeeps they almost always leaked oil.

After Willys stopped producing them in civilian Jeeps (1962-1965) they were produced in Argentina with some updates until the early 80s. The US government also used them in the M715 5/4 ton Jeep military trucks until the late 60s.

[Jack Gifford]

If I remember right (??) that engine had an odd cost-saving measure- a single cam lobe for each cylinder! The designed-in orientation of the cam followers provided what would normally be called lobe-separation angle. This pretty much ruled out aftermarket performance cams.
Or am I confusing it with some other OHC inline engine- Brad? Anybody?

[Sirrotica]

Yes, you have that fact correct Jack, a single camshaft that had one lobe for each cylinder, very unique design.

[Half-Inch Stud]

50 Lb flywheel, 40 lb bell hsg, otherwise a slick OHC6. what HP did that 230 make?

[Jeff Hamlin]

From the web...

Another innovation was the all-new overhead-cam six-cylinder engine, which debuted in the 1962 Jeep pickups and wagons. It was the only U.S.-built overhead-cam engine in production back then and was designed for heavy-duty performance with maximum efficiency. Amazingly robust for its size, the hardy Jeep Tornado-OHC six produced 140 hp (and that was net horsepower, not gross) with excellent fuel economy. In fact, tests showed Jeep's Tornado-OHC engine had the lowest specific fuel consumption of all production gasoline engines on the market; however, Wagoneer was relatively trim: curb weight on the four-wheel-drive Wagoneer was 3,701 pounds. For the first two and a half years, the OHC six was the only engine available.