IDI Diesel Tech
The widely popular 7.3L IDI diesel was really only a small step above its 420 cid predecessor. With a more robust cylinder head and larger cylinder bore, the engine was both more powerful and arguably more stout. The engine can be found in Ford pickups from 1988 through 1994, until being replaced entirely by Internationals 7.3L DIT.
Developing on their inherent successes and shortcomings in the diesel marketplace, GM's Detroit diesel division introduced the 6.5L for the 1992 model year. The engine would see many military applications in addition to being offered in 1/2, 3/4, and 1 ton pickups from General Motors' GMC and Chevrolet truck brands.
The 6.9L International Harvester IDI diesel found its way into the 3/4 and 1 ton Ford F-Series for the 1983 model year. Though its applications are not limited to Ford pickups, the diesel equipped Ford certainly helped sculpt the diesel pickup sector for future endeavors by the Big 3. Robust and rugged, the IDI made honest power and torque for a diesel designed with 1980's technology.
In their quest to bring to market a fuel sipping diesel mill for Chevrolet and GMC pickups, Detroit Diesel developed a 6.2L diesel. For its intended purposes, the engine was overall successful. Being relatively short on power, however, the marketplace quickly outgrew the engine in favor of more powerful alternatives. Albeit several downfalls, the 6.2L is an honest engine that served as an economical alternative to gas guzzling big blocks of the era.
Often falsely perceived as a modified version of GM's 350 cid gasoline engine, the 350 Olds was GM's first attempt to make the diesel engine popular in the car and light truck sector. Considered by most as a failure, the 350 Olds may very well have made the concept of a diesel powered vehicle less popular amongst the masses.
When Ford introduced the Ranger pickup to the World in 1983, a 59 horsepower, 41 mpg Perkins diesel was among the engine options. The engine would be replaced in 1985 by a turbocharged Mitsubishi diesel, which despite being more powerful wouldn't last beyond the 1986 model year.
How to remove and replace/repair the oil cooler in a 6.9L or 7.3L IDI diesel. The oil cooler is located below the driver side exhaust manifold, where continuous heat cycles have a tendency to wreck havoc on the gaskets separating the oil and coolant passages.
Why remove the intake manifold to replace the plagued FSD/PMD when you can relocate it to a cooler, more convenient location that ensures it won't leave you stranded?
The 6.9L IDI and 7.3L IDI engines should not be particular difficult to start when the glow plug system is functioning properly. In fact, an IDI with solid glow plugs should start after only a few cranks of the engine, even in moderately cold conditions.
See what it takes to replace the OPS on a 1992 to 1995 6.5L GM diesel. For these model years, the oil pressure sensor doubles as a switch, powering on the fuel lift pump only once oil pressure builds.