Key Features:
* Displacement: 7.3 liters (444 cubic inches)
* Configuration: Inline 6-cylinder
* Fuel System: Likely a mechanical fuel injection system (though some later models might have had electronic controls). This is a crucial point – mechanical systems are simpler but require more maintenance; electronic systems are more sophisticated but can be more complex to troubleshoot.
* Aspiration: Naturally aspirated (no turbocharger) or turbocharged depending on the application. Turbocharged versions offered significantly more power.
* Power Output: Varied greatly depending on the application and turbocharging. Expect a range from roughly 160 to 210 horsepower, with torque figures in the 400-500 lb-ft range. Precise figures need to be verified from the specific application's documentation.
* Construction: Known for its robust construction and durability. Iron block and head were common.
* Maintenance: These engines are known to be relatively simple to maintain, but require regular servicing (oil changes, fuel filter replacements, etc.) to operate reliably. Proper maintenance is key to longevity.
Potential Issues (Common to older diesel engines):
* Fuel System Problems: Leaks, clogged injectors, fuel pump issues are common with age. Mechanical injection systems require meticulous maintenance.
* Glow Plug Issues: Especially in colder climates, failing glow plugs can hinder starting.
* Engine Leaks: Oil leaks from seals and gaskets are common, particularly with high mileage engines.
* Turbocharger Problems (if applicable): Turbochargers are prone to failure, especially with neglect.
* Clutch Issues (if applicable): High torque can put a strain on the clutch in heavy-duty applications.
Finding Specific Information:
To get the most accurate information about *your specific* 1988 Navistar 7.3L diesel, you'll need more details:
* Engine Serial Number: This number will pinpoint the exact engine specifications.
* Vehicle Application: The make, model, and year of the truck or vehicle it's in will provide context for its intended use and power output.
With this information, you can consult:
* Navistar/International Harvester service manuals: These manuals often contain detailed specifications, troubleshooting guides, and maintenance schedules for specific engine serial numbers.
* Online forums and communities: Many online communities dedicated to classic trucks and diesel engines can be a good source of information and advice.
In short, the 1988 Navistar 7.3L DT466 was a tough engine in its day, but age and lack of maintenance can cause significant problems. Finding specific details relevant to your exact engine is critical for accurate information and troubleshooting.
