Section 03-04E: Turbocharger, 7.3L Diesel Engine | 1996 F-250, F-350 and F-Super Duty Workshop Manual |
The turbocharger can be identified by the turbocharger I.D. plate.
The Garrett TP-38 turbocharger is a non-wastegate controlled turbocharger used on the 7.3L direct injection (DI) turbo diesel engine.
The turbocharger consists of gas turbine and air compressor wheels mounted on opposite ends of a common shaft. The wheels are enclosed by housings. The shaft is enclosed by a center housing.
The internal components are oil and air cooled. Engine oil is circulated through the center housing that acts as a heat barrier between the hot turbine and the cold compressor. The shaft bearings are of the sleeve type and are lubricated by engine oil.
High velocity engine exhaust gases drive the turbine shaft assembly to speeds up to 130,000 revolutions per minute. Filtered air entering the compressor side of the turbocharger is compressed and delivered to the cylinder heads at a pressure higher than atmospheric pressure. Because more air is delivered to the intake manifold portion of the cylinder head, the result is more power, fuel efficiency and an ability to maintain power at altitude.