ASE T2 Diesel Engines (Medium/Heavy Truck) case studies
ASE T2 Diesel Engines (Medium/Heavy Truck) · Put your knowledge to work in context.
ASE T2, Diesel Engines, is one of the eight Medium-Heavy Truck certification tests in the ASE T Series (T1–T8). ASE describes the T Series as identifying and recognizing Medium and Heavy Truck Technicians who can demonstrate the knowledge and skills necessary to diagnose, service, and repair different systems of Class 4 through Class 8 trucks and tractors. The ASE T2 Diesel Engines (Medium/Heavy Truck) case studies are 5 cases and about 2,309 words.
1Overhead Set After Head Reseal on a High-Mileage ISX
A 2013 15L engine with 780,000 miles comes in for a leaking head gasket. The shop resurfaces nothing (head is within flatness spec), installs a new gasket, and the tech performs an overhead set with a torque wrench and dial indicator.
516 words, about 3 min2Cylinder Liner Protrusion After an In-Frame Overhaul
A tech is doing an in-frame on a wet-liner six-cylinder and replaces two liners because of cavitation pitting. The block deck is cleaned with a roloc disc.
442 words, about 2 min3Overheating Only Under Load With a Full Coolant Level
A highway tractor with an electronically controlled viscous fan and a charge-air-cooled radiator overheats only when pulling a grade at 65 mph, reaching 225°F coolant with the fan commanded to 100%. At idle and under light load it holds 195°F.
466 words, about 2 min4Low Power and Black Smoke After Air Filter Service
A tech services the air induction system on a turbocharged diesel: new primary filter, cleaned the housing, and reconnected the charge-air piping. The customer immediately reports low power, black smoke under acceleration, and a new whistle.
415 words, about 2 min5Crank/No-Start With Good Battery and a Fresh Starter
A truck cranks slowly and intermittently fails to start. The battery passed a conductance test at 12.6 V and 850 CCA (rated 900).
470 words, about 2 min