ASE T2 Domain 3: Engine Block Diagnosis and Repair Welcome to your ASE T2 Domain 3: Engine Block Diagnosis and Repair 1. ASE T2: Engine Block Diagnosis and Repair A diesel engine block has been found to have a small crack after a coolant system pressure test. Which of the following repair methods is recommended for a high-pressure diesel engine block? A. Epoxy sealant application B. Cold metal stitching C. Welding with preheat and post-heat treatments D. Replacement of the engine block None 2. ASE T2: Engine Block Diagnosis and Repair During the inspection of a diesel engine block, the technician notices excessive main bearing wear. What could be the primary cause of this condition? A. Over-torquing of the bearing caps B. Misalignment of the engine block main bore C. Insufficient crankshaft end play D. Excessive oil clearance None 3. ASE T2: Engine Block Diagnosis and Repair When measuring the cylinder bore of a diesel engine, the technician finds out-of-round conditions exceeding manufacturer specifications. What is the MOST likely cause of this condition? A. Cylinder glazing B. Uneven head gasket failure C. Excessive piston slap D. Uneven thermal expansion None 4. ASE T2: Engine Block Diagnosis and Repair A diesel engine has been overhauled, and the technician has opted to use oversized pistons. What additional engine block repair must be performed to accommodate these pistons? A. Honing of the existing cylinders B. Knurling the cylinder walls C. Reboring the cylinders to the oversized specifications D. Application of a cylinder sleeve None 5. ASE T2: Engine Block Diagnosis and Repair After a complete engine rebuild, a technician notices that the diesel engine exhibits low oil pressure at idle when fully warmed up. The oil pump and pressure relief valve have been replaced. What is the MOST likely cause? A. Defective new oil pump B. Excessive main bearing clearance C. Incorrect oil viscosity D. Air entering the oil pickup tube None 6. ASE T2: Engine Block Diagnosis and Repair A technician finds coolant in the engine oil during a routine service of a diesel engine. Aside from a head gasket failure, what other engine block issue could cause this symptom? A. Warped cylinder head B. Cracked engine block C. Leaking intake manifold gasket D. Failed water pump seal None 7. ASE T2: Engine Block Diagnosis and Repair After replacing the piston rings on a diesel engine, the technician notices that the oil consumption is still high. What is the next step in diagnosing this problem? A. Check for a stuck open PCV valve. B. Perform a leak-down test on the turbocharger. C. Inspect the integrity of the valve seals. D. Measure the cylinder wall clearances. None 8. ASE T2: Engine Block Diagnosis and Repair The block deck surface on a diesel engine must be perfectly flat to ensure a proper seal with the head gasket. If a straight-edge and feeler gauge test indicate high spots on the deck surface, what is the recommended procedure? A. Resurfacing the block deck B. Applying a thicker head gasket C. Torquing the cylinder head bolts in a different sequence D. Using a chemical sealant on the head gasket None 9. ASE T2: Engine Block Diagnosis and Repair A technician is determining the cause of premature main bearing failure on a diesel engine. What condition could contribute to this failure if the crankshaft measurements are within specifications? A. Incorrect crankshaft thrust bearing installation B. Over-torqued connecting rod bolts C. Damaged oil pump gears D. Worn piston pins None 10. ASE T2: Engine Block Diagnosis and Repair A diesel engine experiences repeated failures of the rear main seal. What could be the cause of this problem if the seal and crankshaft surface are free of defects? A. Misaligned bell housing B. Faulty oil pressure regulator C. Damaged flexplate D. Improper engine mounting None 1 out of 10 Time is Up! Time's up
