ASE - Engine Repair Study Guide questions with correct answers

Technician B says that Part 'X' is used to correct installed spring height. Who is right? - Answer B. Technician B only A compression test shows that one cylinder is too low. A leakage test on that cylinder shows that there is excessive leakage. During the test, air could be heard coming from the tailpipe. Which of the following could be the cause? - Answer D. an exhaust valve not seating Technician A says that main bearing oil clearance can be checked with Plastigage. Technician B says that main bearing oil clearance can be checked with a dial bore gauge. Who is right? - Answer C. Both A and B To raise the seat contact on the valve face shown above, which combination of stones should be used? - Answer A. 45 degree and 60 degree stones A technician takes a compression reading on a 4-cylinder engine, and gets readings of 140, 135, 135,, and 40 psi. Then he preforms a wet compression test, and the readings are almost the same as those in the first test. Technician A says that a burned valve could cause these readings. Technician B says that a broken piston ring could cause these readings. Who is right? - Answer A. Technician A only An engine is being rebuilt and the crankshaft connecting rod journals have been ground undersize. Specifications show that the original connecting rod journal size was 2.1228-in. 2.1236-in. If the journals now measure 2.1032-in., what size bearings should be used? - Answer C. 0.020-in. undersize Camshaft lift is defined as: - Answer B. the height of the lobes on the camshaft