Michigan Engine Repair Exam questions and correct answers

Michigan Engine Repair Exam questions and correct answers Which of the following is true about adjusting valve tappet clearance? VALVE TAPPET CLEARANCE SHOULD BE ADJUSTED AT TDC AT THE END OF THE COMPRESSION STROKE. The hydraulic lifters are noisy at highway speeds and quiet at low speeds, what should you do first as you diagnose the problem? Check Crankcase oil level. The valve timing on most engines is controlled by: A belt, chain, or gear drive. The bearing inserts below have been plastiguaged. What can you determine about these pictures? Insert "B" has more clearance. Excessively worn valve guides: All of the above. Intake valve deposits, as shown below: Can reduce volumetric efficiency and affect high rpm performance and cause driveability problems during a cold engine operation. What is being checked on the valve spring on the illustration below? Installed height. You are using a vacuum guage connected to the intake manifold, which of the following is true? When the engine is rapidly accelerated, the needle will rise to a high reading. What are minimum and maximum measurements of state shaft given 2.125 plus or minus .015? 2.110-2.140 The mechanic determined no fuel squirms into the carburetor when the throttle is opened quickly, what could be the cause? All of the above. A warm engine has low oil pressure. The most likely cause of low oil pressure is : Leaky main bearing seals. What is the reading on the 0-1 inch micrometer below? 5.750" You are reinstalling pistons with new rings, the ring compressor will not fit tight around a piston skirt and the rings bind on the block surface. What should you do? Check the ring end gap. You have checked the crankshaft and found the following measurements below. The rod journal surfaces are smooth and no rod journal taper is present. What should you do?