21.

Answer A is wrong. Both technicians are correct. RTV (Room Temperature Vulcanizing) is an aerobic sealant meaning that it cures in the presence of air.

Answer B is wrong. Both technicians are correct. Keep RTV away from sensors.

Answer C is correct. Anaerobic sealers are usually used on smooth, machined components.

Answer D is wrong. Both technicians are correct.

Return    Learn more about automotive sealants.

22.

Answer A is wrong. Both technicians are correct. The main caps are usually numbered with a directional arrow.

Answer B is wrong. Thin thrust bearings will result in excessive crankshaft end-play.

Answer C is correct. Both technicians are correct.

Answer D is wrong. Both technicians are correct.

Return    Learn more about main bearing caps and their measurements.

23.

Answer A is wrong.

Answer B is wrong.

Answer C is wrong.

Answer D is correct. When injecting oil increases the cylinders pressure, the piston rings are faulty. Compression is blowing past this weak seal.

Return    Learn more about cylinder compression testing and results.

24.

Answer A is wrong. Both technicians are correct.

Answer B is wrong. Both technicians are correct.

Answer C is correct. This is true it is a good idea to help avoid a mix up, but never mark the arm or beam as this can create a weak point and eventually engine failure. Mark the base by the cap.

Answer D is wrong. Both technicians are correct.

Return    Learn more about connecting rods and their corresponding caps.