The diesel engine shown in the illustration can be fitted with a pyrometer at each exhaust elbow. If one of the cylinder pyrometers is reading significantly higher than the others, which of the following should be your FIRST action? Illustration MO-0005
• Relationship between exhaust gas temperature and fuel quantity/timing to that cylinder • Difference between a local cylinder problem and a common system problem like cooling water distribution • Order of troubleshooting: start with the least invasive / easiest checks before disassembly or part replacement
• If only one cylinder’s pyrometer is high, what kinds of faults would affect just that cylinder rather than the whole bank? • Which option allows you to verify or correct a possible over-fueling or mis-adjustment without immediately replacing or dismantling components? • How would a serious fault like a burned exhaust valve likely show up besides just a high pyrometer reading?
• Confirm which choices involve a quick external adjustment or inspection versus opening up the engine • Ask whether a cooling water header blockage would realistically affect just one cylinder’s exhaust temperature on this V-type engine layout • Consider that replacing parts or pulling valves should NOT be your first step unless simpler checks have been ruled out
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