12VQSK38

Inspect outer cylinder wall surfaces for honeycomb erosion patterns, especially along connecting rod swing direction. Verify DCA (Diesel Coolant Additive) quality and concentration. Check for water-in-oil condition via crankcase oil sampling.

Monitor coolant levels monthly, inspect radiator/heat exchanger for blockage, test thermostats, check water pump operation and cooling fan function. Look for steam venting or elevated temperature gauge readings.

Listen for whining/high-pitched squealing (bearing failure) or rattling (excessive shaft play). Inspect for boost leaks (hissing sounds). Check intake/exhaust temperatures. Verify compressor wheel integrity for damage.

Drain water separator regularly, replace fuel filters per maintenance schedule (typically 1500 hours), test fuel pressure, inspect injectors for proper atomization, check fuel pump operation.

Inspect all gasket seals (head, pan, crankcase covers) for seeping, monitor crankcase pressure (excessive pressure indicates seal failure), check oil level regularly for unexplained loss.