Engineering · Diesel — Cooling
Running a diesel engine at too LOW a jacket-water temperature tends to cause:
- AFaster warm-up and less wear
- BCold corrosion, poor combustion, and increased cylinder wear✓ Correct
- CHigher thermal efficiency
- DReduced lube-oil consumption
Explanation
Overcooling lets combustion gases condense into corrosive (sulfuric) acid on liner walls and worsens combustion, accelerating wear. Engines have a minimum operating temperature for this reason.
Authority: Diesel Engines (USCG engineering topic)
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