Engine Company

KEEP IT COOL

Issue 7 and Volume 148.

KEEP IT COOL BY JEFF ROSENFELD You`re pumping the attack engine at a house fire. It is a hot summer day, and you begin to smell a strange odor. After looking around the piece for the source, you notice steam blowing out from the engine covers. The engine water temperature gauge is pegged at 240°F. You think, “Sure hope the chief doesn`t blow like this when he finds out the engine has overheated.” Overheating a diesel engine can have disastrous results. Even a minor run of high-temperature operations can lead to warped or cracked cylinder heads and blown head gaskets. Unit downtime and expense are debilitating for any department. Diesel engines are designed to operate within a specific temperature range–usually 160°F to 185°F for natural aspirated engines, and up to 195°F for turbo-equipped models. Newer units with electronic controls can actually reduce the power output of the engine by throttling…

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