What Causes High EGT on a 6.7 Cummins & How to Fix It
Posted by Will on May 8, 2025
What Causes High EGT on a 6.7 Cummins & How to Fix It
High exhaust gas temperatures (EGTs) can be a silent killer for your 6.7L Cummins engine. Whether you're towing heavy, daily driving, or running performance mods, keeping your EGTs in check is critical for engine longevity and power.
In this post, we’ll break down:
Normal EGTs for a 6.7 Cummins
Driving Type
Normal EGT Range (°F)
Idle
300–500
Highway Cruising
600–900
Towing / Heavy Load
1000–1200
D
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