Is the C7 engine reliable?
Cat’s C7 engine had a few notable problems, with roughly half of them experiencing engine failures at (or before) 500,000 miles, often requiring an overhaul. However, this failure rate doesn’t differ at all much from a lot of competitor engines produces in the Tier 4 era. CAT C7 Engine Intermittent Speed Sensor and Injector Issues. C7 engines often face injector failures and intermittent speed sensor malfunctions causing rough running and power loss. Intermittent speed sensor faults in CAT C7 engines can cause loss of power, excess smoke, and rough running.