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Guides, fault codes and practical knowledge about Cummins engines — from choosing parts to servicing.

Cummins drive belt and tensioner: signs of wear, a 10-minute inspection and choosing the right part

An accessory drive belt costs less than an hour of work for most machines. And when it snaps in the field, it stops the water…

Ticking from the top of the engine is one of those noises that are easy to dismiss. “Diesels always tick” — yes, but a healthy…

The head gasket has one of the hardest jobs in the whole engine. It has to hold combustion pressure in the cylinders (tens of bar,…

Bearing shells are the cheapest component in an engine — and getting them wrong costs the most. A set costs a fraction of the price…

An engine rebuild rarely fails on the difficult parts. It fails on a detail: a missing O-ring, a gasket that wasn’t in the set, or…

The fuel shutoff solenoid — also listed in catalogues as a stop solenoid or fuel solenoid — is one of those parts nobody thinks about…

When someone in a workshop just says “Cummins”, nine times out of ten they mean a B series engine. It is the manufacturer’s most popular…

A warning lamp comes on, the display shows something like SPN 3251 FMI 0 — and that is where the guessing starts. Yet Cummins engine…

Overheating is one of the few faults where the cost of delay grows by the minute. A Cummins engine that exceeds its temperature limit can…