4089759

4089759 is catalogued as CUMMINS ISLE LOWER GASKET SET. In service this component seals a joint against pressure, coolant or oil. Low value in itself, and responsible for a disproportionate share of downtime when it lets go. This number is not mapped to a single engine family in our catalogue, which usually means it spans several builds — send the engine serial and we will confirm fitment against your unit specifically.

This number carries 1 cross-reference in our catalogue: CM660BK-GT40C. Buyers routinely search the number stamped on the part they are removing rather than the number that will actually ship, so all of these are searchable here and all of them reach this page. If the number on your old part is not listed, send us a photograph of the markings — supersession chains on the older families run deep and we may still be able to place it.

Buyers usually reach this number for one of a small set of reasons: visible weeping or a wet joint face that returns after cleaning; coolant loss with no external leak, or oil and coolant mixing; combustion pressure in the cooling system, or a header tank that pressurises quickly; oil on the underside of the engine after a period standing.

Branded aftermarket gasket product is generally good and we quote it openly. The exception is head gaskets on the large KTA families, where cylinder pressures make the genuine part the sensible purchase and we will say so on the line.

Consumable lines are worth ordering ahead rather than at the point of need. Shelf life is not the constraint; freight is. Consolidating a period's requirement into one shipment through Dubai is materially cheaper per unit than ordering by service interval, and it is the difference between a planned sea shipment and an emergency air freight.

To quote this line accurately we need the engine serial, the CPL, and the scope of work — a single gasket, a head set and a full overhaul set are three different purchases. Orders are confirmed with a 50% deposit, balance on shipment.