Overview — Oil Suction Pipe Sealing Gasket C3939352
C3939352 is the sealing gasket for the oil suction pipe joint on Cummins diesel engines, sealing the connection between the suction tube and the oil pump or oil pan pickup. We can supply all the original and replacement part numbers listed below, in stock or available on order — welcome to enquire by part number.
Parts Characteristics
The gasket is made from a fuel- and oil-resistant material that stays flexible under heat, so it keeps its sealing pressure over long intervals instead of hardening and weeping. Its profile matches the flange of the suction pipe connection, with the correct bolt-hole pattern and an inner opening sized to the oil flow. As an OEM-spec part it restores the designed sealing force at the joint, preventing air ingress on the suction side — a critical point, because an air leak on the oil intake side causes oil pressure fluctuation and noisy operation of the lubrication system.
Applicable Models & Applications
This sealing gasket is used on Cummins engine families where the oil suction pipe meets the oil pump or pan pickup, including industrial, generator, marine and construction applications. The family reference C4898301 covers the same joint across adjacent engine builds. It is a low-cost part that is typically replaced whenever the suction pipe is removed for pan or pump service. Confirm the flange shape and bolt spacing against the old gasket before ordering.
Maintenance & Replacement
Check the suction pipe joint at each oil change for oil seepage or wetness around the flange. A failed gasket here can also allow air into the oil circuit, which shows as an unsteady oil pressure gauge and extra noise from the pump. When the gasket is replaced, clean both sealing faces thoroughly, remove all old gasket material without scratching the metal, and fit the new gasket dry or with the sealant specified in the manual — never use an oversized gasket or extra layers to compensate for a bent flange. Torque the bolts evenly in the sequence given in the service manual.
Price Reference (USD)
The reference price for this Sealing Gasket (C3939352) is approximately USD 5 – 18 per unit depending on brand grade, quantity and shipping destination. This is a planning estimate only — confirm current pricing and availability with our sales team before ordering.
Also in the SEALING GASKET Series
C4898301.
Value & Service
Because this gasket is a wear item that is cheap to replace but costly to ignore, we keep C3939352 in stock and check every piece against the original Cummins specification before dispatch. A leaking suction joint can pull air into the oil circuit and shorten bearing life, so we recommend replacing the gasket whenever the pipe is disturbed. Add the family number C4898301 to the same order if you are stocking spares, and we will consolidate shipping to a single tracked delivery.
Racer Machinery is a dedicated construction-machinery parts supplier — send us your part number and engine model, and we will confirm fitment, price and lead time for the sealing gasket and related Cummins lubrication-system parts.
