Overview – TURBO OIL DRAIN CONNECTION 3934085
For Cummins turbocharger positions as the oil-drain connection returning oil from the turbo, the Cummins TURBO OIL DRAIN CONNECTION 3934085 provides the correct fit and performance expected from a genuine-spec replacement.
Parts Characteristics
An oil-drain connection that returns the turbo’s oil to the sump, so the bearing is not flooded and the seal is not pushed out by back-pressure. It carries the return that keeps the centre housing dry, so a true, clear drain keeps the turbo from smoking at idle.
Applicable Models & Applications
Used at Cummins turbocharger positions specifying this oil-drain connection. Match the flange, the bore and the route against your old connection – turbo drains differ in how they return and seat.
Maintenance & Replacement
Inspect for a leak at the joint and a blocked return at every turbo service. A connection that has begun to weep or plug backs oil into the bearing, and the backup is what smokes the seal.
Confirm the drain runs clear and down to the sump on fit. A drain routed with a high spot traps oil and the centre housing floods.
Replace the seals together with the connection where the kit calls for it. A new drain onto a crushed old seal still leaks, and the leak is what marks the bay.
Keep the correct turbo oil-drain connection for your engine on the bench. It is cheap, it protects an expensive turbo, and it is exactly the part missing when a return needs feeding today.
Price Reference (USD)
The TURBO OIL DRAIN CONNECTION 3934085 generally falls in the USD 10-60 bracket, with expedited freight quoted separately.
Value & Service
We supply brand-new Cummins turbo oil-drain connections with the flange confirmed against your turbo, so the return stays clear.
Racer Machinery ships the Cummins TURBO OIL DRAIN CONNECTION 3934085 to over 100 countries, with packaging built for the rough handling of international freight.







