Aluminum Coolant Thermostat Bung Adapter for BMW E46 318d 320d 330d
Keep your BMW diesel running cool under pressure with this CNC-machined aluminum coolant thermostat bung adapter. Replaces cracked or stripped fittings without forcing you to purchase complete replacement assemblies. The precision-cut design bolts directly to the factory mounting point for a clean, leak-free seal that survives daily road vibration.
Benefits & Tips
- Direct swap fit: Aligns with original bolt patterns, cutting down labor time and avoiding unnecessary part replacements.
- Turbo longevity: Channels fresh coolant straight to the thermostat housing to lower inlet temps and keep turbo passages clear.
- Pre-install prep: Wipe the mating surface with brake cleaner and inspect old gaskets for smooth torquing.
Product Specifications
- Material: Solid aluminum billet, silver finish
- Part identifier: BOP40
- Compatible platforms: BMW 1, 3, 5, 7 series, X3, X5, and X6
- Engine code match: M47, M47N, M57, M47N2, M67, M47R
- Fuel system: Diesel engines only
Package includes: one aluminum coolant thermostat bung adapter
Installation note: This component ships without written guidance. Professional fitting is strongly recommended, and experienced hands should manage the removal and torque sequence. Cross-check your chassis designation and production year before ordering.
© English information sheets included.
All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.
Maintains steady heat rejection during stop-start city routes or mountain passes, letting you trust your gauge cluster mile after mile.