Aluminum Thermostat Bung Removal Kit For BMW 1 3 5 7 Series
Restore proper engine cooling efficiency without replacing expensive housings. This aluminum therma valve bung replacement kit is engineered specifically for a wide range of BMW chassis, including the 1 Series E87, 3 Series E90–E93, 5 Series E60–E61, 7 Series E65–E66, X3 E83, X5 E70, and X6 E71. When the original thermal switch bung leaks or fails, these kits provide a direct, factory-compatible substitute that restores a secure seal around the radiator thermoblock.
Crafted from durable aluminum, each component resists heat cycling and coolant corrosion better than fragile plastic OEM equivalents. The design allows you to swap out just the defective valve or bleeder port rather than purchasing a complete cooler assembly, saving time and reducing unnecessary waste.
Benefits & Practical Tips
- Targeted Repair: Use this kit to isolate and fix specific fluid leaks at the thermostat housing, avoiding full radiator cooler replacements.
- Safe System Bleeding: Install the included bleed screw into the vented blanking plug to methodically purge trapped air from the cooling circuit during regular coolant changes.
- Long-Term Sealing: Always seat the supplied O-ring cleanly and verify thread alignment before torquing to prevent recurring high-pressure leaks.
Product Specifications
- Material: machined aluminum alloy
- Model Number: BOP40
- Fitment Range: BMW 1 Series (E87) | 3 Series (E90, E91, E91N, E92, E93) | 5 Series (E60, E60N, E61) | 7 Series (E65, E66) | X5 (E70) | X6 (E71) | X3 (E83, E83N)
- Seal Type: dedicated rubber O-ring for leak-proof mounting
Package Includes
- 1 x solid blanking plug
- 1 x vented blanking plug
- 1 x bleed screw (designed to screw into the vented blank)
- 1 x replacement O-ring
Installation Reminders
Always perform replacements on a completely cooled engine and disconnect the battery before working near electrical sensors. Clean mating flanges of old gasket residue to ensure flat contact. Inspect internal threads for cross-threading damage before final tightening.
All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.
Serving European drivers with dependable repair solutions via intercyprus.com since 2002 — precision parts backed by consistent standards.
