The factory coolant bleeder screw on many BMW models is an infamous weak point—a tiny component with the potential for catastrophic failure. Exposure to relentless heat cycles causes the plastic to become brittle and prone to cracking, even under normal driving conditions. For this reason, our existing HPS Titanium Coolant Bleeder Screw is a small but mighty upgrade: a relatively inexpensive, preventative measure that ensures the reliability of your entire cooling system.
The plastic is known to crack spontaneously, or more likely, to disintegrate in the housing whenever you need to remove it for a simple coolant flush or repair. To combat this critical vulnerability, we precision CNC machine our replacement from Grade 5 aerospace titanium, a material guaranteed never to fail under the cooling system's extreme heat and pressure. This titanium screw is coupled with a chemical-resistant Viton O-ring for a superior seal, ensuring longevity and durability, which provides peace of mind for daily commuting and track days alike. To improve ease of service, we designed the screw with a 4mm Allen head, eliminating the awkward large crosshead found on the original design that’s prone to stripping.
Part number: HW22-1001