Installing New BMW E87/E90 Coolant Hoses & Cleaning Fittings (What Nobody Tells You!)

NEW COOLANT HOSE INSTALLATION & CONNECTOR CLEANING ON BMW E87/E90 | PREVENT LEAKS! Hi everyone! In today's tutorial, we wrap up the complete installation of the cooling system hoses on the BMW 1 Series (E87) and 3 Series (E90). I’ll show you step-by-step how to properly clean off scale build-up and residue from the plastic and metal fittings to leave the surface silky smooth, preventing coolant leaks caused by an improper seal. Plus, I explain why you should NEVER use mineral grease or penetrating oil on EPDM rubber, and why silicone spray is the only 100% safe option to avoid pinching or biting the internal O-rings. 🛒PURCHASE LINKS & TOOLS USED: •♦️Upper radiator hose 17127565091: https://amzn.to/45L8lyL •♦️Microfiber cleaning cloths | Pack of 8: https://amzn.to/4ghfUTU •♦️Socket and screwdriver bit set, 130 Pieces: https://amzn.to/4c6axVc •♦️Silicone spray 400ml can: https://amzn.to/4ylfhPJ •♦️ Radiator coolant hose 17127521361 (Engine to Radiator hose for E81 E87): https://amzn.to/4gBMIAc (Note: Purchasing through these links helps support the channel with a small commission at no extra cost to you). IN THE NEXT EPISODE: In the next video, we'll cover the crucial step before starting the engine: proper coolant bleeding to prevent air pockets and cylinder head overheating. We'll also analyze the different types of coolant on the market and which one is ideal for your BMW. Don't forget to subscribe and hit the notification bell so you don't miss it! TOOLS AND PRODUCTS USED: • Brake cleaner (for degreasing fittings) • Silicone spray (100% safe for EPDM rubber and plastics) • Soft cleaning brush / Microfiber towels • Water & dish soap mixture SUPPORT THE CHANNEL: If this video helped you out and you enjoy DIY auto repair content: Give it a LIKE Leave your question or comment below SUBSCRIBE and share it with fellow car enthusiasts! #BMW #BMWE90 #BMWE87 #DIYMechanic #Er_elautentico #BMWHoses #BMWCoolingSystem #CarMaintenance #AutoDIY