Mercedes-Benz GLA 250 PCV Valve, Thermostat, Intake Valve Cleaning!

⚠️ IMPORTANT WARNING: Make sure no coolant or oil gets on or in your alternator or belt during this job! It can cause it to short and fail. In this video, we are doing a complete step-by-step DIY for the 2017 Mercedes-Benz GLA 250 (M270). We cover the intake manifold removal to perform a chemical soak carbon cleaning on the intake valves, and replace the thermostat, timing chain tensioner, upper and lower radiator hoses, and the upper coolant expansion tank hose. We are also attempting a $100 OEM MB PCV valve splice to save myself from having to buy the entire $1,000 OEM crankcase ventilation system / crankcase breather assembly (MB part # 2700900700). This is a fix for Check Engine Fault/Code P052E71 (Positive Crankcase Ventilation Regulator Valve Performance: The valve for crankcase ventilation has a malfunction. The actuator is blocked) P0128 (Coolant Temperature Below Thermostat Regulating Temperature) P0300 (Random/Multiple Cylinder Misfire Detected) This video serves as a DIY fix for common Mercedes engine codes: P052E71, P0128, P0597, and P0300.* If you own a Mercedes GLA 250, CLA 250, or any M270/M274 engine vehicle, this video shows exactly what to expect when performing this major service yourself in your own garage. If this video is helpful, please don’t forget to like, subscribe, and leave any questions in the comments! As an Amazon Associate I earn from qualifying purchases. Every highly rated tool linked below is one I bought with my own money. I'm sharing them because I personally use them in my own garage, and they genuinely made this job a lot easier. 🔧 Products and Tools Used: Carbon Intake Cleaner: https://amzn.to/4wUtcvl Hose Clamp Pliers: https://amzn.to/4fbY2to Shop Vacuum: https://amzn.to/4fnGysN Valvoline G40 Coolant: https://amzn.to/459mWDV Autel Scanner Tool: https://amzn.to/3Rkepe9 Engine Oil: https://amzn.to/4gLNTVx Engine Oil Filter: https://amzn.to/3SPdBys or https://amzn.to/4y7N3IR Impact Wrench: https://amzn.to/3SFLIsy Impact Socket Set: https://amzn.to/44joY48 Cordless Ratchet (with battery): https://amzn.to/44Rse6P (Or without battery): https://amzn.to/4b0ZWdV 1/4 Torque Wrench: https://amzn.to/4p8dTwe 3/8 Torque Wrench: https://amzn.to/4pblGt9 1/2 Torque Wrench: https://amzn.to/3SNM28I (Or All Three Torque Wrenches): https://amzn.to/44DtvP7 Drain Pan: https://amzn.to/4vmVMUF Jack Stands 3 ton: https://amzn.to/4pbjpyc Oil Spill Mat: https://amzn.to/4eYNhcl Shop Towel: https://amzn.to/44RzH5X ⚙️ Services Performed: Intake Manifold Removal Intake Valve Carbon Cleaning (Chemical Soak) OEM PCV Valve Line Splice Thermostat Replacement Timing Chain Tensioner Replacement Upper and Lower Radiator Hose Replacement Upper Radiator Expansion Tank Hose Replacement Coolant Drain and Refill Engine Oil and Filter Change 🔩 Important Torque Specs (M270 Engine): T25 Throttle Body Bolts: 80 in-lbs (9 Nm) - Do not over-tighten into plastic! 13mm Oil Drain Plug: 22 ft-lbs (30 Nm) 13mm Battery Tray Bolts: 15 ft-lbs (20 Nm / 177 in-lbs) E14 Engine Mount to Chassis: 42.8 ft-lbs (58 Nm) E18 Engine Mount Bracket to Engine: 78.2 ft-lbs (106 Nm) 17mm Wheel Lug Bolts: 96 ft-lbs (130 Nm) Chapters: 0:00 Overview 3:08 Removal Of Parts 12:59 Coolant Drain 14:42 Upper Expansion Tank Coolant Hose Replacement 15:59 Upper Radiator Hose Replacement Fail 17:18 Lower Radiator Hose Replacement 17:57 Removal Continues 20:09 Reinstallation Begins 21:54 Intake Valve Carbon Buildup And Removal 27:12 Timing Tensioner Bolt Replacement 28:00 Windshield Wiper Replacement 28:42 Reinstallation Continues 33:34 Coolant System Refill 34:42 First Startup 34:48 Warmup And Personal Thoughts 35:24: Oil Leak 36:00 Engine Oil And Filter Change 35:51 Clearing Stored Faults 37:34 Important: Timing Chain Tensioner Bolt Cap/Seal! 38:57 Outro