Review on 🖤 Stant Radiator Cap - Upgraded Design in Sleek Black, Size 18 by Julian Davidson

Designed for use on circuits where glycol is prohibited as it is too slippery when the radiator is torn. Exceeding specification by 2 lbs is safe as long as your system is intact. 2 lbs will reduce overheating by 10-15 degrees. The aluminum radiator did the same. Why. I had a mysterious overheating issue which I FINALLY found out after fixing everything else, so much for all the experienced mechanics on google searches. Here it is: Waterhammer showed no outward signs of distress. The water flowed well. BUT the lousy plastic impeller ripped off. Turned under 40 mph but stopped pushing water at cruising speed.