Review on Zerostart 3100055 Engine Block Heater: CSA Approved, 120V, 600W for Chrysler, Dodge, Jeep, Kia, Mitsubishi, Hyundai by Jerome Pernell

I installed this on an old airport tractor with a Chrysler Flat 6 engine. The hardest part was inserting the retaining flange or vanes into the inner ring and then expanding to hold the heater. It didn't fit completely onto the outside edge of the plug, but the o-ring went into the block and the plug fits snugly against the inner ring. If that all makes sense. Short answer, it worked, no drips and I'm happy.