No after installing the 216 water pump with the adaptor ,I did on my 55/235 I just put in my 52-3100 you use the harmonic bal. from you're 216 because if you use the 235 bal. you'll over rev. the water pump it's in the instuction sheet that comes with the ad. I ran that combo for about 1000 miles with no problem at all,and the engine stayed at 180 degrees ,sadly I've put her away for the winter now because Il. uses ALOT of salt.Also if you use the ad. if you break down with a bad water pump you can use a stock 216 pump and get one at any FLAPS they will have to order it but it's a stock item.
Pete
