I have changed the bellows,gimbal bearing ,water pump hose and shift cable on my 2001 Chaparral sse 180...got thru it and it all works....many thanks to all who replied and posted their insights for me...My temp reading has always been around 180 ...I changed thermostats,impellor,and just put in a new sender...still 180 but new sender responds much more quickly than the old one ...infra red gun readings at the sender read 159 -165 ...what am I missing here?