Quote Originally Posted by nitrowarrior
You will always see a cooler temp at the back and hotter in the front unless you have a weird problem.
Huh?? I think that's backwards... On a conventional small-block Chevy (which Don has and I also have in my coupe) the water pump pushes coolant directly into the front of the water jackets. By the time that coolant makes it to the rear of the block it is VERY HOT! If you notice where GM put the temp sending units in Chevy engines, it is either in the front intake manifold water passage or in the left head between #1 & #3 cylinders where it sort of reads an "average" temperature. I made the mistake of putting the temp sender in the right head between #6 & #8 when I first got my coupe running and the temperature went up and down like an elevator. It was always reading between 210 and 260 with a 160 thermostat! I changed hoses, water pump, radiator, thermostat (twice), and the fan; nothing helped. Finally a friend of mine spotted the problem right away - he said "move the sender and your problems will be solved". He was right.