Can an engine run too cool????

[sacred_piston]

I have a 67 chevy C-10 with a 72 350 4-bolt main and I was having overheating problems so I figured out it was rad since everything else is new. I was running in city traffic on scorching hot day upwards of 225 degrees (not moving) with 185 thermostat. I bought an aluminum rad and dropped stat to 160. Problem solved I am running steady 155-160 on really hot day sitting in alot of traffic it went to 180. Can it be bad to run at a low temp like 155-160? Someone told me it is. If so I was going to put the higher 185 stat back in.

[Mutt]

Yes, it is bad to run too cool. Use a 180 thermostat. The motor needs to warm up to be efficient.

I would also suggest that you post questions pertaining to cars on the Hokey Ass Message Board, as THIS forum is for questions about the operation of the board, not cars. It would also be advisable to give an intro on the HAMB, as I see you haven't done yet.

Mutt