Originally Posted by Sweet-34
Can someone enlighten me as to drill or not to drill holes in the 180 degree thermostat on a 327 Chevy Engine. Been running a 195 degree thermostat and it runs too hot. I'm running a manifold fan sensor that turns on my fan at 200 degrees and cools to 185 before shutting off. Most people tell me to drill 3 small holes in the stat before installing.
If so......what size holes? Also, what is the benefit of doing this?
as was suggested,a good fan shroud forces air to be pulled thru radiator.larry nice rod