I converted a 4cyl mustang into 5.0 with rebuilt 302, about 2 years ago. Every since I got it running, it has been having overheating problems, mainly in spring and summer months. Happens while driving on highway and in slow moving traffic. I have replaced water pump, t-stat with 180, radiator cap with spring release, bought new 2 core radiator from o reilly back in 2005, flushed radiator out, replace hoses, installed proform 16 in electric fan, and burped cooling system. Timing is set at 10 degrees advanced before top dead center. No matter what I do, when the weather is above 70 degrees, temp gauge will go to 180, 210, 230, 250 while driving. Stays at 180-200 idleing in driveway. One thing I did notice after flushing, have brown liquid in radiator. I'm thinking my water jackets and engine block may have rust and corrosion. IS there anyway to clean block and water jackets, like at radiator shop or something performance shop can do .
Any advice or recommendations!!!!!!!!!!!
Any advice or recommendations!!!!!!!!!!!