View Single Post
Old 01-06-2018, 07:29 PM   #3
Grumpy old man
Senior Member
 
Grumpy old man's Avatar
 
Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
Re: 71 350 running hot coolant backup up problem

Ummm, why are you leaving the cap off ? before you reinvent the wheel let it cool completely then try adding a gallon of straight anti freeze, clean water till full and using a new radiator cap you should be fine . It's a pressurized system ,No cap no pressure .
Grumpy old man is offline   Reply With Quote