Captain Hook

i sent you a pm

ok one thing i noticed also is i can pinch together the upper radiator hose while it is running with the cap on and cap off also ... its like i have no pressure in it at all

the guage only goes to the middle section of cold - 220 and will not go any higher than that .. but it will drop when i turn the heat on ... i thought you would feel the upper hose pressure when you pinch it...and the Blazer doesnt overheat ... the radiator fluid doesnt do anything when you rev the motor it just sits there

suggestions/thoughts?

 

Could be an air bubble trapped and the system needs to be bled/burped. That would make sense if you have a coolant leak Seems like there's a thread on here that tells how to burp it.