closed system?

[Kickinmule]

So this '88 chief 4.0 has the closed cooling sytem? i gather its called that because there is no radiator cap. Yes i'm that inexperienced. So question is, as I make ready for first ignition, how do i judge how much water/coolant is in the system? also should i be concerened about the contents after the truck has been sitting for over a year w/o being started?

[Eagle]

At the top of the firewall on the passenger side there's a plastic, lozenge-shaped bottle with a cap on it. That's the coolant reservoir. It is also pressurized when running, and serves as an expansion/surge tank. THERE IS NO OVERFLOW ON THE CLOSED SYSTEM.

 

The reservoir should be filled halfway when cold. Look inside and you should see a post with a notch cut in it. Fill to the notch.

[cruiser54]

Yessir. And if that caps turns out to not hold pressure, replace it with a Napa 703-1396. 

[kook911]

Yessir. And if that caps turns out to not hold pressure, replace it with a Napa 703-1396.

 

Just asking is there a way to tell if the system is hold pressure or not?

[cruiser54]

 

Yessir. And if that caps turns out to not hold pressure, replace it with a Napa 703-1396.

Just asking is there a way to tell if the system is hold pressure or not?

 

Yep. It will get hot and spit coolant out around the cap.