Lower Radiator Hose doesn't have a coil spring

[1972RedNeck]

Originally Posted by Rufas

Wanta bet?

The upper hose on my 468 BBC will suck the upper radiator completely flat at high RPM. How do I know? When test driving the 468 right after the install I left my hood off. The hose would collapse flat as a pancake.

My fix (don't know if it's correct) was to replace the hose with a flexible stainless steel hose. No more collapsing.

Your top hose is collapsing? Sounds interesting.

Here's one for all of you - when the hose collapses, it displaces fluid, correct? If the system is full of liquid (which is non compressible for the pressure we are talking about) with a tight cap, where does the displaced fluid go? Magically disappear at high RPM and then reappear when you take your foot out of it??