yes, all passages are clear, no gunk, all the way from bottom of pick up straw to rad neck.

the hose is extremely plyable, maybe it is worn down, after all, it is a 10 year old hose.

I have had a slight issue with air in the cooling system, could a weak hose cause that or would air in the system cause the hose to flatten?

thanks for all the input guys.

97 Montero SR w/Mitsu Adj Shocks & Rear Diff Lock ARB Front Diff Lock 4.9 Ring/Pinion 3.15 transfer box 43:1 crawl ratio 2" suspen lift 2" body lift 2" Gas Tank Lift 35x12.5 MTRs 15x10 Wheels Rock Sliderz ARB front bumper w/12k winch Custom rear bumper