[diesel freak 123]

Have anyone ever noticed if their upper radiator hose collapses after the engine has been shutoff for about 5 hours? Well I noticed mine does but ,when I crack open the coolant tank cap it relieves the vacume on the hose is this normal??? 2004 Chevy LB7 bone stock..

 

[diesel freak 123]

Well from what I have heard from other message boards is change out the coolant cap . So thats what I'll try.