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When my engine cools down, I find radiator return hose collapsed. What would cause this? Radiator cap is about year old. Is this going to cause issues? Coolant level looks good.
If the coolant return system isn't flowing back to the radiator somethings gotta collapse. Could be the cap.
Does the hose return to shape when you remove the cap?
Sic friatur crustulum
'84 GW with Nissan SD33T, early Chev NV4500, 300, narrowed Ford reverse 44, narrowed Ford 60, SOA/reversed shackle in fornt, lowered mount/flipped shackle in rear.
Just to verify, your not losing coolant. If so might be head gasket sucking fluid and causing vacum in system. If not leaking might be air in system. When hot air will expand but when cools down will take up less space and cause lower pressure and cause hose to collapse. My first call is to replace lower hose. If air in system this might clear it.
1980 Cherokee,360/727/208, propane powered,unknown lift,31' Adventuro's on Chevy rims,Warn winch
1980 J10,360/standard/208, stepside
1970 GMC 4X4 Pickup, 78 frame, 84 350, Turbo 350/205, patina galore
1986 Blazer K5, 350/205/465 trans
1990 Cherokee XJ, about to scrap for FSJ parts, gone to parts graveyard in sky
'84 GW with Nissan SD33T, early Chev NV4500, 300, narrowed Ford reverse 44, narrowed Ford 60, SOA/reversed shackle in fornt, lowered mount/flipped shackle in rear.
I am. It lets fluid flow into the overflow tank as the engine heats up and pull it back as it cools.
Sic friatur crustulum
'84 GW with Nissan SD33T, early Chev NV4500, 300, narrowed Ford reverse 44, narrowed Ford 60, SOA/reversed shackle in fornt, lowered mount/flipped shackle in rear.
I would definitely look at the radiator cap but I had something slightly different happen to my Jeep. At idle, the lower rad hose was fine. When I revved it up, I saw the hose collapse. The water pump moving fluid faster was collapsing it. I got a new hose with an internal spring and haven't had this problem since.
My Stable:
1984 Jeep Grand Wagoneer, 360 V8, Auto, SelecTrac
1987 Jeep Cherokee (XJ), 4.0L I6, Auto, Selectrac
And a few more....
It’s been a while since I had this issue but I wanted to update on what happened. I looked at the cap closely and moved vacuum valve by hand. It was a bit of resistance when pulled on it. I got it to move freely and collapsing issue is resolved. Maybe it jammed in the winter months. I will keep an eye on it this fall as I hate just swapping out parts.