colapsed radiator hose

[phil conrad]

I recently replaced my radiator,thermostat , cap and hoses. I also did the jabsco intercooler pump at the same time if this matters. Almost from the start I noticed that my truck seemd to run a little hotter. After looking around I noticed that my upper radiator hose was colapsed. I thought that I had purchased a defective hose. So I purchased a new GM hose. It has taken longer to happen but it is also collapsed. What is odd with this one is that the truck is not running hot. Does any one have an idea as to what is going on ?


Thanks

 

[Lynn D. Brown]

Rad hoses

Rad hoses

Phil,

The only reason I can see for collapsing your upper hose is if U R somehow pulling a vacuum. The 1st thing I would think of is a bad thermostat. These can somtimes be bad from the factory. U can check it by putting in a pan of boiling water on the stove if U have a thermometer. I've found a few bad ones that way. I try to get the HD Hi Flo thermostats.

 

[leroy]

Bad thermostat or thermostat installed upside down.

If it does it as the engine cools off, replace the radiator cap.

Jim

 

[Bill Z]

colapsed radiator hose

If you have not figured your problem out yet, I have some suggestions.

The radiator caps have an important roll in the cooling system. They will allow over pressuring to spill out into the overflow bucket. When the engine cools down, it is suppose to allow the overflowed coolant to be sucked back into the radiator. If the engine cools and the vacuum is not allowed to suck back the overflowed coolant (or air) the hose will collapse.

Sometimes oversized radiator caps can help and some times they won't.

Check the cap's size and also, see if it is working properly. A radiator shop can check it for you.

Good luck. Being down is not fun.

 

[phil conrad]

Thanks for all of the tips. Well I think I have fond my problem. Operator error This morning the hose was flat again. After removing the cap it "magically" un flatened itself. I had pinched the small hose to the over flow tank. So far so good. I guess I will find out for sure once it has totally cooled down.