Upper Radiator Hose

[tnt31]

2000 Dodge Durango w/5.2L with 256K miles

Just had the OEM (second one) upper radiator recently let go. The OEM hose is one piece with the filler neck built into it approximately in the middle. Instead of getting another OEM hose I got Dayco 72046 and 72047 hose and a new filler neck and installed. It saved a few bucks from the OEM but mostly did it out of convienence plus local dealer did not have it in stock and I wanted to fix it that day. (It could have waited but....) The OEM hose had a spring that ran thru the length of the hose. The new hoses did not have a spring so I have assumed not needed and installed the new hoses with out the spring but am now second guessing myself although so far (just two days) no problems. I have had it to temp a few times but no prolonged runs.

Thoughts?

 

[david_ES2]

I would of took the spring out of the old one and put it in the new one if it was possible

 

[Cristobal]

Those springs are to keep the hose from collapse I think, but with a lot of hose designs they might not be needed.

 

[Tegger]

Originally Posted By: Cristobal
Those springs are to keep the hose from collapse I think, but with a lot of hose designs they might not be needed.

Springs are usually installed into hoses that are subject to considerable suction (the rad hose that feeds the water pump is the suction-side one). Under certain circumstances, the suction-side hose can collapse flat unless held open by the spring. This collapse can cause momentary overheating.

I'm not at all familiar with Chrysler's setups, but there's got to be a reason Chrysler put a spring into that hose. The domestics never put a single extra penny into anything even if it would be better if they did, so that spring must be important. Maybe the aftermarket uses a stiffer carcass instead?

 

[Chris142]

No need for a spring in the upper hose. Your fine.

 

[Thax]

Newer EPDM hoses generally do not need the spring to prevent collapse under high load. I suggest and personally just transfer the old spring to the new hose , its easy and eliminates the possibility of suction collapse .