Topic: do I need a spring in lower radiator hose
in Forum: C3 Cooling and Heating Systems
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Yes, the lower one is more important, but sometimes both are needed. Some don't need either one.
kstyer 2006-09-21 17:50:25
If your hoses are collasping, you may want to also check the radiator pressure cap. If it's not holding pressure the hose will collaspe easier. This does not mean it won't if it does hold pressure, but it's less likely.
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Ten15, thanks for the offer to send me your spring. My old one had a spring, so I will use it. It looks in OK shape. Thanks again.....
steves74 2006-09-22 08:50:34
Also another question. the "universal" radiator hoses as opposed to the premolded ones probably do not need a spring since they are a lot stiffer.
To everyone else.....thanks for the input.
PS. Orginally I was going to purchase the SS braided hose, but could not find any long enough for the lower hose. Has anyone found one??

Steve, Lifetime Member #129
74 coupe 4 speed 350, 54K actual miles,
all original; paint, interior, engine,
split bumper. #'s match. 2nd owner, no stress cracks.
Definitely go with a spring in the lower hose.
If you are not concerned about having the car judged, ask your NAPA dealer for the ribbed heavy duty hose in the length you need. We put these on the upper and lower with no issue whatsoever and as I remember the lower cost fewer than ten dollars US. These are manufactured straight in shape, however are flexable enough to negotiate the tight turn without coming in contact with the frame.
The rationale for changing from (New OEM lower hose) was that we observed that when the throttle was pulled back on the carb significantly, the lower hose CRUSHED and collapsed on itself for a second or two. This was one of many inexpensive things that eventually cooled our system down.
JB
in Forum: C3 Cooling and Heating Systems
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