Upper Radiator Hose plastic piece
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Junior Member
Joined: Nov 2017
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From: Austell, GA
Upper Radiator Hose plastic piece HELP
? - The plastic piece on my upper radiator hose broke off connect the coolant tank overflow - any suggestions without have to buy a whole new hose? Don't have the $ right now
Last edited by jagstype2004; Nov 18, 2018 at 03:06 PM.
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Joined: Oct 2012
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From: Oregon
Veteran Member
Joined: Oct 2012
Posts: 4,906
Likes: 2,314
From: Oregon
i highly doubt any kind of repair will hold up.
A threaded fitting into a plastic housing isn’t a good repair. That type has tapered threads that seal by wedging into the hole. Works great into a metal housing. In plastic, this outward force will eventually crack the housing. The only question is when it fails, not if.
I wouldn’t trust any kind of epoxy (or other adhesive) repair, either. Even if you drilled out the housing and inserted a piece of tubing, the adhesive bond is still subject to pressure, heat cycling, and chemical attack. Plus, the housing is now thinner where it was drilled out. Not a recipe for longevity.
Such a critical component isn’t the place to take a shortcut. You don’t want to see a coolant cloud on a long bridge or other place where you can’t safely pull over. In my highly overrated opinion, do it right or wait until you can. Don’t skimp on something that can easily turn your engine into an expensive paperweight. The risk/reward ratio doesn’t work in your favor.
A threaded fitting into a plastic housing isn’t a good repair. That type has tapered threads that seal by wedging into the hole. Works great into a metal housing. In plastic, this outward force will eventually crack the housing. The only question is when it fails, not if.
I wouldn’t trust any kind of epoxy (or other adhesive) repair, either. Even if you drilled out the housing and inserted a piece of tubing, the adhesive bond is still subject to pressure, heat cycling, and chemical attack. Plus, the housing is now thinner where it was drilled out. Not a recipe for longevity.
Such a critical component isn’t the place to take a shortcut. You don’t want to see a coolant cloud on a long bridge or other place where you can’t safely pull over. In my highly overrated opinion, do it right or wait until you can. Don’t skimp on something that can easily turn your engine into an expensive paperweight. The risk/reward ratio doesn’t work in your favor.
Senior Member
Joined: Jan 2010
Posts: 209
Likes: 22
From: Wilton CA
I could not agree more; there is nothing that you can do here for a lasting repair. The plastic has a finite life-span and replacement is the only viable long term solution.
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