Broken coolant reservoir overflow tube help needed! - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 34 (permalink) Old 02-16-2018, 03:19 PM Thread Starter
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Broken coolant reservoir overflow tube help needed!

Argh!!

Upon inspecting the coolant overflow tank due to rusty paste contaminating the interior of it I broke the nozzle on the upper overflow (return?l hose. Found a replacement tank with hoses on eBay since the dealer doesn't carry them anymore due to being older than 10 years. Yay.

Will any kind of tape make for a temporary fix until the replacement arrives? The break is where the square part meets the nozzle cylinder.
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post #2 of 34 (permalink) Old 02-16-2018, 03:20 PM Thread Starter
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would crazy glue work?
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post #3 of 34 (permalink) Old 02-16-2018, 04:03 PM
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Yeah, they're bad about that. Most common way to break them is when you put that side fairing back on.

I don't think you can repair that fitting - it's injection molded plastic ("nylon"), and really old. I replaced mine years ago with a similar-looking item from a laboratory kit.

Until you find a replacement, you can use a longer tube that curves into the bottom of the tank, and then put some silicone caulk or some other flexible gunk at the tank penetration.

You might find a 90 tubing connection at the local auto parts store. Here's the Grainger page: https://www.grainger.com/category/ba...ecatalog/N-qvx.

It's not a critical break - it's the radiator 'overflow' hose, so there's no pressure on it. Sealing the hole just helps keep the leaking to a minimum. The end of the hose must remain at the bottom-ish of the tank, though.
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Last edited by pushr0d; 02-16-2018 at 04:05 PM.
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post #4 of 34 (permalink) Old 02-16-2018, 05:44 PM
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Take the old one with you into a hardware store.
They'll have a brass replacement for around two bucks in the plumbing section.
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post #5 of 34 (permalink) Old 02-16-2018, 11:27 PM
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What Steve said. The brass won't break like the plastic. There's a separate hose that goes to the bottom of the tank from the end of the elbow inside the tank.

Cheers,
-Kit
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post #6 of 34 (permalink) Old 02-17-2018, 02:24 AM Thread Starter
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Ooh the brass fitting is a great idea. I'm hoping needle nose pliers will get the elbow out. Sorting it out tomorrow. Hopefully my truck battery is recharged as well so I can actually get to the hardware store. It's been a week....
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post #7 of 34 (permalink) Old 02-17-2018, 08:23 PM
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FWIW, that hose is not a deal killer for riding short distances.

Cheers,
-Kit
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post #8 of 34 (permalink) Old 02-18-2018, 12:19 AM Thread Starter
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Thank for the assurance, I'm hoping it'll hold out until the replacement comes Friday.
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post #9 of 34 (permalink) Old 02-19-2018, 06:17 PM Thread Starter
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the service manual recommends using a handheld vacuum pump to "syphon the coolant through the system" so that the coolat passes through the cylinder and not just from the filler opening on the other side of the thermostat.

i have a speed bleeder that i use for my brake lines. is there any problem with residual brake fluid getting in the coolant lines by using it?

i'm more concerned now about the fluid leaking from my hoses like in the photos. the larger coolant hose seems to be swelling slightly at the clamp. time for replacements or will a thorough system flush be enough?
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post #10 of 34 (permalink) Old 02-20-2018, 01:49 AM
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The hoses are spec'ed for replacement every two years, IIRC. Maybe every four. Silicone hoses last much, much, longer. These AS3 hoses are what I run.

Cheers,
-Kit
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