Radiator cap leaking - MVAgusta.net
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post #1 of 14 (permalink) Old 12-05-2019, 01:06 AM Thread Starter
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Radiator cap leaking

OK guys, the cap on my 2018 f3 800 leaks, i tried to bend the tabs, ears in a little to help it tighten down more, it helped slow it down but still leaks. i took it in for a warranty issue but it was denied 3 times they said. so i need a new radiator cap, any suggestions? i found the MV MOTOR CORSA parts, and another site saying genuine MV parts but at 67euros 05 57 pounds, there has to be something thats not $80-$100 to my door.any one know of an aftermarket one? is it one size fits all type of thing ?
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post #2 of 14 (permalink) Old 12-05-2019, 01:20 AM
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Hi James,
Try this for reference:
https://shop.startwintrading.com/en/...ing-system-182

Part no. 23 8000B6019 RADIATOR CAP 1 20.13 $22.31

If you needed it shipped the price can't be all that bad. Check US dealers using that part number.

Another search:
https://www.bike-parts-mv.com/mvagus...arts/8000B6019

Thread on caps:
https://www.mvagusta.net/forum/129-m...iator-cap.html
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post #3 of 14 (permalink) Old 12-05-2019, 01:21 AM Thread Starter
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Thanks Edward, just went to the site and it seems the shipping is twice the cost of the part, maybe i can find something in the states. i really appreciate the help though.



checked out sparks thread and i'm gonna look for the KTM part, you know if most of you guys were closer i would ride around delivering a couple beers or cheese cakes for all the help.

Last edited by himystein; 12-05-2019 at 01:32 AM.
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post #4 of 14 (permalink) Old 12-05-2019, 01:27 AM
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Quote:
Originally Posted by himystein View Post
Thanks Edward
You're welcome. The listed MV thread notes using a KTM cap. You can always reactivate that thread for any followups.
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post #5 of 14 (permalink) Old 12-05-2019, 02:07 AM
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Take your cap to your local radiator specialist and ask him to test it. You'll find it is common with a lot of cars.
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post #6 of 14 (permalink) Old 12-05-2019, 06:58 AM
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Radiator caps are radiator caps .... (except for the first gen bikes with their bottle cap type).

Common sizes and pressure specs are used on almost all vehicles. Bike manufacturers buy them from the cap manufacturers catalog based on pressure specified by the design engineer.
No one has a "special" radiator cap made for just their bike.
Head to an auto parts store. Look for one with slightly higher pressure rating if that is what you need.

Any decent auto shop and many parts stores can test your cap.
Why would warranty be denied if there was a defective part? Are you over filling your expansion tank causing overflow ?

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post #7 of 14 (permalink) Old 12-06-2019, 01:42 AM
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himystein;
Go to your local AutoZone.......they probably have the radiator/radiator cap tester.....they should have the correct cap

Ed;
Manufacturers very often specify weird radiator caps and oil filters like Suzuki's M20x1.0 filters, that NOBODY ELSE USES

The World used to be simple
There used to be 2 sizes A for cars and B for trucks

I have 4 adaptors for the 45mm caps and radiators and there different gasket heights too
Page out of the SnapOn catalogue showing all the adapters
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Last edited by theknurl; 12-07-2019 at 06:01 AM.
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post #8 of 14 (permalink) Old 12-06-2019, 02:43 PM Thread Starter
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No, not over filling, the cap would leak untill the overflow was empty if the engine was warmed up. with the right fairing off i could see it was just dripping from the cap and the inside of the fairing had dried coolant on it like it sprayed out, bending the "ears" on the cap helped but it still drips and smells like coolant when i ride and the overflow tank will drain out in 4-5 days instead of 2. i guess the tech said they had to pressure test the cap, not sure why they couldn't do that but i'm not gonna argue, my brutale still has a warranty claim for the exhaust valve, i guess the fix for that is to re-adjust the valve position to see if that helps. hope so, waiting for a new servo doesn't sound like fun.
i just went ahead and found 2 KTM caps and when they get here check them out.
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post #9 of 14 (permalink) Old 12-06-2019, 02:47 PM
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Does the cap use a rubber gasket. If so try finding one
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post #10 of 14 (permalink) Old 12-06-2019, 03:23 PM
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You bought 2 KTM caps?

Check the flat surface at the top of the radiator filler neck where the cap seats, there may be some damage or paint flaked off which will mean the cap doesn't seal properly. If so you may be able to fix it by sanding or filing it smooth again. The surface needs to be flat. Look at the seal up inside the radiator cap that seals on the flat surface you have just checked. Any damage to the seal? Has any grit found its way behind the seal.

But really, if the bike is still under warranty the dealer should fix it.
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