too much pressure in radiator reserve tank


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billcrawford
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too much pressure in radiator reserve tank

Post by billcrawford » Thu Apr 23, 2015 4:29 pm



why would reserve tank build enough pressure to blow off the snap on cap?



Aussie81Interstate
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Re: too much pressure in radiator reserve tank

Post by Aussie81Interstate » Thu Apr 23, 2015 6:25 pm

Bad Radiator cap

if the radiator cap is not holding the pressure - the whole system would pressurise to the next available point - being the overflow bottle.

has your bike been running hot ? is the fluid in the reserve tank contaminated ?

:)

billcrawford
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Re: too much pressure in radiator reserve tank

Post by billcrawford » Thu Apr 23, 2015 6:42 pm

cap looks good rubber is good water is green

Aussie81Interstate
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Re: too much pressure in radiator reserve tank

Post by Aussie81Interstate » Thu Apr 23, 2015 11:55 pm

Just because it looks good - does not mean it is good.

I would run the bike - and see for yourself - if it does it again - the only way for this to occur is if the radiator cap is not sealing correctly or when the cooling system has too much pressure in it - it must release soemwhere and if not leaking from any other point to release pressure, then it would seem it would go to the coolant overflow. So if the radiator cap spring is weak - then it allows fluid and anything else (like pressure) to escape to the next point.

cheers

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seelyark1
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Re: too much pressure in radiator reserve tank

Post by seelyark1 » Fri Apr 24, 2015 8:50 am

Isn't there a vent on the reserve tank? If it is plugged, the air in that tank has to go somewhere if water is flowing to or from the tank.
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WingAdmin
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Re: too much pressure in radiator reserve tank

Post by WingAdmin » Fri Apr 24, 2015 10:31 am

Two different things could cause this:

1. Radiator cap is faulty, the relief valve is sticking. It is letting the pressure in the cooling system build far too high before opening and allowing coolant to flow to the reservoir. Sudden flow of high-pressure coolant to the reservoir as it opens could overwhelm the vent in the reservoir, blowing the reservoir cap off.

2. Plugged vent in the reservoir. As hot coolant is moved into the reservoir from the radiator, there's nowhere for the air to go, so it blows the cap off.

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Rob H
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Re: too much pressure in radiator reserve tank

Post by Rob H » Fri Apr 24, 2015 1:13 pm

I would replace the radiator cap and then be looking at a head gasket problem provided the thermostat is working properly.

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ct1500
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Re: too much pressure in radiator reserve tank

Post by ct1500 » Fri Apr 24, 2015 5:51 pm

Check for a pinched vent hose which is black plastic and runs down the right side frame down tube.
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billcrawford
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Location: flower mound. texas
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Re: too much pressure in radiator reserve tank

Post by billcrawford » Fri Apr 24, 2015 6:27 pm

ok.. yall got it the over flow tube was pinched between a cover and the frame.. thanks to all

Aussie81Interstate
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Re: too much pressure in radiator reserve tank

Post by Aussie81Interstate » Fri Apr 24, 2015 9:22 pm

glad you got it sorted



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