too much pressure in radiator reserve tank


Information and questions on GL1500 Goldwings (1988-2000)
  • Sponsored Links
billcrawford
Posts: 75
Joined: Mon Feb 16, 2015 5:16 pm
Location: flower mound. texas
Motorcycle: 1990 goldwing 1500 gl/se

too much pressure in radiator reserve tank

Postby billcrawford » Thu Apr 23, 2015 4:29 pm



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



User avatar
Aussie81Interstate
Posts: 682
Joined: Thu Nov 27, 2014 2:34 am
Location: Penrith Australia
Motorcycle: 1982 CX500 Turbo (restoration project)
1981 GL1100 Interstate (sold)
1988 GL1500

Re: too much pressure in radiator reserve tank

Postby 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
Posts: 75
Joined: Mon Feb 16, 2015 5:16 pm
Location: flower mound. texas
Motorcycle: 1990 goldwing 1500 gl/se

Re: too much pressure in radiator reserve tank

Postby billcrawford » Thu Apr 23, 2015 6:42 pm

cap looks good rubber is good water is green

User avatar
Aussie81Interstate
Posts: 682
Joined: Thu Nov 27, 2014 2:34 am
Location: Penrith Australia
Motorcycle: 1982 CX500 Turbo (restoration project)
1981 GL1100 Interstate (sold)
1988 GL1500

Re: too much pressure in radiator reserve tank

Postby 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

User avatar
seelyark1
Posts: 465
Joined: Sun May 27, 2012 1:57 pm
Location: Dunnellon, Florida
Motorcycle: 2000 GL1500 SE
1998 GL1500 SE Totaled
1984 VT500C
1967 CB550-4

Re: too much pressure in radiator reserve tank

Postby 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.
Ride safe, and smart. Asphalt is like #1 grit sandpaper. Dave

User avatar
WingAdmin
Site Admin
Posts: 17047
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: too much pressure in radiator reserve tank

Postby 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.

User avatar
Rob H
Posts: 296
Joined: Sat Dec 13, 2014 7:41 am
Location: Muscat Oman
Motorcycle: 2000 1500 SE, XR 650, CBR 600, Harley FB, KLR 650, CBX 750 Cafe Racer, Z1000 Eddie Lawson.

Re: too much pressure in radiator reserve tank

Postby 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.

User avatar
ct1500
Posts: 813
Joined: Wed Nov 10, 2010 8:09 pm
Location: Glastonbury,CT
Motorcycle: 1988 GL1500
Contact:

Re: too much pressure in radiator reserve tank

Postby 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.
This is what I do
Local and need repair help with your 1500, Valkyrie or ST please PM

billcrawford
Posts: 75
Joined: Mon Feb 16, 2015 5:16 pm
Location: flower mound. texas
Motorcycle: 1990 goldwing 1500 gl/se

Re: too much pressure in radiator reserve tank

Postby 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

User avatar
Aussie81Interstate
Posts: 682
Joined: Thu Nov 27, 2014 2:34 am
Location: Penrith Australia
Motorcycle: 1982 CX500 Turbo (restoration project)
1981 GL1100 Interstate (sold)
1988 GL1500

Re: too much pressure in radiator reserve tank

Postby Aussie81Interstate » Fri Apr 24, 2015 9:22 pm

glad you got it sorted




Return to “GL1500 Information & Questions”




Who is online

Users browsing this forum: GrapeshotCrawler [Crawler], redbug and 2 guests