GL1500 Antifreeze leaking slow at first now pouring - Steve Saunders Goldwing Forums

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post #1 of 12 (permalink) Old 09-02-2012, 05:23 PM Thread Starter
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Hi - I'm looking for help with a perplexing problem. I have a 1999 GL1500A that has an antifreeze leak. In search of origin I've taken off all the panels, fan, & cowling. I've inspected all hoses, radiator and isolated the overflow tank. Checked radiator cap ok, Problem presents only when thermostat kicks in, fans on. Findings-antifreeze seems to be gathering under the timing belt cover - removed cover. Appears antifreeze gathering in timing belt housing ? but still I cannot see where it is coming from ??. PS - engine purrs like a kitten, no sign of oil contamination. Any ideas or suggestions greatly apprecia
ted! Thanks Ed
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post #2 of 12 (permalink) Old 09-02-2012, 05:32 PM
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Welcome to the forum Ed. If the water pump weep hole is dry, there are a few other possibilities for your leak. The metal crossover pipes on top of the engine are very thin and can leak, many posts about that from fellow forum members. Coolant tubes to the carburettors is another possibility.
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post #3 of 12 (permalink) Old 09-02-2012, 05:49 PM Thread Starter
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Thanks for the input. The weep hole is dry. Will check out suggestions and read prior forum on same. Appreciate it. By the way, I am formerly from Floral Park, LI, NY. Now in TX
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post #4 of 12 (permalink) Old 09-02-2012, 05:51 PM
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Welcome to the forum echall777
Did you inspect the rubber on top of the Reservor tank where elbow is? That cracks and will spew antifreeze when hot.
Another spot is the crossover pipe between radiators.
Another I have seen is the bottom of reservoir tank locator **** worn through from wrong spaced holes in frame to hold it in place.

Let us know what you find.

Stu
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John 14:6 Psalm 118:19-29
CMA Wings of Eagles-Escondido, Patriot Guard Ryder
+2008 Cabernet Red ABS/Airbag bought 6/2013 @16,000
+1983 ASPENCADE Barn find @36,000 to be sold
+1976 CB750K6 @25,000 was Dad's
Previous bikes
-1999 GL1500 ASPENCADE Red Sold barn find restored
-1999 GL1500 SE(@57k)(totaled by cagger @105,000) Feb 2013
-76 CB750K Red(new) sold @ 45k
-75 CB750K Blue(new) 9,000 mi Before cousin totaled it.
74 CB450 Burnt Orange(new) 9,000 miles sold
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post #5 of 12 (permalink) Old 09-02-2012, 06:11 PM Thread Starter
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will do stu, been a long day,back at it in the am, M y main concern is where is it getting into the timing belt area
from the back ???.
ps north texas patriot guard, temp. grounded.

thx ed
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post #6 of 12 (permalink) Old 09-02-2012, 06:19 PM
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Through the back of the timing belt cover? Not coming down from above there and leaking in?

Stu
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John 14:6 Psalm 118:19-29
CMA Wings of Eagles-Escondido, Patriot Guard Ryder
+2008 Cabernet Red ABS/Airbag bought 6/2013 @16,000
+1983 ASPENCADE Barn find @36,000 to be sold
+1976 CB750K6 @25,000 was Dad's
Previous bikes
-1999 GL1500 ASPENCADE Red Sold barn find restored
-1999 GL1500 SE(@57k)(totaled by cagger @105,000) Feb 2013
-76 CB750K Red(new) sold @ 45k
-75 CB750K Blue(new) 9,000 mi Before cousin totaled it.
74 CB450 Burnt Orange(new) 9,000 miles sold
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post #7 of 12 (permalink) Old 09-02-2012, 06:27 PM Thread Starter
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not coming from above,best i can tell, comes from back and gathers on bottom shelf of inside timing belt housing
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post #8 of 12 (permalink) Old 09-02-2012, 08:33 PM
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Hi echall777 and welcome to the forum,...could it be coming from the water tubes at the rear of the thermostat housing?..worn "O" ring(s) or maybe the housing itself?..if so,I think your best bet would be to remove left radiator fan to get a better look.

Good luck,

Peter.

(was) WINGIN' "DOWN UNDER"....
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1984 1200 Interstate....SOLD
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1993 1500 Aspencade....SOLD
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post #9 of 12 (permalink) Old 09-02-2012, 11:48 PM
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I had exactly the same leak on mine... It's the large Y-shaped hose that attaches to the top of the thermostat. Look carefully at yours and verify that the hose is sitting flush to the 3(?) stops molded into the neck of the thermostat... If not, then the hose has lifted slightly off, resulting in a big leak whenever the thermostat turns on.

If yours is as such, then Remove the hose from the thermostat, and also remove any Clear Plastic Tape present on the thermostat connection (It is often very hard to see)... then re-assemble it. Verify it works by leaving one of the fans off the bike, then warming up the engine to the point where the thermostat opens... If the leak persists, then you'll easily see it emerge from that joint.


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Dark Side #590


GL1500, 1990SE, 220k miles
Front: Bridgestone Battlax BT45, 41psi
Rear: Austone 175R16, 50psi

GL1800, 2003, 60K miles [following virginity reconstruction]
Front: Bridgestone Battlax BT45, 41psi
Rear: Pirelli Winter Snowcontrol Series3, Run Flat, 41 psi
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post #10 of 12 (permalink) Old 09-03-2012, 12:12 AM
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I remember reading on here somewhere that one of the bolts holding the timimg belt cover needs sealant as water can get past it. This leak sounds too big for that but maybe worth checking.

GL1800A 2006
Previously:
GL1500SE \'98
Harley Fatboy 2004
Triumph Rocket Touring 2010
Honda Valkyrie 2002 (fantastic!)
Pan European ST1100
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