Coolent leak
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RE: Coolent leak
I had the same problem after I filled up my system for the first time in years. One of the coolant pipe fittings attached to the thermostat housing had a bad O-ring. It's cross section was pretty big, but I found a replacement in a AC O-ring kit. The fitting comes off with one bolt so it shouldn't be too hard to check. Also check the cap. If the gasket isn't perfect or the cap isn't very tight when tight, just replace it. Cheap insurance. Oh yeah, check the hose clamps too.
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RE: Coolent leak
Hi Gill, I had a leak around the same area when I bought my Bike. Someone had tightened one of the clamps so hard, it had broken the 3-way joint under the clamp so it would only leak under pressure. Is your bike overheating (anormally that is!)? If so it could also be the thermostat not opening enough or a bad radiotor cap. If the cap cannot let the oberflow out, It will have to get out at the weakest point either a loose clamp or pin hole in a fitting. Hope this helps!