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Classic Goldwing Technical Forums
Goldwing Customization & Tricks
Cooling system mod ideas
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<blockquote data-quote="ekvh" data-source="post: 214431" data-attributes="member: 1179"><p>That’s the road I went down. Assumed I must have a leak, so pulled the heads and found no evidence of it on the copper gaskets or heads. I think I did that three times. Two times were with thinner head gaskets (0.010” under) and I did have my pistons kissing the heads slightly. So I went to a stock thickness copper gasket. Same issue until I enlarged the overflow tank. Then I could see through the clear plastic tubing a surge of coolant almost always when really loading the bike rpm. With the larger reservoir it would not overflow. Sometimes you would see a s the bike warmed up, but then it was a slower movement of the coolant through the tube. </p><p></p><p>I don’t know the volume of my reservoir but I think it’s a liter. Not sure of stock size. </p><p></p><p>I put the 1200 heads back on just to see how well they perform compared to the 1000 heads. They’re pretty close to the same, maybe better down low but give up a bit around 7000. </p><p></p><p>There are others who have done this mod, (1000/1100 heads/cams) but they don’t report much. </p><p></p><p>If the system is pressurized and there is sudden expansion from heat, it has to go somewhere, either it increases the pressure or the cap releases it. You’re probably right that it has nothing to do with pump speed, because the system is closed and the pump would help draw the coolant through the radiator. Cavitation??</p><p></p><p>On mine it did not continue spewing coolant. It would stop. But if you didn’t replace what was lost, and did that a few times more, your level would be too low, and then you start running hot. </p><p></p><p>I have to add a little coolant now and then because my cross tubes leak occasionally.</p></blockquote><p></p>
[QUOTE="ekvh, post: 214431, member: 1179"] That’s the road I went down. Assumed I must have a leak, so pulled the heads and found no evidence of it on the copper gaskets or heads. I think I did that three times. Two times were with thinner head gaskets (0.010” under) and I did have my pistons kissing the heads slightly. So I went to a stock thickness copper gasket. Same issue until I enlarged the overflow tank. Then I could see through the clear plastic tubing a surge of coolant almost always when really loading the bike rpm. With the larger reservoir it would not overflow. Sometimes you would see a s the bike warmed up, but then it was a slower movement of the coolant through the tube. I don’t know the volume of my reservoir but I think it’s a liter. Not sure of stock size. I put the 1200 heads back on just to see how well they perform compared to the 1000 heads. They’re pretty close to the same, maybe better down low but give up a bit around 7000. There are others who have done this mod, (1000/1100 heads/cams) but they don’t report much. If the system is pressurized and there is sudden expansion from heat, it has to go somewhere, either it increases the pressure or the cap releases it. You’re probably right that it has nothing to do with pump speed, because the system is closed and the pump would help draw the coolant through the radiator. Cavitation?? On mine it did not continue spewing coolant. It would stop. But if you didn’t replace what was lost, and did that a few times more, your level would be too low, and then you start running hot. I have to add a little coolant now and then because my cross tubes leak occasionally. [/QUOTE]
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