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Depleting coolant and overheating

Old 03-27-2017, 01:49 PM
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Depleting coolant and overheating

Hey guys, I'm new to the forum. I bought a 98 vtr1000 recently, and I'm having overheating problems. I was riding down the road when my bike starts to sputter, I look down, and the temp gauge is near red. I had the fan going, so idk what was going on. I look to see if there's any coolant, low and behold there's no coolant at all in the resevoir. I add more coolant. Next day I did a complete coolant flush, and added 50/50 Prestone. It's running better, however, teh resevoir is depleted again. I went to the local auto parts store to see what's going on, and they said to check the spark plugs. Therefore, I go change my plugs, and it seemed like a milky residue is on both spark plugs. I also checked th coolant lines for leaks, and there aren't any. Could it be a blown head gasket or does anybody what could be the issue? Thank you
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Old 03-27-2017, 02:16 PM
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Before you leap into a top-end tear down, a quick and cheap fix might be to try a new radiator cap. The cap is designed to hold pressure (up to 20psi) in the cooling system which prevents the coolant from boiling as easily. If your cap is not doing that then you may simply be boiling coolant off and blowing it out through the reservoir as steam. You will probably be able to find a suitable cap for a car at your local auto parts store.
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Old 03-27-2017, 03:08 PM
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Okay, I'll try that out, and go from there. Thanks!
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Old 03-27-2017, 04:16 PM
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Stant 10233 radiator cap is suitable.

Is the plug residue wet or dry? Milky sounds wet. That's not good.

Is it blowing any white smoke?

Last edited by VTR1000F; 03-28-2017 at 04:14 AM.
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Old 03-27-2017, 08:43 PM
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What happened when you refilled and ran the bike? A blow head gasket could show as a milkshake looking overflow bottle. Not always but running a liquid cooled bike with no liquid for cooling can for sure lead to a blown head.

But yes replace the radiator cap no matter what. That is the #1 reason for cooling system issues.
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