SwampNut Posted May 26, 2022 Share Posted May 26, 2022 Full system cleaning and new distilled/coolant mix, for sure. Keep in mind the XX retains a lot of coolant and then needs to have the air well removed. Quote Link to comment Share on other sites More sharing options...
Karl Posted May 27, 2022 Share Posted May 27, 2022 Will do I’ve read it can also be the rad cap which can fail over time worth replacing at the same time I think 👍 1 Quote Link to comment Share on other sites More sharing options...
Zero Knievel Posted May 27, 2022 Share Posted May 27, 2022 Also watch to see if the thermostat is working properly. On the 99, the gauge will almost reach H before the fan kicks in and keeps the needle in the top 1/3 of the gauge. My 99 had a bad one, and air kept getting into the system. No issue when going at speed, but I kept getting boil overs when still. It’s a cheap enough replacement if you’re going to take the tank off anyhow. Quote Link to comment Share on other sites More sharing options...
SwampNut Posted May 27, 2022 Share Posted May 27, 2022 7 hours ago, Karl said: Will do I’ve read it can also be the rad cap which can fail over time worth replacing at the same time I think 👍 I did have one that was weeping, so I assume that meant either the seal had failed or the spring was soft. Quote Link to comment Share on other sites More sharing options...
superhawk996 Posted May 27, 2022 Share Posted May 27, 2022 If the cap isn't holding pressure the coolant can boil at a hot spot without changing the indicated temp so it'll burp some out of the reservoir. Quote Link to comment Share on other sites More sharing options...
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