Big Flapper Posted December 12, 2021 Report Share Posted December 12, 2021 I bought my CTLS last year and read the posts about antifreeze leaking during the cold weather. Well it's cold again and my rotax is leaking again. I was just wondering if anyone has found any cures for this annual problem. Thanks Tom Quote Link to comment Share on other sites More sharing options...
Roger Lee Posted December 12, 2021 Report Share Posted December 12, 2021 If it's coming from the back bottom weep hole at the water pump housing there is no fix. There are three different materials back there. Ceramic, stainless steel and aluminum. They all expand and contract at different rates. So during cold months you may or may not see a tablespoon full or two of ant freeze on the ground and there is no fix and it isn't hurting anything. so long as it isn't a huge puddle then all is okay. Quote Link to comment Share on other sites More sharing options...
GrassStripFlyBoy Posted December 12, 2021 Report Share Posted December 12, 2021 Pull the cowl and examine to identify the source. It may be as simple as the screw type hose clamps are not tight enough, or the spring type clamps should be located just adjacent to the bump on the tubing. If hoses with spring clamps (under the cylinder heads) are spaced too far off, or on top of, the bumps that can cause an issue. There are also fittings on the top of cylinders that are a threaded tube into a plate, that joint can be resealed with Loctite. The point is there are a multitude of places and ways a leak can occur, need to hunt down the souce. I had a teaspoon or so often occuring on the cold temp swings. It took moving a clamp about an 1/8" closer to the bump on tube and has been bone dry since. Quote Link to comment Share on other sites More sharing options...
GrassStripFlyBoy Posted December 12, 2021 Report Share Posted December 12, 2021 And there is always the possibility someone prior to you selected the wrong size tubing in a 5 year hose change process. One does not have to just accept the system leaks in cold temp swings. Quote Link to comment Share on other sites More sharing options...
Tom Baker Posted December 13, 2021 Report Share Posted December 13, 2021 I never had issues with mine, but I kept a heater on the engineall winter. It also made starting easier. Quote Link to comment Share on other sites More sharing options...
Animosity2k Posted December 13, 2021 Report Share Posted December 13, 2021 I get this every winter, and alas it is back again! I just let it go! I maybe have 1-2 TBSP when it occurs. Quote Link to comment Share on other sites More sharing options...
Anticept Posted December 13, 2021 Report Share Posted December 13, 2021 If you have any screw clamps on your hoses, give them a little turn and consider replacing them with spring clamps in the future! Quote Link to comment Share on other sites More sharing options...
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