Coolant Hoses

Time: 1.5 hrs

I ran the two coolant hoses to the radiator. The left side may be cut back more once I get the exhaust installed and see if there is a way to anchor the hose to the exhaust. The left side also involved using and 45 degree hose since the angle was a bit too much for the super flexible hose that I’m using. On the right side I was able to directly connect the hose to the radiator since the hose was at a good angle to connect to it. The hose I’m using is really flexible and is made from silicone. It meets the requirements in the Rotax manual and ¬†seems to be very high quality hose. I’m really impressed with how well the hose is able to bend and not collapse. I put some thermal sleeve on the parts of the coolant hoses that run near the exhaust. The exhaust is also wrapped so hopefully it won’t get too hot. The sleeve looks a bit nicer then the thermal wrap, but it’s kind of a pain to put on and if the hose bends then it’s even harder. If I did this again I’d probably do the wrap rather than the sleeve.

Photo of the right side hose. I was able to run it directly to the radiator without having to use a 45 or 60 bent hose. I anchored it to the clamp that holds the large air intake to the turbo using an M5 nut and a bit modified adel clamp. I modified a longer adel clamp by cutting it a bit shorter and drilling a new mounting hole on one end. I suppose I could have just bought a larger clamp, but I had a large clamp that I wasn’t going to use. The clamp helps keep the hose a bit farther from the exhaust and provides some strain relief on the connection to the radiator.

The left side hose is quite a bit longer than the right and I had to use a 45 bent hose to connect it to the radiator. I’ll probably end up cutting this hose a little shorter once I see where I can anchor it. I have one anchor on the vertical portion using two adel clamps tied to the white engine mount. Note: I’m going to redo the clear tubing for the overflows with a Y fitting instead of the T to get a better downward flow.

Photo of the join to the 45 degree bent hose. The join is made by using a short piece of aluminum tubing that fits inside of the silicone hose.