A turbocharged snowmobile works in conditions that rarely suit anything mechanical. The engine is asked to make boost at low air temperatures, in deep powder where airflow is poor, and the machine is expected to do it all day. Charge cooling is not a performance nicety here; it is part of keeping the engine consistent as the snow depth and the ambient temperature change.
The Ski-Doo 900 ACE Turbo layout puts a charge cooler in a tightly packed engine bay, fed by air that has already passed through the bodywork. Every part of that path matters, and the hoses that connect the cooler are the parts most exposed to heat, cold and movement.
Owners who ride hard describe the same symptom when something is wrong: the machine loses its edge late in a long pull, or it runs differently between a cold morning and a warm afternoon.
Start with the cooler itself, because it is the part that decides charge temperature. A core that is blocked externally by snow dust, ice or belt debris cannot cool the air passing through it, and the engine will feel the difference before anything looks broken.
Then look at the hoses. On a snowmobile, hose damage rarely comes from pressure alone. It comes from abrasion against bodywork, from ice forming in a joint and then being pulled apart by movement, and from the repeated flexing that happens when the engine rocks in its mounts over rough ground.
Any hose that is polished on the outside has been rubbing against something. That is the fault to fix, not just the hose to replace.
Turbocharger installations on snowmobiles concentrate a lot of heat into a small space, and the bodywork that keeps snow out also keeps heat in. Managing that is partly about the cooler and partly about the shielding around the exhaust side.
Heat shielding that has been cooked or torn away lets radiant heat reach the charge hoses, which shortens their life and softens them. Our exhaust heatblanket and exhaust heatshield ranges are worth reviewing whenever the engine bay is open, because the shielding is usually the cheapest part of the repair and occasionally the most effective.
Keeping charge air cool also keeps the engine calibration stable. A machine that runs consistently across a range of conditions is easier to ride fast than one that changes character as the day warms up.
The unusual demand on a snowmobile hose is that it has to stay flexible when cold and still hold its shape when hot. Rubber stiffens sharply in the cold, and a stiff hose on a flexing engine is a hose that will crack.
Reinforced silicone is the standard answer. It stays more flexible at low temperature than rubber, tolerates heat well, and the reinforcement prevents collapse under vacuum on the intake side. Our performance silicone hose pages set out the constructions we build.
For this application, the choice of compound matters as much as the dimensions, so it is worth specifying the temperature range rather than ordering by shape alone.
Cooler replacement on this machine is a bay-out job. The panels come off, the charge pipes are released, and the core is withdrawn from its mounts. Photograph the routing before you start, because several hoses in that area run close to each other and can be refitted in the wrong order.
The replacement core for this application is listed on our Ski-Doo charge cooler page, and it is the part that restores charge cooling to the level the engine expects.
Refit the shielding before the panels go back on. It is very easy to leave a shield off during reassembly and then find that the new hose is being cooked by radiant heat from the exhaust side.
Cold-and-hot cycling is what loosens clamps on a snowmobile. A clamp that is correct when cold will often be slightly loose after the first ride, and slightly looser again after the second. Rechecking the joints after the first two outings is a habit worth having.
Look also at how the hose sits in relation to the bodywork. A hose that is pressed against a panel will rub through, and a hose that is stretched to reach its spigot will pull on the core.
Factory hoses for snowmobiles are often discontinued sooner than the machines disappear, and that is where custom work comes in. A drawing with dimensions and material noted can be turned into tooling directly, or a sample can be sent and an engineer will gauge the dimensions and produce a drawing from it.
Samples are moulded and measured, and mass production begins only after you have confirmed a sample you are happy with. Colour, surface finish and logo can all be specified as part of the same order.
Snowmobile cooling parts are usually ordered in a hurry, before the season starts or in the middle of one. Fixing the specification first avoids a second wait.
Send the model details and a photograph of the installation, and we will confirm the specification before production. The same process covers one-off parts and repeat orders, and the workshop overview on our customization page describes how a project moves from enquiry to delivery. If you are unsure of the exact variant, our shop by vehicle pages are the quickest way to identify it, and our custom route covers the rest.
