2009 Yamaha Motorsports RS Vector ER Owners Manual - Page 55

Periodic maintenance and adjustment When the engine has cooled, place a thick rag or towel over the coolant reservoir cap, and slowly rotate the cap counterclockwise to the detent. This procedure allows any residual pressure to escape. When the hissing sound has stopped, press down on the cap while turning counterclockwise and remove it. 1. "COLD LEVEL" mark 4. Install the right side cover and the shroud. Bleeding the cooling system The cooling system must be bled of air if the coolant reservoir becomes empty, if air can be seen in the cooling system, or if there is a cooling system leak. Consult a Yamaha dealer. 1. Coolant reservoir cap ECS00500 NOTICE Operating the engine with an improperly bled cooling system can cause overheating and severe engine damage. To check the coolant level 1. Place the snowmobile on a level surface and apply the parking brake. 2. Remove the shroud and the right side cover. (See page 38 for removal procedures.) 3. Check the coolant level in the coolant reservoir when the engine is cold. If the coolant level is below the "COLD LEVEL" mark, add coolant until it reaches the "COLD LEVEL" mark. (See the following section "Replenishing the coolant" for more details.) NOTICE: Hard water or salt water is harmful to the engine parts. You may use boiled or distilled water, if soft water is not available. Tap water can be used temporarily in an emergency. [ECS00491] Replenishing the coolant 1. Remove the shroud, the right side cover, and the top cover. (See page 38 for removal procedures.) Remove the coolant reservoir cap and add coolant until it reaches the "COLD LEVEL" mark. 2. 49