연주하고 돌아오는 길에 차에서 끼익~소리가 나길래 연주복입은채로 차 앞뚜껑을 열어보았답니다(참 안 어울리죠^^..z) ...여러 물통들 살펴보니 쿨런트랑 power steering oil 이 달랑 달랑 하길래 월맛가서 사다가 부었죠. 근데 쿨런트가 여러종류가 있더라구요. 혹 도움이 될까 해서 web 에서 하나 퍼 올립니다~

How do I check the coolant in my car? 
 
 Engine coolants are important in car maintenance because they keep the engine cool, and engines heat up in any type of weather. To make sure your engine never overheats, check the coolant level in your radiator about every 3,000 miles.
1. Park your car on a level surface and turn off the engine. Make sure the engine is cool before you open the hood or check anything. Note that it is dangerous to touch or remove a hot radiator cap--it can cause severe burns.
2. Open the hood and locate the coolant reservoir, which is a plastic tank located near the radiator. The radiator and the coolant reservoir are usually located at the front of the car. If you can't find the reservoir, consult the owner's manual.
3. Simply check the outside of the reservoir to verify the coolant level inside. The outside of the reservoir is marked to measure the coolant, and the reservoir is clear enough to see the coolant level.
4. If the level is low, open the cap on the coolant reservoir and add coolant. You can use a funnel if you like. Some coolants require water before you add them, so check the label on the coolant before pouring it in.