The coolant should be changed not less than once a year under normal driving conditions. Change the coolant every two years if the bike is only driven occasionally, for example once a week. Checking the coolant level is important, as some liquid may have to be added occasionally.
you should have a petcock valve on the bottom of the radiator. beware. do not use automobile antifreeze in a motorcycle. it contains silicone that will wear your water pump. make sure to use motorcycle antifreeze or silicone free automotive. Try this link out. It's got pictures and directions to help you with the coolant change. http://users.zoominternet.net/~capronem/Coolant%20change.htm
follow the owners manual as to when it is time to change the coolant. Get a manual from MOTORLIT.COM
You should change coolent every other year.
Every time you change the coolant.
Every 150,000km
Once every three months you should change the coolant in your 2003 S10 ZR2. ?æDifferent models and makes of vehicles may require you to change the coolant more or less often.
Every other oil change.
About 2/3 full.About 2/3 full.
Should be a plug at the bottom or rear side of the radiator
"Change the waterpump when it starts dripping coolant out the weep hole or makes noise". - Scotty Kilmer
There should be a small coolant converter located near the brake booster or near the radiator it has 4 smaller coolant lines. It has a vacuum canister check that vacuum line for any cracks or it could possibly be your thermostat. Check coolant level in the radiator. Just because you have coolant in the reserve tank does not mean that your radiator is full.
Used coolant should be properly recycled.