Next you should lift car with jack. If you do not know how to do this, you can find instructions in your car owner's manual on where to place jack as well as jack itself might bring some directions too. You should lift car until tire you wish to change is some inches away from ground. Then finish removing lug nuts and remove tire.

Once you have removed old tire, you should place spare one in correct place aligning holes. Then, you should place lug nuts and tighten them until they feel secure. Once you have done this, you must lower car back to ground and take jack away from it. Then, you should have flat tire repaired and change it back as soon as you can.

You should also check electric cooling fan by making sure that fan motor, relay and temperature are correct or otherwise it could cause engine to overheat. Besides this, you should also check radiator in case there are any debris in it as well as you should check its hose in case it has collapsed.

It is also recommendable that you check antifreeze concentration which should be 50/50 in order to be correct, otherwise it could cause car engine to overheat. If you do not find why your engine does overheat, you should ask a mechanic or an expert for advice. You should not try to fix this if you do not have proper tools and general car knowledge necessary for it.