On the TB side there is a little cover on the LIM held on by 2 bolts. If you remove it, it will drain out the LIM of coolant. It's a good idea to do to keep any coolant from dripping in the lifter valley. You should change the oil when your done before you start the car too. Any coolant that may have dripped down to the pan can trash your bearings, so precaution is a good practice.