Why worry about coolant?
A. Bubbles in the IAC are bad and make idle fluctuate in a slow, annoying way. 2. Set the timing Insert a jumper pin between the TEN and GND pins. Hook up the timing light to the battery for power and hook up the signal to the #1 wire location marked on the distributor cap. Loosen the two 12 mm bolts on the disty so it can rotate (not too loose). Now, with the jumper pin inserted, start the car, if it dies, open the idle air screw on the top of the throttle body a couple turns.
