below exhaust manifold between #3 and #4 runner you will see a brass nipple.13mm deep socket.
That's the Drain. Cleaner then unhooking the lower hose.
No chance of cracking the plastic radiator nipple.
mix up 2 gallons as mentioned.
Start engine, wait 'til it reaches temp. If it starts to get above Normal grab the upper hose and squeeze it hard and fast about 10 times. Like doing CPR on the car. you will feel the upper hose get hot and the Temp gauge will go down.
Sometimes you need to burp these cars when replacing the Coolant.
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'75 Jeep CJ5 345Hp ChevyPwrd, two motorcycles, '85 Pickup: The '89 Volvo is the newest vehicle I own. it wasn't Volvos safety , it was Longevity that sold me http://home.lyse.net/brox/TonyPage4.html