What do you mean by heat pockets Ryan? Do you mean air pockets in the cooling system? IF this is the case, read below.
With the newer cars having the radiators so low, this has become a MAJOR issue because the radiator cap is no longer the highest place in the cooling system, which is where the air wants to go. Some manufacturers (Ford, Chebby, etc) even started putting in little air bleeds into the cooling systems. Having figured out the newer cars, I adapted what I've learned to the older cars as well.
Basically what ya do pal, is this. Park the car somewhere you don't mind making a mess. Fill the cooling system. Leave the cap OFF. Start the car. IDLE, no throttle at all. Let the system warm up. It'll puke/suck for a bit until the thermostat opens, you'll know when the happens, the coolant level DROPS all of a sudden. Let the car idle for a few more minutes, and slowly add a mixture of antifreeze and HOT, I reiterate, HOT water. until full. Let the system circulate the new mixture for a few minutes, and make sure it's done "burping" out the air bubbles. A bit of steam from the radiator is a good indicator that she's up to temp and circulating. Once you're sure the system is stable, throw the cap back on. Then shut the engine off. Let the engine cool off. Since we put the cap on with hot fluid, and it has since cooled, we created a vacuum of sorts. Once the engine is cool (over night if you have the time) crack the cap off slowly. One of 2 things will happen. It'll puke some more, but more than likely it'll pull some air back into the system. When this happens, just top her off, and you should be good to go.
Snap On actually makes a funnel system for this. It mounts on the radiator cap, and you fill the funnel half full. Start the engine, let her warm up. What the funnel does is lets the engine burp out the air, but when it "sucks", all it gets is more coolant. This is alot faster, but it'll work the way I described above.
Just use common sense, and don't let the cooling system get TOO low at any time, and you'll be fine.
Now, if this ISN'T what you were talking about, we're both screwed. LOL
