Boiling Over
If you start with the ping, usually a function of octane rating and or timing. Back off your timing a little bit and see what happens. It can contribute to to over heating just a bit, but there are usually other causes. I can't tell you if a 15 pound cap is right for your model but there are several things you can check. First you want to see if your thermostat opens. WITH THE CAR COLD!!!!!! take off the radiator cap, start the motor and look down into the radiator. When the engine heats up you should see motion in the water. If you never see motion you most likely have problems with your thermostat but not conclusively. At that point you will need to pull your thermostat and put it in a pan of water on the stove and heat it up. You should see it open when the water gets hot enough. If not then that is probably the problem. Note: spend the extra bucks on a thermostat that fails in the open position. Since you now have the cooling system open you might as well check the radiator. This is the one that got me. Take off the lower hose. If you can reach both, hold your hand over the bottom outlet and fill the radiator with water. When full pull your hand off off the outlet. If all the water doesn't drain out within just a few seconds your radiator is clogged and you will have to get it cleaned out. One of the above should take care of your problem. Just one question, if you spend a great deal of time idling an hour or more, you would be well served by putting an electric fan on your radiator so you can get more through it when sitting.
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