advance ignition timing will often cause an engine to run hot
If the spark occurs too late, the maximum cylinder pressure will occur too late, thus not converting the gasoline energy into power, but wasting it as heat that the cooling system must get rid of. If the ignition timing is incorrect, not only will the engine run too hot but it won t have the power it should.An incorrect air/fuel mixture can also cause an overheating problem; a lean air/fuel mixture will cause an engine to create more heat than a rich air/fuel mixture. distributor test stand is much easier because you can run the distributor at 6000 engine rpm or more without the fear of hurting an engine. In many cases a distributor may still be advancing the timing well above 6000 RPM; therefore the advance curve must be checked at all the rpm ranges the engine will be used in!