Common Causes of Overheating

• No water in the radiator.
• Improper timing.
• Low speed driving.
• Low on oil.
• Spark too retarded.
• Clogged muffler.
• Too much carbon on the cylinders.
• Weak exhaust valves (springs).
• Poor carburetor adjustment.
• Leaking radiator.
• Too loose or too tight a fan belt.
• Round tube radiator.
• Packing not too tight on water pump.
• Packing nut too loose and leaking.
• Air seeping in around manifold.
• Clogged block and head.