Cleaning and Inspection

RADIATOR AIR FLOW





Air forced through the fins of the radiator by a fan cools the coolant pumped through the radiator. Environmental debris (paper, straw, lint, dust, etc.) can obstruct the fins and stop the flow of air which will reduce the cooling effect of the radiator.





A slipping belt will result in a slower fan speed and reduced cooling. A malfunctioning automatic belt tensioner can be the problem.

NOTE: Check the bearings in the fan hub and other pulleys to make sure they are not causing excessive belt vibration and slippage.





Thermatic fans operate only as needed to keep the coolant at the correct temperature. If the fan does not operate when the coolant temperature Increases, the engine will run hot. If the fan does not shut off when coolant temperature decreases, the engine will run cold.

NOTE: Make sure that the coolant temperature sensor is functioning correctly.





An incorrect fan shroud or obstructions can reduce air flow and cause the engine to run hot.

NOTE: Check to be sure air is not re-circulating. Check for missing baffles.