INSUFFICIENT AIR FLOW, CAUSES
Fan Clutch Not Engaging - The fan clutch fails to engage, resulting in the fan clutch slipping on the water pump shaft.

Missing Radiator Shroud - The shroud direct air flow from the fan through the radiator. With the shroud missing air is drawn around the radiator rather than through it.

Missing Fan Blades - Results in reduce air flow and an unbalanced fan.

SYMPTOMS
- Excessive/constant electric cooling fan operation.
NOTE: The electric cooling fan is used to assist the belt driven fan during periods of high heat load.

- Engine warms up normally but gradually overheats.
- Cooling system overheats when idling or driving at low speeds, but may operate normally at cruising or highway speeds.
NOTE: With speeds in excess of 25 mph, sufficient air flow is forced across the radiator to cool the engine without the use of the cooling fan (under normal conditions).

- Cooling system overheats when under heavy engine loads.
- Very little air flow is felt flowing over the engine during hot idle.

__________________
All it takes for evil to prevail is for good men to stand by and do nothing.

Too many people tip toe through life, never attempting or doing anything great, hoping to make it safely to death... Bob Proctor

'95 S320 LWB
'87 300SDL
'04 E500 wagon 4matic