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if it cools good at highway or even long steady city speeds,the cooling system is working(Rad is good) but at idle or crawling along in hot weather You are not drawing enough air through the rad...hence the fan issue...so if the fan is not spinning enough to draw air...the clutch is weak and should be replaced.




1 exception may be a clogged up radiator (water flow restriction). Mine would get too warm in traffic/at idle, but would cool down at speed. Took a look inside and the passages I could see were pretty clogged, almost closed. Had it flow tested and it was verified by the rad shop as being severely clogged up.


1971 Plymouth Satellite
408/904 8 3/4 3.23 SG