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The fan isn't very hard to turn, but with engine off I can flick it with my finger and it spins 2 maybe 3 times so it's a little stiff. I don't know how it's supposed to feel otherwise lol, still building experience in the ranger-verse. The owners manual says to use the motorcraft gold, or yellow colored. The previous owner used green and I'm thinking it's possible that was the cause of the problem, the thermostat was the original Ford one. But, I didn't see a buildup of rust or anything in the hoses or in the overflow. Also, the radiator doesn't have a cap!! WTF!! You just fill it in the overflow container and I guess that's it. There is no radiator cap, I promise. I've looked really hard cause my mind was being thrown for a loop. I filled it with Zerex 50/50 Gold/Yellow from o'reilly's. I've never really had an over heating issue, in the summer here the engine never really moved to middle except one time it went to exactly middle during traffic with the ac on full blast. I got a 190* thermostat which is what the oem motorcraft one is. If I do have problems though I will definitely use the products you mentioned above. Hopefully I don't miss the guys call in the morning, I'm a really heavy sleeper lol.
Sorry, I miss-spoke on the coolant not paying attention to the year. Used to speaking to and about pre-2000's most times.
If the Radiator doesnt have a cap, they generally call that a closed system and I believe is a 195, that is OE temp according to my replacement guides. Ford states a 190* but then claims it may not open until 197* ??. To me that would be a minimum of 195* but a 197* but hey, what do we know? The one in our two rigs is a 180* because of our temps here in Las Vegas. The thicker dual core radiator do quite a bit to keep the temps down, even under long times of idle.
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