I did the RavenTai temp gauge mod and have been noticing temperatures creeping up towards the bottom of the red (about 210 to 215 deg) when sitting in traffic or going up hills, either at freeway speed or crawling. Outside temperature is around 80 deg so nothing very hot.
I checked my fan clutch and the PO had installed an aftermarket unit, so I bought a new Aisin blue hub fan clutch and replaced the fluid with 15k cst silicone oil (I put in a little over 40 mL). I didn't mod the turn-on temperature, but did verify the thermal spring was opening and closing at around 105-110 deg. I also replaced my radiator cap with a new OEM.
With the old fan clutch, I heard a distinct "roar" at startup. The blue fan clutch has no roar on startup, and I can't hear it turning on and off. It also doesn't seem to be cooling any better (maybe even a little worse) than the aftermarket, and it doesn't seem to be pushing a ton of air. But on the other hand, the new clutch doesn't freewheel, and seems to have plenty of resistance when I turn it by hand. However, today my engine temperature still climbed up to just under the "red" when crawling up a steep hill. When I turn off the A/C and turn on the heater then the temp drops back down quickly.
Does the lack of roar on startup, and the fact that I can't hear the fan clutch turn on and off, mean that the new blue fan clutch is not functioning properly? Could my belts be too loose, or what would be the next step after replacing fan clutch and rad cap, a new radiator? I'd like to get the cooling system rock solid for off roading. Thanks
I checked my fan clutch and the PO had installed an aftermarket unit, so I bought a new Aisin blue hub fan clutch and replaced the fluid with 15k cst silicone oil (I put in a little over 40 mL). I didn't mod the turn-on temperature, but did verify the thermal spring was opening and closing at around 105-110 deg. I also replaced my radiator cap with a new OEM.
With the old fan clutch, I heard a distinct "roar" at startup. The blue fan clutch has no roar on startup, and I can't hear it turning on and off. It also doesn't seem to be cooling any better (maybe even a little worse) than the aftermarket, and it doesn't seem to be pushing a ton of air. But on the other hand, the new clutch doesn't freewheel, and seems to have plenty of resistance when I turn it by hand. However, today my engine temperature still climbed up to just under the "red" when crawling up a steep hill. When I turn off the A/C and turn on the heater then the temp drops back down quickly.
Does the lack of roar on startup, and the fact that I can't hear the fan clutch turn on and off, mean that the new blue fan clutch is not functioning properly? Could my belts be too loose, or what would be the next step after replacing fan clutch and rad cap, a new radiator? I'd like to get the cooling system rock solid for off roading. Thanks
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