The clutch engages when that bimetalic strip bends and pushes a pin allowing circulation if viscus silicon that transfers tourque between impeller and turben.
Replacing mine tomorrow. All winter I'd hear fan roar when I shouldn't. Put it off. Started to hear bearing noise when turning off van. Put it off. Heard a weird noise one day during turning it off. Fan quit roaring, forgot about it.... Had our first 80⁰f day yesterday and figured I'd check the fan. The bearing locked up and the fan removed itself from the threaded post! (I guess that was the noise I heard in winter when it magically fixed itself) My job is now easier to replace it. Lol. 2009 with 100k miles.
Good test I'll try that instead of just using something to c how easily I can stop it Is that really how it works? most I know use a metal that expands at right temp and actual opens a Reservoir that let's fluid flow out it creates friction between the fins Temperature of fluid doesn't really have anything to do with it engaging
that one at 2;03 looks like a non-thermal clutch because it doesn't seem to have the thermal spring at the front. I keep hearing about the ROARRRR!!!!!!!!!!!!!!!!!!! but I havn't heard it yet. Some clutches are quiet I think.
Temp gauge on my 2002 T1N runs higher when going up hills and on hotter days. Tried the paper test to see if its the fan clutch is faulty, it seems strong, the paper didn't slow it down at all, I've not heard the fan clutch kick in, could it be faulty?
So what's the difference in an original T1N fan clutch and a new Mercedes brand fan clutch, just the age, is that what you're referring to when you say no matter what, the original T1N's are bad? thanks
another way to check the fan clutch is WARM THE ENGINE TO OPERATING TEMPERATURE AND THEN TURN IT OFF WHILE OBSERVING THE FAN, AND IF IT SPINS ON AFTER THE ENGINE STOPS; THE FAN CLUTCH IS EITHER BAD OR IT IS THE WRONG FAN-CLUTCH FOR YOUR VEHICLE, the fan should stop with the engine. Some fan-clutches are REVERSED. When buying a new one it is important to get the correct one for your model.
My Audi A4 B5 petrol ADT engine is overcooling after 75 miles per hr. Thermostat is ok, so I am a bit lost. Could the fan be a problem not disengaging if so how can I tell.
My 94 Ford van is waiting for the tow truck as I write this. There is a loud scraping noise and the engine was starting to overheat. I may have to drive the van 50 yards, or so, to have the tow truck get to it. Am I risking doing damage to the water pump if the fan clutch locks up when I am moving the van?
How about if it starts squeaking but keeps turning and i put oil on the bearing and it stops squeaking and is turning right !!! What then ?? This on a nissan 2018 frontier king cab 4cyc. It's not on water pump. it just turns with the serpentine belt but why do need that type of fan and not one that turn with the motor when u start it
i have a 94 previa with a viscous fan clutch, didnt even know about it, i do coolant change every 2 years, should i change this fan clutch out at this point?
It’s overheating on medium hills and freeway I tested today. It cools down on hidle. I did not let it go to 250 at all . Tomorrow I will do all my cooling system I appreciate your insight on you tube. Hopefully I will not need a new engine but if I do I will look for you. Question a sprinter 3500 loaded heavy like the RV 10k pounds , where I live is freaking hot and I only go to hot places on summer do you think I can by pass the thermostat? I will replace the whole cooling system . I usually do not drive on winter or go to cold places.
@@silasf94 You shouldn't need to bypass your thermostat even setup that heavy. Just replace most of the old cooling system, including radiator, and take it easy.
@@kansascitysprinters79 I have a 2008 sprinter 3500 RV loaded. I have already replaced the thermostat and changed the fluid. However, it is still hitting high temperatures of 248 and then the light comes on. I ease off, turn off the air and it goes back down. I did your test with a piece of paper when I pulled over, but the fan was working well and going full blast. The paper did not bother it or stop it. What else do you recommend? I am thinking to replace the fan clutch next as you recommend.
Did you need to get the white Sprinter with the good clutch up to operating temperature before doing the test? Also is it possible to disassemble the clutch and replace the fluid on a Sprinter?
I did not. That's the torque the clutch creates when it's not fully engaged. The test would be more definitive If you were to get it up to whatever the target temperature is. I've never heard of a serviceable fan clutch. And they're cheap enough that I wouldn't bother with trying to repair one.
Well, this is a good start but often these fans don't lock up when they need to or as completely as they need to. This test does NOT guarantee the clutch is good. Sorry for the bad news. My research suggests you need to check the rpm of the fan when it's running over 200 degrees.
