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Author Topic: viscous fan  (Read 9696 times)

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Seth

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Re: viscous fan
« Reply #75 on: 02 May 2009, 19:53:34 »
Mine's pretty well the same as this ......

Brand-new rad, thermostat and water pump - normal running is around 92C, but show it a climb with the caravan in tow, and it'll creep up towards 100C. Once the climb is over, it quickly returns to 92C. Keeping the lump revving hard, does however help, so I now adjust my driving technique to take this into account. Viscous fan is fitted, but has never cut-in.

Going to give the cooling system a heavy flush with Forte soon.
« Last Edit: 02 May 2009, 19:54:42 by Reliance505 »
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chartz

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Re: viscous fan
« Reply #76 on: 03 May 2009, 09:11:51 »
Thanks.
What is Forte?
If the radiator is new, could the engine lump be obstruated itself?
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Turk

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Re: viscous fan
« Reply #77 on: 03 May 2009, 23:06:27 »
Forte is a brand name. They do a whole range of automotive products. Not the cheapest, but effective.  Diesel and petrol additives, coolant system flush etc
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Pitchfork

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Re: viscous fan
« Reply #78 on: 04 May 2009, 11:16:59 »
Did someone once post a fix for Viscous couplings that had locked up permanently - by heating them up or something similar?
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TheBoy

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Re: viscous fan
« Reply #79 on: 05 May 2009, 13:23:48 »
Quote
Mine's pretty well the same as this ......

Brand-new rad, thermostat and water pump - normal running is around 92C, but show it a climb with the caravan in tow, and it'll creep up towards 100C. Once the climb is over, it quickly returns to 92C. Keeping the lump revving hard, does however help, so I now adjust my driving technique to take this into account. Viscous fan is fitted, but has never cut-in.

Going to give the cooling system a heavy flush with Forte soon.
Yup, flush the cooling system with Forte.  My old tractor, no matter how driven, never went up above 97C, including some serious ragging up and down mountain passes with the rear not following the front ::)
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chartz

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Re: viscous fan
« Reply #80 on: 05 May 2009, 13:30:40 »
Okay, got that.
But how do you flush with Forte then? Is there a tutorial somewhere?

Thanks.
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TheBoy

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Re: viscous fan
« Reply #81 on: 05 May 2009, 13:45:55 »
Quote
Okay, got that.
But how do you flush with Forte then? Is there a tutorial somewhere?

Thanks.
Nope, follow instructions on the tin.

Remember, on the TD, there is a drain plug for rad, and a drain plug for engine block
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Omegatoy

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Re: viscous fan
« Reply #82 on: 05 May 2009, 20:16:16 »
always found it best to pour it into the header tank then run around for a few days, then at the weekend drain it when engine hot(mind fingers when undoing drain) dont forget to undo the drain on the block, allow engine to cool down and refill with fresh antifreeze etc!!
tin says something like run engine for 10 mins and drain, nope i like it to do a damn good job in there!!! jm2pw
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chartz

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Re: viscous fan
« Reply #83 on: 14 June 2009, 19:17:08 »
Hello,

I've just got my new viscous clutch, and guess what...
It worked for three days before being engaged all the time again (even cold), just like the previous ones !
Stupid question : is my engine eating up the clutches (that one was my fifth in one year) and why ?
I have yet to find a mechanic who can really understand the problem (Opel or BMW).
Leaving it in the boot wasn't really an option. The temperature was approaching 100 °C all too often, and I find this too scary.
Anyway,  :o :( :D :'(
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Re: viscous fan
« Reply #84 on: 14 June 2009, 19:32:00 »
Quote
Hello,

I've just got my new viscous clutch, and guess what...
It worked for three days before being engaged all the time again (even cold), just like the previous ones !
Stupid question : is my engine eating up the clutches (that one was my fifth in one year) and why ?
I have yet to find a mechanic who can really understand the problem (Opel or BMW).
Leaving it in the boot wasn't really an option. The temperature was approaching 100 °C all too often, and I find this too scary.
Anyway,  :o :( :D :'(
If temp going that high, you have a major issue that the viscous may be masking.  I would look into that first.
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chartz

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Re: viscous fan
« Reply #85 on: 14 June 2009, 19:55:11 »
Thanks. It is going that high when the weather is very hot (circa 30 °C) and with five people in the car.
Most of the time, it's 92.5 °C.
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TheBoy

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Re: viscous fan
« Reply #86 on: 14 June 2009, 20:06:57 »
Quote
Thanks. It is going that high when the weather is very hot (circa 30 °C) and with five people in the car.
Most of the time, it's 92.5 °C.
After sorting mine out, never managed higher than 97C, no matter what the temps, how it was loaded, or how it was driven (normally very hard ::))
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chartz

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Re: viscous fan
« Reply #87 on: 14 June 2009, 20:14:33 »
A radiator change would be the order of the day then?
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TheBoy

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Re: viscous fan
« Reply #88 on: 14 June 2009, 20:22:41 »
Quote
A radiator change would be the order of the day then?
Before than, a good coolant flush, and a good oil flush.
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chartz

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Re: viscous fan
« Reply #89 on: 15 June 2009, 06:23:41 »
Coolant flush was done a few months ago, after I had the pump changed. How do you do an oil flush?
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