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petermerle
Expert
Date registered: Apr 2006
Location: Cape Town ( deep south )
Vehicle(s): W460 *1, W123 *2, W124
Posts: 1315
| Clutch fan service
Has anyone done this to their viscous fan? My W124 fan unit is suspect - new one costs over $400 here.
http://www.nichols.nu/tip482.htm
Peter |
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Roly
Elite Veteran
Date registered: Apr 2006
Location: Australia
Vehicle(s): 1999 G500
Posts: 661
| RE: Clutch fan service
I don't know of the repair so can not comment. I do have a new spare viscous coupling for a om 603. It has three holes for the fan and my G engine has four so it's no good to me. What engine/fan are you replacing? |
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petermerle
Expert
Date registered: Apr 2006
Location: Cape Town ( deep south )
Vehicle(s): W460 *1, W123 *2, W124
Posts: 1315
| Re: Clutch fan service
Mine is also 3 holes for fan , its for OM603.912 engine ( W124 non turbo ). I have got the Toyota fluid and will try the repair procedure this weekend
Peter |
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kerry460
Elite Veteran
Date registered: Apr 2006
Location: tasmania australia
Vehicle(s): 1984 300GD LWB WAGEN
Posts: 611
| RE: Clutch fan service
G,,day i managed to make mine pretty good,
it is slow work to get the silicon fluid in , pull the front and the brass pin ,heat the hub with hot air gun or hair dryer , as the hub is cooling ad drop by drop and the contraction sucks it in ,
mine took over 30 millilitres , 2 tubes of toyota silicon .
so far its working fine.
but as i said it is slow work ,heating, filling to get enough in .
cheers kerry |
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AlanMcR
Expert
Date registered: Apr 2006
Location: US, CA, Los Altos
Vehicle(s): G300DT E300DT 230SL
Posts: 3500
| RE: Clutch fan service
Are you sure the problem is the fluid and not just a miss-adjusted bi-metallic strip? When I got my G it the fan roared at all temperatures. Some careful bending got the fan to engage at reasonable temperatures. Perhaps yours is bent the other way?
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petermerle
Expert
Date registered: Apr 2006
Location: Cape Town ( deep south )
Vehicle(s): W460 *1, W123 *2, W124
Posts: 1315
| RE: Clutch fan service
Well I "serviced" the fan coupling and now its probably too "stiff" but have left it at such . I filled it up with approx 2/3 of a tube of Toyota fluid 08816-10001. This took approximately 1.5 hours , one drop at a time. I heated up the coupling with a hot airgun for a few seconds and then then placed it in a pool of cold water - this draws the fluid it - about 5 drops worth after which you have to reheat it which drives out the air bubbles.
Peter
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kerry460
Elite Veteran
Date registered: Apr 2006
Location: tasmania australia
Vehicle(s): 1984 300GD LWB WAGEN
Posts: 611
| RE: Clutch fan service
G,,day not surprised you may have been unsure of my posts here and elsewhere (AGOA)
as the front of my hub has the brass pin in the centre, not to the side.!
this could also explain the subtle differences in opperation.
i also possibly put in too much, but better to have it working more than not at all.
glad it has worked for you.
cheers kerry |
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amzimmy
Elite Veteran
Date registered: Apr 2006
Location: South Africa/Italy
Vehicle(s): GD300 1981, Alfa GT 3,2 V6, Alfa Brera Q4 3,2 V6.
Posts: 850
| RE: Clutch fan service
Hi Peter, I have been following with great interest your tread about "refilling" the viscus fan with the Toyota fluid 08816-10001. I have a spare viscus fan that I have replaced with a new one some time back. I would like to try and revive this old viscous coupling and I was thinking if one would drill a small additional hole opposite the filling hole and insert a little nipple, then with a small vacuum pump "suck" the fluid. Would that be possible? Would that make the whole operation simpler?
Just a thought, since I would like to keep one working coupling as spare.
amzimmy  |
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petermerle
Expert
Date registered: Apr 2006
Location: Cape Town ( deep south )
Vehicle(s): W460 *1, W123 *2, W124
Posts: 1315
| Re: Clutch fan service
I suppose you could do that , must be careful where you drill as you might damage the "impeller". Does your G have a viscous coupling ?- I am surprised as I thought all SA 240GD/300GD has the "tropical cooling" special version option which entailed having a solid fan coupling and a 70degC thermostat. The coupling I have shown in thread is from my W124 300D ( OM603 )
Peter
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amzimmy
Elite Veteran
Date registered: Apr 2006
Location: South Africa/Italy
Vehicle(s): GD300 1981, Alfa GT 3,2 V6, Alfa Brera Q4 3,2 V6.
Posts: 850
| Re: Clutch fan service
Peter, my 300GD has a viscous fan coupling, however the engine (car engine) was retrieved from the scrap-yard and then modified. I have had no issues with overheating. Have you opened such a viscous coupling before?
amzimmy
Edited by amzimmy 12/29/2009 10:57 AM
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petermerle
Expert
Date registered: Apr 2006
Location: Cape Town ( deep south )
Vehicle(s): W460 *1, W123 *2, W124
Posts: 1315
| Re: Clutch fan service
No not the OM617 type - should be similar.
Peter |
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kerry460
Elite Veteran
Date registered: Apr 2006
Location: tasmania australia
Vehicle(s): 1984 300GD LWB WAGEN
Posts: 611
| RE: Clutch fan service
G,,day i would be very hesitant to drill into the hub,
how can you keep the swarf from dropping inside.
grease can be used , but 1 bit of swarf inside ????
that is why i tried , and came up with the heating method ,then contraction to suck the silicon in..
so far my method has been succesful.
kerry |
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amzimmy
Elite Veteran
Date registered: Apr 2006
Location: South Africa/Italy
Vehicle(s): GD300 1981, Alfa GT 3,2 V6, Alfa Brera Q4 3,2 V6.
Posts: 850
| RE: Clutch fan service
kerry460 - 12/29/2009 9:50 AM
G,,day i would be very hesitant to drill into the hub,
how can you keep the swarf from dropping inside.
grease can be used , but 1 bit of swarf inside ????
that is why i tried , and came up with the heating method ,then contraction to suck the silicon in..
so far my method has been succesful.
kerry
Kerry, that was only a thought of mine, to maybe simplify the procedure, I do not know how the inside of the Viscus coupling looks like, and I have looked (Googled) to find some info about this but no avail. I probably will open up such coupling and see what are the mechanics inside.
My further thought is that if you have the vacuum and "suck-out" the air,fluid and so possibly all the "shavings" as well. The vacuuming would be through a sealed glass jar so one can monitor all the stuff that's being sucked.
Does that make sense?
amzimmy
Edited by amzimmy 12/31/2009 2:03 AM
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kerry460
Elite Veteran
Date registered: Apr 2006
Location: tasmania australia
Vehicle(s): 1984 300GD LWB WAGEN
Posts: 611
| RE: Clutch fan service
G,,day good idea ,
but bits of swarf can and do get lodged in nooks and crannys.
with my way , bloody slow , but at least you know whats going in.
i may still buya new one while still available,
but at the moment things are good.
the german thermostat i fitted made a big difference to the overall cooling performance.
sorry not sure how much info is on here or on agoa.
cheers kerry
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mortinson
Expert
Date registered: Apr 2006
Location: Madrid, España
Vehicle(s): '98 G300TD LWB, '98 E300TD Saloon
Posts: 1355
| RE: Clutch fan service
I can't vouch for these but for the asking price they're certainly worth a try. Thus you don´t get your fingers burntª
http://www.gts-shop.de/mercedes-7.html
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petermerle
Expert
Date registered: Apr 2006
Location: Cape Town ( deep south )
Vehicle(s): W460 *1, W123 *2, W124
Posts: 1315
| Re: Clutch fan service
Looks like its mostly Chinese stuff
Peter |
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mortinson
Expert
Date registered: Apr 2006
Location: Madrid, España
Vehicle(s): '98 G300TD LWB, '98 E300TD Saloon
Posts: 1355
| RE: Clutch fan service
I don't know. The manufatured is stated as "DIV": http://www.gts-shop.de/div.html
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petermerle
Expert
Date registered: Apr 2006
Location: Cape Town ( deep south )
Vehicle(s): W460 *1, W123 *2, W124
Posts: 1315
| Re: Clutch fan service
If they don't tell you specifically and they DIV seems to make everything from Starter motors to radiators to cylinder heads ( this clinched it for me ) then they will be Chinese. In fact I find it amazing that the Chinese are making so many parts for the old cars - there must be money in it!
Peter |
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grazza
Veteran
Date registered: Apr 2010
Location: Australia
Vehicle(s): W460 230GE 1988 - OM606 turbo diesel, 722.608 auto
Posts: 277
| RE: Clutch fan service
Sorry to dig up this old post but I may have to use it if my viscous fan is playing up...if.
So can someone help with a good way to test the fan. I have done some looking on the net and there are a lot of different and seemingly dangerous methods.
I have got the my 230GE up to temp and them stopped the motor, then tried to turn the fan, which it did with "some" resistance. So when I spun it, it stopped quickly after I let go and did not run on much.
I am not sure if this is a good check - does anyone know have a surefire method?
thanks |
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mortinson
Expert
Date registered: Apr 2006
Location: Madrid, España
Vehicle(s): '98 G300TD LWB, '98 E300TD Saloon
Posts: 1355
| RE: Clutch fan service
grazza - 9/15/2010 9:43 AM
Sorry to dig up this old post but I may have to use it if my viscous fan is playing up...if.
So can someone help with a good way to test the fan. I have done some looking on the net and there are a lot of different and seemingly dangerous methods.
I have got the my 230GE up to temp and them stopped the motor, then tried to turn the fan, which it did with "some" resistance. So when I spun it, it stopped quickly after I let go and did not run on much.
I am not sure if this is a good check - does anyone know have a surefire method?
thanks
The only way that I know of of testing the viscous coupling is to throttle the engine with the bonnet open... you must hear the sound of a thousand male elephants in season chasing a female and notice the corresponding amount of air being sucked out of your radiatior...
Edited by mortinson 9/18/2010 3:09 PM
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