GQ viscosse fan

Submitted: Friday, Feb 28, 2003 at 12:03

ThreadID: 3583 Views:1861 Replies:5 FollowUps:4

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Mark

I read last night from someone that you can top up the oil on the viscosse fan. I am having a problem with my 92 efi GQ overheating slightly. Can you top up the oil in a GQ and if so where does it fill from and what kind of oil does it use. Any help would be appreciated.

Mark.

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Reply By: David - Friday, Feb 28, 2003 at 12:18

Friday, Feb 28, 2003 at 12:18

Am about to do mine ('90 Maverick) - it doesn't cut in at all, even when the engine is close to boiling.
I then fitted an additional electric fan and that has helped tremendously, but for the really hot stuff (and I'm about to turbo or supercharge) I need more grunt- hence my imminent repair of the viscous fan. I have my fan on the work benck ready to go- can't see any fill holes so will just have to split it in two when I get the Toyota Silicon fluid sometime very soon....
Do a search and you'll find plenty of info. cheers

AnswerID: 14151

Follow Up By: David - Friday, Feb 28, 2003 at 12:38

Friday, Feb 28, 2003 at 12:38

This from a guy who did his Toyota fan- probably identical I guess

"Separate the two half's and be careful not to damage the O-ring. The O-ring always seems to get stretched out.

The manual says to use 50mL of 3000Cst. silicone fluid to refill the fan clutch. Each bottle is 18mL. Toyota P/N 08816-03001

After cleaning out all of the old silicone from the fan clutch half's, add about 50mL of silicone to the lower half of the clutch. This should be just enough to fill the holes and not overflow into the O-ring groove.

The fan clutch is full of silicone and the O-ring is in the back half of the groove. Note how the O-ring has stretched. Some people cut out a small section of the O-ring and super glue it back together, but I didn't do that......

I placed the top of the clutch on the back of the O-ring and used a small flat blade screwdriver to push the O-ring back into it's groove. You must apply some pressure on the top piece to prevent the O-ring from popping out of the groove.

Reinstall the outer philips screws to secure the cover, install the fan, and you are all done."

There were a few fotos attached but they don't really tell you much..

FollowupID: 8439

Reply By: Gerry - Friday, Feb 28, 2003 at 12:44

Friday, Feb 28, 2003 at 12:44

Had the same problem last year. The only way to split the original clutch unit is on a lathe - not really practical as you then need to then find a way to hold it back together again. I solved my problem by adapting a unit from a Ford Falcon (not sure which model etc.) It's an 18 inch 7 bladed steel fan (the Patrol plastics are renowned for cracking). It cost me $50 the lot from the wreckers and it works a treat!

To adapt it, remove the shaft from the original Patrol clutch unit so that you have the end that fits on to the water pump. Next, get the thread off the end of an old Falcon water pump (this is the thread that the Ford clutch unit screws on to) and with the use of a lathe and a welder, graft the Ford thread onto the Patrol shaft. Keep the finished "adaptor" fairly short and it fits in beautifully! Best thing I ever did - solved all my cooling problems.

Cheers
Gerry

AnswerID: 14153

Follow Up By: David - Friday, Feb 28, 2003 at 16:19

Friday, Feb 28, 2003 at 16:19

Thanks Gerry- but why do you need a lathe???
Mine LOOKS as though it will just come apart when I undo the bolts around the edge- then replace the silicon, carefully refit the O ring and bolt it back together. Why would I need to use a lathe- I am confused???

FollowupID: 8459

Follow Up By: David - Friday, Feb 28, 2003 at 16:25

Friday, Feb 28, 2003 at 16:25

P.S. Gerry- I had a close look at the fotos from the guy who did it on his Toyota- about 6 fotos as he did it step by step. The clutch looks identical and is the same brand as the one on my Nissan so I don't know why I might need a lathe- thanks for your response........

FollowupID: 8460

Reply By: Mark - Friday, Feb 28, 2003 at 12:44

Friday, Feb 28, 2003 at 12:44

Thanks for the quick responces

Mark

AnswerID: 14154

Reply By: peck - Saturday, Mar 01, 2003 at 13:40

Saturday, Mar 01, 2003 at 13:40

How many horsepower does a radiator fan consume? Is the hill that steep that you need every last HP to get up? I had same problem on my HZ troopy (actually the little bimetal themostat spring on the front rusted) and it took some time to work out why engine got so hot going slowly up hills. Went thru process of trying to fill the damn thing (got sample of silicone from Dow ... $0) and even tapped hole with plug so it would be easy next time. Finally got smart and locked fan up so clutch didn't work. Never had any more problems!

AnswerID: 14232

Reply By: peck - Saturday, Mar 01, 2003 at 13:41

Saturday, Mar 01, 2003 at 13:41

AnswerID: 14233

Follow Up By: David - Sunday, Mar 02, 2003 at 10:08

Sunday, Mar 02, 2003 at 10:08

Actully it is quite a lot of power...
Back in my petrol head days with a Hot V8 Holden, we measured the difference at the wheels... something like 4 or 5 HP. Certainly enough to make a difference in these days of astronomical fuel prices.. Of course I'm getting so much power from my TD42 that the power loss wouldn't concern me...cough ..cough.
It's probably the noise that would annoy me more though.
I agree that locking it up is an option -but that is one I'm trying to avoid.

BTW Peugeout had the best setup on some donks incl my old man's diesel- a totally freewheeling waterpump mounted fan - which locked solid when necessary with an aircon style electromagnetic clutch. Best of all worlds- worked a treat!! If I knew how to adapt one I would.

FollowupID: 8567