The silicon, as Wally says, is from Toyota - the dealer I went to, after several failures to comprehend at non-dealer outlets, took one look at the part number, and 'How many would you like sir?' - 08816-03001 for 18ml, mine took 2 as Wally indicated.
The little rod can only be pushed in, along the axis of rotation of the fan.
I have read somewhere that this changes the distribution of the oil so it does more torque transmission, but couldn't lay my hands on any docos right now.
Anyway, I left mine face down in a bowl overnight, and nothing leaked out, so the only test now is will it hold up under temp loads.
What I used was the 3000 CST - Toyota Part number 08816-03001. I did not know there was a choice. This is what the counter man ordered up. Get two bottles - mine took over one and a half.
At 05:22 PM 5/15/01, Bry in Virginia wrote:
>Hi Wally & list,
>Toyota dealer says there's three types of viscous fan clutch silicone. They are rated at 3000 CST, 4000 CST, and 10,000 CST. All priced the same. Parts jock didn't know what the difference was, or even what CST means. Any guess as to which to use?
I would go with the 10,000 CST, as it would be the thickest and would transfer more power to the fan. I would appreciate it if you could get all three Toyota P/N, related to the viscosity.
Subject:  Re: Toyota viscous fan silicone
>I would go with the 10,000 CST, as it would be the thickest and would transfer more power to the fan. I would appreciate it if you could get all three Toyota P/N, related to the viscosity.
I'll probably regret this but I went with the 3,000 Cst.
The only reference to this stuff that the Toyota parts jock could find,
was a TSB from 1975 specifying the fill procedure for the clutches of that year, which evidently arrived empty.
The 3,000 Cst. was for all Toyotas except for the Celica, which got 6,000 Cst. The 10,000 Cst. was not assigned an application by the TSB. He guessed maybe the Land Cruiser but didn't really know.
Anyway, the part numbers are 08816-03001, 08816-06001, and 08816-10001, respectively.