Supercharger oil

[Green Dragon]

Originally posted by newthings
Hi Bob,
My oil exit path was around a bolt head. Yours might have been through the gear case to impeller chamber seal. Were you trying to maintain the oil level up to the bottom of the fill hole? Does your new nose cone have the sealed bearings?
Spinning impeller gears make quite a mist generator. (From the mouth of John Conchie.)
I am considering buying a sealed bearing nose cone assembly with the smaller pulley.
Roy

Yes, I filled to overflowing at the hole.

New Nose cone supposed to have sealed bearings.

Has to be gear case to impeller chamber leak to get into intake manifold.

Can't see how IMPELLER gears act as Mist generator as they are supposedly sealed from both the Gear coupling housing & the Nose Cone. Has to be the coupling gear shafts that allow passage

Interesting sidebar to this is

In case of S/C problem-VX will still run good enough to get you home if you remove S/C belt.

When nose cone bearing went out. Being out in the Boondocks & Not having spare S/C oil (I now carry 2 spares) I added Mobil 1 Synthetic 5-30 to try & keep things going. When I disassembled the S/C for repair, I discovered the Coupling (Like Hard rubber) had completely disappeared. I suspect xtreme heat & pressure along with the Synthetic oil was responsible.

As I said if you suspect a problem just remove the belt.

Dragon Bob

[ScottinMA]

I have one of the early Alpine SC and would like to change out the oil. Has anyone done this in the last year or two that might share the location of the fill plug and what type of oil should be used?

Many thanks

[newthings]

Hi Scott,
The fill plug is in the front. It is an allen plug with o-ring, so no need to over tighten. I use GM supercharger oil. GM uses the Eaton S/C on many models. I use a large syringe with a clear hose of about 1/8" inside diameter. I extract by putting about 3" of hose into the gear case and filling the syringe. I keep slurping until I can get no more. I fill the same way with out the hose on the syringe. I fill to about 1/4" below the fill hole bottom. I fill until the oil comes out and then extract back to 1/4" down. If you fill more, you will force oil out the front and you will see it collecting in the gear case cover bolt recesses.
Cheers, Roy

[ScottinMA]

Roy,

Thank you! That's my plan for this weekend. So far, replaced timing belt, both front and rear brakes and rotors, tranny fluids, diffs, transfer all with synthetics, new belts, plugs, alignment, front wheel bearings repack, and I'm considering the radiator next.