From: MV (MV@dc9.tzo.com)
Date: Tue May 02 2006 - 12:59:05 PDT
Air cooled engines just run really hot. If your engine was knocking you
may have a rod bearing problem.
If you change the oil and put in some heavier oil, like 40W and it still
knocks, fix it before the rod comes out the side of the engine.
I say this from experience!
It should not knock even with thin oil. If you are going run an older
aircooled engine hard, 40 weight is a good idea. A lot of the older
engines were designed to be run on 30 or 40 weight oil anyway. 10-30 is
really too thin for many of them.
Dave
Mark W wrote:
> This is slightly on topic, since all mil-veh have oil.
>
> I was doing some sandblasting this weekend and my
> compressor engine started knocking. It is a 10hp
> kohler engine. I had changed the oil recently and it
> wasn’t low. Even after the oil cooled down, it seems
> very thin. I check the oil with the dipstick and when
> I wipe in a rag, the oil seems to absorb in the cloth
> very quickly, which seems to have the viscosity
> equivalent to diesel oil. I had 10W-30 in it and
> maybe I should have had straight 40W in it and maybe
> the engine was running hot. Does anyone know if this
> sounds like viscosity breakdown due to overheating? I
> thought that viscosity breakdown affects how the oil
> sticks to the metal, but when it is cool, it still
> looks normal.
>
> Thanks
> Mark
>
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This archive was generated by hypermail 2.1.4 : Tue Jul 18 2006 - 21:45:32 PDT