[Healeys] Dave Dougan's overdrive part 2

[Bob Spidell]

Fair enough; however, I refuse to believe any but the heaviest particles 
settle immediately to the bottom--non-detergent oil  or not--while a 
gearbox is operating.  I can imagine the oil being furiously stirred and 
slung at high speeds--I doubt a steel marble would settle while running 
but, sure, while the car is sitting heavier crud will settle.  Plenty of 
damage could be done before any particles get a chance to settle; 
detergent oil or not.   Like I said, the heavier ferrous particles end 
up on the screen or magnets.

AFAIK, ashless dispersant (detergent) oils were formulated to clean out 
or suspend light combustion byproducts; i.e. carbon, etc. ('ashes').  I 
doubt it'll keep heavy particulates in suspension any better than 
non-detergent.  Any tribologists on the List that can address this issue?

This site is interesting (can't vouch for its veracity):

http://www.nordicgroup.us/oil.htm#How%20Sludge%20is%20Prevented

bs



Dave Porter wrote:
> Before I defer to the Factory recommendations let me just say that if you
> were correct in the residues acting as a lubricant, then there would not be
> evidence of galling at the operating and accumulator piston bores.
>  All those crunches into 1st and reverse end up comingling, as do the brass
> bits from the thrust washers/spacers on the laygear and O/D mainshaft. The
> designers foresaw this and specified non detergent to separate solids from
> liquids. 
>  Seems logical to me.. just saying...
> Dave
>
>
> *******************************************************************
> Bob Spidell           San Jose, CA            bspidell at comcast.net
>
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>
>
>
>   


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Bob Spidell           San Jose, CA            bspidell at comcast.net

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