Well OK.... let me display my ignorance.
I was always under the impression that motion of the crank shaft did not
pass through the oil in the pan. That is, the oil level in the pan was
lower than the crank.
However, others have posted in other threads that part of the cam
lubrication depends on splash and therefore one should not run the
engine at too low of an RPM for long periods of time. Where is this
"splash" coming from?
It would seem reasonable that if the engine's crank does not pass
through the oil in the pan, there would be much more oil "churn" in the
transmission than in the engine, which could lead one to think that
foaming of a detergent oil in the transmission was possible.
Don Malling
Gerald M Van Vlack wrote:
> My guess is that they foam because of the constant turning of the gears in
> the oil bath. That would or could lead to pressure build up and leakage past
> the seals (more than the calculated and engineered leakage).
> In an engine foaming (if any) would be while coating the cylinder walls or
> lubricating the moving parts but not while sitting in the pan waiting to be
> pumped back through the system.
>
> JVV
>
> ----- Original Message -----
> From: "Don Malling" <dmallin@attglobal.net>
> To: "Triumph Mailing List" <triumphs@autox.team.net>
> Sent: Friday, February 20, 2004 10:35 AM
> Subject: Re: Fluid for Overdrive Transmission
>
>
>
>>John Esposito at quantumechanics.com says that detergent oils should not
>>be used in an OD because they foam.
>>
>>Is there a reason why a modern detergent oil would foam in a gear box
>>but not in an engine? Or do they in fact foam in an engine as well, but
>>it matters in a gear box but not the engine?
>>
>>Don Malling
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