Date: Tue, 25 Feb 2014 23:44:54 -0700
Reply-To: OlRivrRat <OlRivrRat@COMCAST.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: OlRivrRat <OlRivrRat@COMCAST.NET>
Subject: Re: Mann Oil Filter and lifters Was:Engine Starting Problem
In-Reply-To: <004501cf32b0$1fcee780$5f6cb680$@hiwaay.net>
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That's a very interesting analogy but it's Really NotQuite ThatSimple when it comes to Oil being pushed around
inside an Engine where there are Numerous Different Spaces that need Lubrication, that have lots of Diff'Volumes with
Many Diff'Tolerances ~ Oil, like AnyFluid, whether it is UnderPressure OrNot, will Always TakeThePathOfLeastResistance
& Most, IfNot All, Fluids are Thicker when cool than they are when warm ~ When Cool Thick Oil, on it's Journey through
an Eng', comes to a ForkInTheRoad & 1 Fork is a TightSqueeze & the other is not, the TightSqueeze will get ByPassed ~
& the Surfaces down that Road will have to wait 'til the Oil is WarmEnough &Therefore ThinEnough to TakeThatRoad ~
Of course, if an Eng' has always been run with ThickOil, A Lot of the Damage may already have been done & so an
Oil with a SlightlyHigher "CoolViscosity" number May be in order ~
ORR ~ DeanB
On 25 Feb , 2014, at 10:03 PM, Tom Hargrave wrote:
> Your oil pump is a constant displacement pump and it will pump the same oil
> minus any that may leak back regardless of the oil thickness for a given
> RPM. This is because oil is not compressible.
>
> Thicker oil has higher viscosity and thicker oil will not bleed out of your
> lifters as fast as thinner oil. Thick or thin, the same volume of oil will
> pump into your oiling system at a given RPM, but thinner oil will leak back
> across the pump and leak through the bearings faster than thicker oil.
>
> You can compare at your oil system to a vey leaky bucket and your oil pump
> to the faucet at the end of a hose. With your oil system, the leaks would be
> all of your bearings + whatever bleeds back across your oil pump.
>
> Turn the water up (increase your engine RPM's) and the water level
> rises in the bucket (your oil pressure goes up)
>
> Turn the water down (decrease your engine RPM) and the water level
> drops in the bucket (your oil pressure goes down)
>
> Turn the water up high enough, the water bucket over flows (your oil
> system poppet valve opens and the excess is dumped back in your crank case)
>
> Thicken the water so your leaks slow down (run higher viscosity oil)
> and the water level rises in the bucket (your oil pressure goes up)
>
> Thanks, Tom Hargrave
> www.kegkits.com
> www.stir-plate.com
> www.towercooler.com
> www.grow-sun.com
> www.raspberryproject.com
>
> Did you try to call & I did not answer? I apologize but I never answer
> numbers I don't recognize because I'm tired of sales people trying to sell
> me life insurance, health insurance, Obama insurance, merchant services,
> very expensive money and the latest, greatest "guaranteed to make millions"
> investment.
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM] On Behalf Of
> Richard A Jones
> Sent: Tuesday, February 25, 2014 10:16 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: Mann Oil Filter and lifters Was:Engine Starting Problem
>
> Tom Hargrave wrote:
>> No brand of oil filter will fix this but thicker oil will reduce or
>> eliminate the symptoms.
>
> How does thicker oil pump up a lifter quicker in an icy cold engine?
>
> ORR told us:
>> If you Switch to a 10 or 5 or even 0W** Oil that ColdLifterSyndrome
>> will most probably be diminished or may even go away completely ~
>
> Which is it?
>
> Richard
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