[Spridgets] Oil Pressure vs Quantity

[Michael MacLean]

The rocker shaft is another source of loss of oil pressure due to wear.
Mike
MacLean



On Wednesday, August 13, 2014 3:40 PM, Kirk Hargreaves
<khargreaves2 at gmail.com> wrote:
 

>
>
>It was the water hose illustration
that allowed me to understand the principle.   
>And I have built a few
engines (small blocks) over the years.  I should have been able to understand
this.  
>
>
>
>Thanks again, 
>
>
>Kirk 
>
>
>
>On Wed, Aug 13, 2014 at 3:37
PM, Kirk Hargreaves <khargreaves2 at gmail.com> wrote:
>
>Thanks all . .  that
did it . . got it through my thick skull (for the first time). 
>>
>>
>>Thanks
so much for the education . . much appreciated. 
>>
>>
>>Kirk 
>>59 1275
keeping oil pressure after ten years on an engine rebuild, daily driving.  
>>
>>
>>
>>On Wed, Aug 13, 2014 at 3:17 PM, Bud Osbourne <abcoz at hky.com> wrote:
>>
>>Decreased discharge volume, due to excessive "lift", is not usually much
of
>>>a problem with a positive displacement pump (which a gear pump is).
>>>However, with a little bit of wear, it can become an issue.  Centrifugal
>>>pumps, on the other hand (an example would be our car's water pumps), loose
>>>volume fast, when the lift distance is increased beyond a certain point.
>>>
>>>Bud
>>>
>>>-----Original Message-----
>>>From: Spridgets
[mailto:spridgets-bounces at autox.team.net] On Behalf Of
>>>
>>>Michael MacLean
>>>Sent: Wednesday, August 13, 2014 3:39 PM
>>>To: Spridget list
>>>Subject:
Re: [Spridgets] Oil Pressure vs Quantity
>>>
>>>
>>>Bud's reply makes sense
and maybe if I had replaced the pump this "symptom"
>>>would have gone away.
 The pressure was rock steady through any kind of
>>>driving, so I think the
pickup was in the right spot.  At the time I knew
>>>nothing of cars.  I just
used the low pressure as an indicator and never had
>>>to remove the dipstick.
 It ran fine until I lent it to a friend that wanted
>>>to visit his
girlfriend in the Marines in Twenty Nine Palms.  He had to
>>>drive from
Hermosa Beach and I told him to just watch the oil pressure gauge
>>>and stop
when the pressure got down to forty.  I even supplied the oil.  I
>>>guess he
was only thinking of one thing while driving out there.  He got as
>>>far as
Needles, California and the engine seized.  He had to buy me a used
>>>engine
from the junk yard to replace the one he killed.  Yes, there were
>>>Bugeyes
in junkyards back then.  After that I had to use the dipstick like
>>>everyone
else.Mike
>>>------------------------
>>>------------------------
>>>
>>>spridgets at autox.team.net
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