A tale:
The only Roadster engine I have rebuilt had the block taken to a "certified
rebuilder" in Miami Fla.
He had all the equipment and had many short-blocks in and out during the time
my unit was there for cam bearings, & crank grinding. I purchased all rebuild
items from this shop as well. (gaskets. rings, bearing shell, etc. When I
assembled the works, I notice that #3 rod journal was way wide, but freshly
ground and radiused. I felt this could not possibly help on the oil pressure
issue and confronted the owner on this detail. There was a rather heated
debate regarding my ability to set up a crank grinder, and how much of an idiot
I must be to even think about such details. I left dissatisfied, the oil
pressure always seemed low, but no problems were seen for the short while I had
the car. Still I think an engine rebuilder may tell us ten thou is enough end
clearance on a journal if we are trying to maintain oil pressure.
Regards
Calvin Grandy
Vermont
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> From: Toby B <toby@wolfenet.com>
> To: a roadster list <datsun-roadsters@autox.team.net>
> Subject: Lots of Oil pressure...
> Date: Wednesday, November 17, 1999 1:18 PM
>
> Except,
> of course, for my BMW 2002 which IDLES at 60 psi and routinely hits 80
> in normal driving. Almost 100 when cold. And, yep, that's normal!
> (well, the popoff is designed to start opening at 70 psi)
> BTW, the 'bearing shells' in the bottom ends of motors are really
> misnamed- they're more like 'oil controllers' since the crank and rods
> are actually floating on a thin film of oil. The oil is the bearing
> surface.
> So change your oil regularly!
> Toby
>
>
> PATRICK P. CASTRONOVO wrote:
> >
> > All vehicles have zero oil pressure at idle. That is not to mean there is
> > not oil being pumped to the bearings and rocker arms. There is oil being
> > moved through the lines, but not at such a rate that it will show pressure.
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