Dave:
I can't comment much about the pistons. However, you might do a thread search
on the SAOCA site for "oil pressure relief valve." A number of us have been
down that road and there are some fixes that can be performed to make those
valves work like they should.
http://www.sunbeamalpine.org/
Paste the link above into your browser and go to the "forum" page. From there
you can do a search for what you need to find.
Best of luck,
Andy Walker
Edmond, OK
---- D W Spearing via Alpines <alpines@autox.team.net> wrote:
> Hi,A few years back, about five, I rebuilt my Sunbeam Alpine 1725cc engine. I
> had to bore it out to .040 over and I used some pistons purchased from
> Victoria British. They did not look like any other pistons that I have ever
> seen, and I have see quite a few, as they had a slot down the camshaft side
> rather then the usual four holes up near the oil ring groove. I expected a bit
> of oil use after the overhaul, but it kept getting worse and worse, not
> better, to the point that I was laying down a blue cloud as I drove; it sure
> kept people from following to close! Last fall I pulled the engine apart and
> discovered that all of the pistons had broken skirts and the oil rings did not
> appear to expand as I had expected (photo at :http://www.madbrits.org/DS.gif)!
> Further the oil pressure pegged and ruined the pressure gauge! So the
> questions are: Where do I find better quality .040 pistons? and does anyone
> have a working oil pressure relief valve which will fit a 1725 cc Alpine
> engine (I have not checked it out yet, perhaps a cleaning is all I need)?
> ~~~~~~~~~~~~~~~~~
> 73 de Dave KB9CSW
> ~ ~ ~ ~ ~ ~ ~ ~ ~
> David Wm Spearing
> kb9csw@juno.com
> ~~~~~~~~~~~~~~~~~
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