[ROVERNET - UK] Oil pump, Oil Change Warning

[Jane Gould]

Hi Rovernetters

Just a quick note for  you all ,, the oil pressure relief valve spring  is 
prone to getting very tired ,,, when new it is (I believe ) set at 28 PSI 
,,, when it is "tired " it is probably much less than that . !!!!

The prv spring for an MGB V8 is set at 45 PSI . ----the rest of the engine 
in the MG is identical to a P6 .


I have several times over the 19 years that I have been a Rover P6 
specialist heard a P5 /P6/SD1  rattling its way to the workshop with a very 
dismal owner expecting to get a huge bill for a new engine ,,, only to find 
that when the PRV spring is replaced with a new one ,,,, All goes quiet ,, 
oil pressure is restored , ----Customer gets a bill for several pounds ,,, 
(instead of a grand or two )

the springs are only  a pound or two ,,,, EVERY new Rover V8 customer of 
mine gets a new spring ,, Some of them don't even  know that a new spring 
has been fitted because I forget to put it on the bill !!----But they 
usually notice that the oil pressure is suddenly back to where it was when 
they bought the car new   -----A new PRV spring will not , of course restore 
good oil pressure to a totally knackered engine
----- Original Message ----- 
From: "Robert Heimerl" <robertime at cavtel.net>
To: <agale at iinet.net.au>; <rovernet at lyris.ccdata.com>
Sent: Wednesday, August 22, 2007 5:41 PM
Subject: RE: [ROVERNET - UK] Oil pump, Oil Change Warning


> Hi Alan,
>
> Not exactly.  The key seems to be replacing the filter
> almost immediately, otherwise one really does risk the oil
> pump losing its prime.  I changed the oil on my previous SD1
> many times, always replaced the filter within minutes --no
> problem.  In this case, I had a reason for leaving it off
> longer, perhaps a few hours -- was unaware of the risk,
> naturally, until I began researching the subject after the
> oil pressure did not come back.  My first clue was valve
> lifters that didn't quiet down, oil guage reading near zero
> -- previously much higher (and yes, I checked the sending
> unit connections right away).
>
> Based on the manual, the magazine article and a couple of
> conversations, I'm sure I'm not the only one who's
> experienced this problem.  Anyone else with a story on this
> subject that they're willing to share?
>
> Robert H.
> Arlington,Virginia, USA
>
>> You mean that each time I have been draining the sump,
>> then removing the oil filter, replacing it with an empty
>> one and then filling the sump I have been risking a dead
>> engine? You would have thought that by now (15 years
>> ownership) the death would have happened.
>> Alan Gale
>> Western Australia
>>
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