The car has 54k miles on it (hasn't wrapped around).....When I drove home,
the oil pressure stayed higher, at idle (750rpm) it was right at 25psi.
Cruising was just over half scale. The ambient air temperature was low 80s
and the temp guage stayed right at the middle of the scale (very slightly
less than on the long drive earlier in the day).
ROBERT G. HOWARD wrote:
> Hi John,
> Do you have a lot of miles on that engine? My 75 got driven a lot on
> the highway in Florida, and its pressure stayed right up there at highway
> speeds. It would be lower at idle for the first few minutes after coming
> off the highway, but would then return to normal idle pressure as the oil
> cooled. At that time I was using 10-30 also.
> If you have high mileage, you might consider John Twist's suggestion
> that you change the connecting rod bearings every 80,000 miles. We
> recently did that on a club member's 76, a car that had a real DPO who
> flogged it. The pressure went from 10 psi at hot idle to about 35, and
> to about 70 on the road. That's still not right, of course, but it will
> keep the lassie from exploding the engine while she saves her pennies to
> afford a proper rebuild.
> Bob
>
> On Thu, 09 Apr 1998 14:54:26 -0500 John Steczkowski <stecz@pswtech.com>
> writes:
> >I have a '75 MGB (no oil cooler, no electric cooling fan). I just
> >drove
> >it a relatively long distance (55 miles at 75 mph or so) in one
> >sitting
> >and I noticed towards the end of that run, the temp gauge was on the
> >second dot (just past the middle of the guage) but my oil pressure was
> >much lower than normal, 50 psi cruising, about 15psi idling. I'm used
> >to
> >it being at about 70-75 psi at cruising speeds 25 psi or so idling. I
> >have 20w50 oil in it. Do I have anything to worry about, or am I ok
> >still? I need to wait until I drive home and see if, towards the end
> >of
> >my drive (12 miles or so) if the pressure is that low.
> >
> >I am planning on an oil cooler, but I wanted to wait a month or two
> >before I splurged on that, but....
> >
> >--
> >John Steczkowski
> >Director, Business Systems Solutions, Central & West
> >PSW Technologies, Inc.
> >512-343-6666
> >stecz@pswtech.com
> >http://www.pswtech.com/~stecz
> >http://www.pswtech.com
> >
> >
> >
>
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--
John Steczkowski
Director, Business Systems Solutions, Central & West
PSW Technologies, Inc.
512-343-6666
stecz@pswtech.com
http://www.pswtech.com/~stecz
http://www.pswtech.com
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