[Mg-t] TD losing oil

[John Deikis]

The infamous British Archimedean scroll! Sorta worked when new, but leave much
to be after a few years. Manley Ford put a Brown & Gammons seal and flywheel
on my XPAG before the Reno trip. Never saw a drop come out of the cotter hole.
Checked the dipstick...there was oil in the sump.
-John
P.S. Stu: missed
 you on the trip. It was hot but a great experience. Not entirely successful
car-wise, but still worth the effort.


Raising donations for children's cancer research
by driving a 53 MG TD on the Rallye to Reno

Read about it at www.kidsCURE.blogspot.com

On Jun 23, 2011, at 1:36 PM, "mgbob at juno.com" <mgbob at juno.com> wrote:

> Hi Stu,
>  Long ago, you were considering installation of a catch cup under the
cotter
> pin, something that had been written up in TSO.  Did you do it?
>  If you did, how much oil is draining into that cup over a period of time?
>  It's quite possible that, despite the scroll and the seal, some oil is
> sneaking out while driving. When stopped, the drips are more evident.
>  A spot the size of a silver dollar, the real silver dollar, not the one we
> see today, is made by only ten drops or so.
>  You probably do have a seal problem; everyone does to some extent.  But
> also, these engines do burn oil; it's just not all that visible. Original
> valve seals are not that great. Because your gearing runs the engine slower
at
> highway speeds than most,  oil moving past the rings could be less in your
> engine than others, at road speed.   Do the spark plugs show signs of oil
> burning?
>  Did you go to Reno? What was the consumption on that trip?
> Bob
>
> ---------- Original Message ----------
> From: Stuart Keen <simbafish at comcast.net>
> To: MG <mg-t at autox.team.net>
> Subject: [Mg-t] TD losing oil
> Date: Thu, 23 Jun 2011 07:16:02 -0400
>
> My MGTD has recently been losing oil. Basically now getting what the
original
> Operator's Manual states: about 500 miles to a quart of oil when driving
> fast.
> I usually drive between 60 and 70 mph. But most of the loss appears to
> happen,
> not while driving the car, but when I stop for lunch, rest stop etc. Then
> there is a sightly puddle of oil underneath. Last night I verified that the
> oil was coming from the cotter pin hole. This makes me suspect I have a
rear
> crank shaft seal problem. But then why does the oil appear to come out all
at
> once and not while driving? TD performs perfectly otherwise. Just drove 320
> miles to St Augustine, FL. yesterday. Air temp was 91, water temp high was
> 88,
> oil pressure normal at approx 63. Since most of the oil loss appears to be
> coming from the cotter pin, I do not think I have oil ring problems. Any
> suggestion would be appreciated.
>
> Stuart Keen
> 1951 MGTD MK II
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