[Mini] Oil spitting

[Anne]

Here is some more information;

The result of the RR done last week, when it wasn't spitting oil as much
yet.
RR result: http://goo.gl/QHvbF

And as you can see, while on the RR black (rich) and grey (no idea :))
smoke came out, not blue or white though
http://www.youtube.com/watch?v=lpT_NhzMEEE

If I recall correctly the engine was build in 2000 after the IMM trip.
It's a 1293 with Stage 2 unleaded head (35/29), Hepolite 21253
and Balanced/x-drilled bottom end.
Since then it must have done at the least 85k miles, so yes I was expecting
it to fail at a certain point in time.
As most likely will the gearbox which, apart from the dropgears and clutch,
has been arnoud since 1997 and done close to 240k miles.
I had hoped they wouldn't untill I had had some experience driving with the
charger installed so I would have an idea on what could be an improvement.
Anywhoooo,


We'll do a compression test, and if a leak tester can be sourced also a
blow-by test to see if the pistons/walls/rings are in good order.
Based on the numbers the head may come off to inspect the inside visually.

We'll also try to do a suction test of the carb, while driving.
It shouldn't be to hard to run a tube inside.

Unfortunately it'll have to wait till Monday as the DIY shop is about an
hour from where I live (20min from where Arnoud lives), so I can't hop by
easily to check or work on it.

After doing the tests there most likely will be two choices;

a. cylinders are not in good state

This would mean the mid section (short?) of the engine will need to be
replaced.
Or would I need to consider changing the head at the same time?

Is there an option that would be more suited for a charger, where I might
even do without the decompression plate?
I'm currently at 1293 and would not want to use a bigger bore than that.



b. Change breather setup

This may even be advisable if a. is done.

I can run an additional hose from the dipstickhole and rocker cover and
eventually add one to the mech pump plate a bit like John had on Coo.

The question would be; would I run these to an oil catch tank with an air
tight connection to the carb, as per usual?
Because if the current set up with 1 hose to the carb does not get the
fumes out of the engine fast enough, adding additional tubing but no
additional suction will not change much.

Or will it?

Anne.


On Fri, Apr 26, 2013 at 6:11 PM, Anne <minilists at mibv.com> wrote:

> After the fuel issues was sorted sorted and the clutch keeps working fine
> with the washer installed, it was time for the Van to think of another
> symptom to come up with.
>
> First it tried to impress me with a fairly lack of improvement in bhp or
> torque (+ 4 and + 10 after fitting the charger), but as that did not work,
> it started to throw out the engine oil.
>
> Although initially not directly a problem, I had a look at where all that
> oil was coming from.
> From the pattern it looked like it was being pushed out of the dipstick
> hole. The stick was not really sticking anymore; just lying in there.
>
> After I 'solved' this by plugging the dipstick hole, the oil found other
> ways to get out of the block.
> Somewhere behind the distributor and also a bit past the oilfiller cap.
> That did become a problem, and not just because it really DOES need oil,
> but also because it was now spitting it over the hot parts of the engine,
> resulting in nasty blue smoke getting into the cabin.
>
> Or at least I think that is what that smoke was. At least it is very clear
> it's spitting out the oil in places it shoudln't.
>
> Pictures as always can be found here;
> http://goo.gl/9400P
>
> Assuming the remaing crankcase breather (on the clutch side) was blocked I
> took it off the carb nd checked it. Unforunately (would have been an easy
> fix most likely) there is no blockage on either the engine nor carb side.
>
> Any hints as to what can be done to figure out where the problem is?
>
> Anne.