[Mgs] No oil pressure new B engine

[Richard Ewald]

Don nailed it.
they put a 3 main gasket on a 5 main engine.  Idiots.
On the 5 main engine, the path from the pickup goes up to the gasket
face and over the top into the pump.  (I'm guessing this is so the pump
won't lose its prime sitting for a long time).
the 5 main gasket covers this opening at the top of the pump, the 3 main
gasket does not.  Using a 3 main gasket on this style pump results in a
giant air leak on the inlet side of the pump.  that is why I could feel air
pressure, but never got any oil.  There was enough oil in the pump that it
acted as a weak air pump, but would not pull oil into the pump due to the
air leak.
Hint to anyone building a B motor, match the gasket to the pump, NOT the
engine.
It's nice to know that my memory is not totally FUBAR and there are two
gaskets.
Thanks for the help everyone.
Rick
On Sun, Jan 23, 2011 at 12:00 PM, Don <don at napanet.net> wrote:

> I had this happen to me on my '67 B GT many years ago.  After rebuilding
> the engine, I could not get oil pressure.  I even borrowed a oil pressure
> priming tool from Craft Machine Shop in Santa Rosa, the place that had done
> all the machine work on my engine.  After a lot of cranking and swearing, I
> pulled the engine, and starting taking things apart.  What I had done was
> used the wrong oil pump gasket; the gasket kit contains two different ones.
>  Either one will fit, but only one has holes in the right places to allow
> oil to flow.
>
> Don Scott
> Calistoga CA USA
> 1966 TR4A
> 1962 MGA Mk 2
> 1973 MGB GT (selling)
> 1963-7 MGB (seeking)
> Misc. Japanese cars
>
>
>
>
>
>  At 11:10 AM 1/23/2011, Richard Ewald wrote:
>
>> My buddy had a new engine built for his B.  Engine does not produce any
>> oil
>> pressure.(I told him I would build it, but did he listen?)
>> I have pulled the line to the oil pressure gauge and pumped oil backwards
>> into the engine per the suggestion on Barney's website.  We have even
>> turned
>> the engine backward, and still no oil pressure.  I tried pumping oil into
>> the oil pressure gage line and then using shop air to force the oil down
>> into the pump.  When I did this I could hear the air bubbling in the oil
>> pan
>> so I am fairly sure the pump is NOT dry at this point.
>> Taking the hose off the inlet to the oil cooleer I can feel some pressure
>> buld up, but I am getting no oil out.  We have carnked the engine with the
>> plugs out till the batteries are dead.
>> So I have two questions before I pull the pan.
>> I seem to recall that either the gasket kit either came with two gaskets
>> or
>> it is possible to get the gasket on backwards/upside down.  Is my memory
>> correct, or am I getting old?
>> Any other suggestions you have before I pull the pan?
>> Thanks
>> Rick
>>
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