It sounds to me like you might have overfilled the crankcase in the course
of all this experimenting. The only force available to force oil out of the
vent tube is crankcase pressurization, and that shouldn't force out the oil
unless the oil level is above the bottom of the tube!
If the oil level reads correct, is it possible that you inadvertently wound
up with the wrong dipstick (thereby getting a false reading)? Or has the
collar on the dipstick slid down (with similar results)?
When the vent hose is connected, is there a PCV valve in the circuit? I ask
because it doesn't sound like your engine is in an entirely stock
configuration.
What happens when you remove the oil filler cap with the engine running?
Just guessing along with you here...
on 6/17/02 1:24 PM, frank krajewski at frankk@intap.net wrote:
> Here I go again! I have eliminated blowby as the source of my problem
> but would like to know if anyone here has ever experienced what I am
> going thru. There is oil literally flowing out of the vent pipe on my
> 1980 MGB. It recirculates back thru the carb and billows smoke from the
> excessive oil. I have removed the side covers for the 4th time to make
> certain the drain holes between the tappets/lifters were clear and they
> are. I poured a quart of oil down each one and it drained with no
> problem. It was cold oil as well which is much thicker than heated oil.
> The bottom and top ends are new. The compression reads 160psi across all
> 4 cylinders. A leakdown test did not reveal any leaks. The rings,
> bearings, etc., are all new. The block was professionally prepped and
> the pistons measured for fit. The head was totally rebuilt, new guides,
> valves, seats, springs, rocker shaft, etc. I would like to know if
> anyone else has had this dreadful experience. I am awaiting a
> replacement side cover but doubt that is the source of my problem. I
> disconnected the hose that recirculates to the carb and held it straight
> up in the air with the car running and the oil actually made it all the
> way up and out! I attached a catch can and drove 10 miles and "caught" a
> quart! The smoking sure cleared up tho when I disconnected that line to
> the carb.
> Frank "Swamp Yankee" Krajewski
>
--
Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the primer red one with chrome wires
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