Look, "sealing" the filler cap is not the issue. If it's actively blowing
oil out the filler cap (or the dipstick tube, or anywhere), you have a
crankcase pressurization problem, not an "oil leak". So you need to solve
that, not go around plugging "leaks". In fact, each leak you plug will just
make the problem worse.
I'm sure your UK-spec 78 is considerably different from the emasculated US
version, so I can't make any specific suggestions, but I suggest you compare
the crankcase ventilation system as described in the manual with whatever
the PO has bodged up on your car, and set it to rights. At least this would
be my first step.
Good luck. :-)
on 10/24/01 7:26 AM, scott beavis at sbeavis@solartronanalytical.com wrote:
>
>> Keep us informed of your progress.
>
> Will do. I really do think it is 99% likely that this smoke is being caused
> by oil somehow getting onto the hot exhaust, either up on the manifold, or
> down under the car. If I can fix the oil leaks, then theoretically the smoke
> should go away.
>
> The trouble with oil leaks is you can't usually see them easily. The
> underside of the engine is just very oily, with oil drips hanging off all
> the bolts etc. The car leaks a bit of oil when parked but nothing to really
> worry about. I am pretty sure most of the oil is coming from the rocker
> cover. There are black trails down the head, past the sprak plugs, and then
> down the block. If I vent the rocker cover by plumbing a hose onto it then
> hopefully this should stop the oil coming out. I want to get an alloy rocker
> cover. The caps on those tend to seal better.
>
> I am also considering doing the piston rings. I really don't want to pull
> the engine out, so maybe take the head and sump off and push the pistons and
> rods out the top. New pistons and rings could be fitted and then carefully
> inserted back in.
>
>
> Scott
>
--
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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