Tom,
This one's really easy. Your rocker arm bushings and shaft are badly worn
causing excessive amounts of oil up in the rocker cover that can't drain
down quickly enough, so the breather hose is pulling this excess oil into
the rear air cleaner.
Autofarm http://www.autofarm.net/autofarm/home.aspx has an excellent
rebuilt exchange scheme for the entire assembly. Simply unbolt your old worn
one and send it in to Autofarm. They usually have a fresh exchange assembly
on the shelf that they'll send you. Install, adjust valve clearance,
reinstall the rocker cover and you're away.
Rich Chrysler
--------------------------------------------------
From: "Tom McCay - Classic-Car-World Ltd"
<enquiries@classic-car-world.co.uk>
Sent: Tuesday, August 24, 2010 6:10 PM
To: <healeys@autox.team.net>
Subject: [Healeys] Venting oil through rear air filter
> Hi guys, I have an interesting issue where I seem to be venting excess oil
> out
> of the rear carb air filter on my BJ8. The engine runs great and the oil
> pressure is good but I seem to have excess oil dripping out of the air
> filter
> and down onto the exhaust system. The oil levels are also correct, but I
> do
> seem to use or loose about half a pint on a 200 mile trip.
>
> I thought that perhaps that the air filter needed cleaning and that the
> engine
> was breathing more out of the crank case than it should and sucking the
> oil
> out. I've cleaned the filters but the problem remains. I think the next
> option
> is to do a compression check to see if I have a ring problem where the
> crank
> case is being pressurised or perhaps valve stem seals?
>
> My gut feeling is that I'm going to have to pull the engine out eventually
> but
> are there any other thoughts before I have to go this far?
>
> Kindest Regards
>
> Tom
>
> 1965 AH3000 MkIII BJ8
> 1960 MGA1600
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