[Healeys] oil vent filter

Bob Haskell rchaskell at earthlink.net
Wed Jul 2 19:41:18 MDT 2014


Ira,

Make sure the lip of the valve cover is flat.  I usually glue the gasket 
to the valve cover and use some grease on the cylinder head side of the 
gasket.  That way I can remove the valve cover and not worry about the 
gasket sticking to the head.

Cheers,

Bob Haskell
AHCA 3000 Mk I registrar
http://www.ciahc.org/registry_3000mk1.php

On 07/02/2014 09:34 PM, I Erbs wrote:
> Have aftermarket rear seal. After having a Healey specialist I know look at
> it he seems to feel oil leaking from my valve cover is being blown around
> the engine bay. Ill replace the gasket this weekend and seal it with the
> Right Stuff sealant. Clean  it and sed if things improve. Thanks all fir
> your comments. Drove it to Summer School today. The kids and staff loved it.
>
> I Erbs
> IT Educator and Consultant
> sent from smartphone, so what you read, may not be what I meant to send.
> On Jul 2, 2014 6:26 PM, <healeyguy at aol.com> wrote:
>
>>   Ira
>> Austin engines have to have a way for excess crankcase pressure to leave
>> the engine.  On the 100 (four cylinder cars) there was a road draft tube
>> the vented the lifter gallery cover.  The car moving forward caused the air
>> blowing by the pipe opening (below the engine) to suck the air out of the
>> engine.  When the car was not moving it didnbt work so well. On the six
>> cylinder cars they connected the lifter cover and the valve cover to the
>> vent tube and then hooked into the air cleaner.  The vented crankcase gases
>> were pulled into the rear carb.  Having a filter on the end of the vent
>> tube and not connecting to the air filter will cause the crankcase pressure
>> to build up. Granted the condition of the rocker shaft  and bushing add to
>> the oil issue if they are worn but the need for a vent with negative
>> pressure (suction) is required. The original screw seal on the rear of the
>> crankshaft will not tolerate a lot of crankcase pressure and will leak like
>> a sieve. An aftermarket crank seal helps in that location but does nothing
>> for the real problem.  The other solution is the installation of a PCV
>> valve in the intake manifold with the appropriate plumbing.
>> Aloha
>> Perry
>>
>> Sent from Windows Mail
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