[Healeys] excess oil consumption

[Oudesluys]

6 quarts over 4000mls does not sound to bad for an old design British 
engine. It also depends how the rebuild was done.
The main reasons for oil consumption, apart from leaking, are wear of 
bores/pistons/rings, valve guide wear and blocked/dirty crank case 
breathing system.
Check and clean the crankcase ventilation system first. Check for wear 
in the valve guides. Check the compression with a hot engine.
That the engine was professionally rebuild does not mean anything, it 
depends who has done the job. It is also peculiar that after a rebuild a 
few years ago, a ring job was needed not so long ago!!!!!?????

Kees Oudesluijs

It is very unlikely that the air filters have something to do with the 
oil consumption. There is no vacuum to speak of created there, unless 
they are totally blocked or are absolutely tiny.

^qwarthodson at aol.com schreef op 8-7-2015 om 1:55:
> A friend ask me to post the following question about excess oil 
> consumption on this forum to see if anyone has any suggestions.
> I know the engine has been professionally rebuilt a few years ago & 
> the compression & leak down tests recently looked "normal". No oil leaks.
> Thanks,
> Gary Hodson
> I had a brief conversation with my mechanic the other day and in the 
> next couple of weeks he will do a complete diagnosis on my Healey to 
> try to identify why I have had so much oil consumption.  FYI, I just 
> emptied the 6^th quart of oil into the engine yesterday – and that is 
> over 4,000 miles.  It is better than before the recent ring job, but 
> nonetheless, is not acceptable to me.
> Mechanic thinks the oil loss might be due to combustion of the oil 
> from the back air cleaner that is plumbed with the valve cover.  
> He thinks the air cleaner I have on it now is somehow creating a 
> vacuum pulling oil from the valve cover and injecting it back into the 
> piston and is actually burning the oil off very efficiently.  I still 
> don’t have any signs of leaks beneath the car nor any smoke from the 
> tailpipe.  Quite possibly the current Cooper air cleaners are too 
> small and are creating this vacuum.  The Cooper air cleaners replaced 
> some other chrome air cleaners the original owner had on the car – I 
> don’t know if it was original equipment.
> Will you do me a favor and see if anyone else had a similar issue with 
> oil consumption to identify a “solution” that worked for them?  Maybe 
> there are other thoughts that we should ask my mechanic to examine as 
> well.
>
>
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