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Crankcase ventilation
Posted: Sun Nov 21, 2010 9:48 pm
by PGH
I have a 1970 saloon. The crankcase ventilation seems to be via a cannister into the air intake (Filter housing). I have a non vented cap on the rocker cover. Is this set up correct for my car?
Thanks for any replies
Re: Crankcase ventilation
Posted: Sun Nov 21, 2010 11:08 pm
by bmcecosse
Possibly - but it would be better to go directly to the inlet manifold - possibly via a tube on the side of the carb ? If the carb has that tube ? Putting the fumes into the air filter - covers the paper element in oil and soon gums up the whole thing.
Re: Crankcase ventilation
Posted: Mon Nov 22, 2010 7:22 pm
by PGH
No tube on the side of my 1970 saloon. Presumably the original fitment on this car was via the cannister direct to the air filter. Is this correct?
Re: Crankcase ventilation
Posted: Mon Nov 22, 2010 8:47 pm
by bmcecosse
I would have expected to be via the special diaphragm valve on the inlet manifold - is there any evidence of such a thing on the car ? the pipe spraying oil over the air filter is to be avoided at all costs!
Re: Crankcase ventilation
Posted: Tue Nov 23, 2010 11:44 am
by PGH
Hi
This is a photo of my crankcase ventilation set up. There is no alternative place for pipe currently going into air cleaner. Is this the standard set up?[frame]
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Re: Crankcase ventilation
Posted: Tue Nov 23, 2010 12:16 pm
by stevey
The breather should go from the carb in the closed circuit breather. There should be a little tube coming out of the carb you can attach it to. This is how mine is set up.
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Re: Crankcase ventilation
Posted: Tue Nov 23, 2010 12:55 pm
by PGH
Hi
Thanks for the photo showing your set up. There is nothing like that on my carb to allow the pipe to be attached. How strange and confusing.
Re: Crankcase ventilation
Posted: Tue Nov 23, 2010 3:52 pm
by fussyoldfart
You probably don't have the original carburetor. My 1967, Maggie, has a ventilation system with a diaphragm controlled valve at the centre of the intake manifold but that may have been fitted only to export models.
Re: Crankcase ventilation
Posted: Tue Nov 23, 2010 4:07 pm
by Declan_Burns
I don't think all carbs had that-you can always tap the inlet manifold for a stub-but remove it first so that you don't run into swarf problems.
Regards
Declan
Re: Crankcase ventilation
Posted: Tue Nov 23, 2010 5:04 pm
by PGH
Looking at ESM Morris Minor Spares co, I see that you can buy two different carbs for the 1098 model. One has a breather pipe connection and the other one doesn't. Interesting to know when the change occurred.
Re: Crankcase ventilation
Posted: Tue Nov 23, 2010 8:10 pm
by bmcecosse
Long before 1970 I'm pretty sure! Looks like your car has an earlier carb and manifold fitted.