Morris Minor Owners Club

Could you help to identify the thin tube coming out of the manifold please on the top pic (to the left of the green clip). The larger bolt head in the background must be the servo take off. Could you also clarify what the two brass tubes and the black pipe are for in the lower pic. I imagine the latter is for connection to the timing cover chest for crankcase venting? The engine is an Ital 1300 (1275). Thanks, John[frame][/frame][frame][/frame]

The caburettor is an SU HIF 6 or 44.

Top picture:

The small take-off on the manifold to the left of the green clip should be blanked off - it is not the vacuum connection to the distributor! You could fit a vacuum gauge to it - wait for the howls of protest!!!!!

The large bolt is for the servo, and if not used must be blanked off completely.

The blanked off elbow to the right of the green clip should be unblanked and IS the vacuum connection for the distributor!

Lower picture:

Connection with the hose is, as you say, for the crankcase ventilation and is connected to the oil separator on the timing cover. Also make sure that you have a 'vented' oil filler cap in the rocker cover.

Lower, left brass port is the fuel inlet.

Upper, right brass port is a vent and should be left open.

You must have better eyesight than me Richard - I don't see any 'blanked off elbow beside green clip' - I agree the little tube standing up is not ideal for the dizzy vac connection - but if there is no other, then use it. I rely heavily on my vacuum gauges - when I'm driving a vacuum braked steam train!! Can't think of any other sensible use........ And - only use a vented rocker cap if you like breathing in carcinogenic oil fumes........... Otherwise - vent the block under the car where the fumes won't get in to the cabin......it DOES need to be vented - but not where you will breathe the fumes.

I understood the later A-series, like this one, used closed-circuit breathing, the idea being that NO oil fumes could escape, they being sucked back into the engine and burnt.

The breather pipe from the tappet chest is, of course, vented into open air and there is a risk (albeit small) of these fumes entering via the bulkhead.

This Ital engine was designed for closed-circuit breathing: surely it should be left as standard spec.??

Change it and you risk oil leaks - at your peril!!

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Looks like a standard distributor vacuum take-off plugged off with a small hex head screw?

On the crankcase ventilation we've been here before, and all 1275 in-line engines had a closed circuit breather system.

Looks to me like a random piece of something else - not part of the carb?

I also think its the vacume pipe, have a look at this link, shows same pipe from a different angle. http://www.mmoc.org.uk/viewtopic.php?f=4&t=42808