hi, i appear to have 2 engine breather's on my 1275. One is going from the rocker cover to the air filter and one is going from the flywheel housing to the carby body. Are they both neccessary? Or can i block one or both off?

Here's my engine bay



Ryan

Haven't seen a block like that before: let me guess: South african?

I'd leave both breathers there.

It is sucking air from the filter, into a restrictor in the rocker cover, then through the crankcase and up the flywheel housing breather into the carb.
This is a pretty normal setup for this PCV system.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

yes from what i've been told it's south african. I hope its ok to change rocker covers as i want a chrome one

Interesting question. I too am gettting a new rocker cover without a breather pipe hole. My current breather isnt piped back into the carby, it just has a filter on the end. Will this new rocker cover with only a breather oil cap be fine?

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I hope you're going to chuck away all of that horrible braiding sh!t

& if you notice the (common) problem of the water outlet at the back of the cyl head is feeding "HOT" water to the bottom tank of the rad where it will just be drawn back into the engine without being cooled

i`d fix that first

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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.

how would you suggest i fix it?

The block seems the same as a Marina (spin-on filter). Some Marina commercial vehicle blocks had extra ribbing and were thought to be stronger. Anyone heard of that?

Al

Method I use is a cut-down lower hose on the top - then you run the hose the end of the block to it - hot water where it's supposed to be, at the top of the rad.

Dunno what Matty would do, though ;P

cheers

Jacob

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'72 Clubman Van - 1022cc, 295 head, 731 cam - Daily Driver
'69 Morris 1100 S - Dinged by a bus, in shed under repair
'64 Morris 1100 - Early 1100, long term project