Marina 1.3 Breathers

[convertibled]

I am fitting a newly rebuilt 1.3 Marina engine to my Convertible. I have a fitted a Hif 38 carb and found all the connection info on this site but there seems to be lots of conflicting info on breathers. I know I must connect the Rocker box cover vent to the carb but what else?
Should I take a vent from the cover plate which blocks the old mechanical fuel pump?
Should I have a separate vent with an oil collection bottle?
Should I just wait and see how it runs?
So many questions!
Thanks

[bmcecosse]

I assume it has a vent can on the timing case cover? Join that to the rocker cover vent with a T - and then to the carb inlet pipe on the side.

[convertibled]

No, there is no vent can on the timing chain cover. It is the 1.3 Marina engine with the screw on oil filter near the distributer

[philthehill]

Whilst it may not have a breather on the timing cover it should have!
Even the timing chain cover for the Marina engine 10V (1100cc) Pt No: 12G2507 has the breather/oil separator on the front face.
The timing chain cover for the Marina engine 12V (1300cc) Pt No: 12G2623 also has the breather/oil separator on the front face.
I suspect that someone has used the standard Minor timing chain cover Pt No: 12A1419 (with lip seal) when doing the Marina to Minor conversion. It may also at the same time had a duplex kit fitted.
A picture of the timing chain fitted to your engine would be appreciated.

[convertibled]

[frame][/frame]

[Sparticus]

I think i'm right in saying that you'd need to cut down the breather canister anyway, if your timing cover had one, as to clear the fan?

[les]

That's not a Morris minor! It hasn't got provision for a starting handle!

[philthehill]

As suspected - a Morris Minor type timing cover most likely fitted when the front engine plate was fitted so enabling the Marina engine to be fitted utilising the Minor engine mountings; and with the Marina damper and crankshaft bolt also retained.
Note: there are two types of damper crankshaft bolt. The bolt Pt No: TAM2019 is fitted and used for the later 'A' Plus damper and has a countersink in its end to identify it. The bolt for the earlier non 'A' Plus damper is Pt No: AEA312 and has a plain head.
Examining both bolts there is a distinct difference in the underside of the head of the bolt where it makes contact with the damper/crank.
As regards a crankcase vent you can tap into the aperture where the mechanical fuel pump was fitted but it must have a oil separator gauze fitted between the crankcase and carb/pollution valve.
I have previously suggested utilising one of these bolt on breathers/oil seperator fastened to the fuel pump aperture via an adapter plate.

http://www.ebay.co.uk/itm/Classic-Mini- ... 2a4cf819f0

[bmcecosse]

You could fit that type of breather - although I suggest a timing cover breather will be a GOOD IDEA.... The 1275 needs all the breathing it can get -or you will end up with an oil soaked clutch.

[convertibled]

Thanks everybody. I will look at all the options. I am going to be using the car to Spain so am fitting an electric cooling fan so there should be room for some type of breather on the timing chain cover.

[bmcecosse]

For long runs like that I would definitely have the timing case breather - and the fuel pump breather, and retain the rocker breather too.