Breather

Post by **eastona** » Sat Jan 14, 2006 11:53 pm

I've got a breather coming out of the rocker cover, this vents through a hose that is vented to atmos somewhere down by the road (it's cable tied in place). There is also a hole in the air filter with a short length of hose juby clipped on. (going nowhere BTW)

I've got the solid type of oil filler cap.

Should i connect the hole in the air filter to the hole in the rocker cover?

Do I need a seperator mushroomy type thing?

Andrew
6 weeks and 800 miles into minor ownership, fantastic.

Post by **Blunt** » Sun Jan 15, 2006 12:51 am

welcome to the forum eastona...
and glad you're enjoying your Moggy

I'm afraid I can't answer your question, but someone far more knowledgable will be along before you can say Sir Alec Issigonis

I don't worry about being a Noob...after all, even seasoned members occasionally refer to things as "a rear bumper springy thing"

Post by **Shawn** » Sun Jan 15, 2006 4:34 am

My Mog (back when it was standard) had a rocker cover to air cleaner hose, just as you describe. I think they should be connected.

(This is a pic from the day I got the car. It's not that grotty now!)

Post by **simmitc** » Sun Jan 15, 2006 9:14 am

There can be a lot of discussions about breathers (some of it informed

). To get you the correct answer, please advise the year of the car / size of the engine, as the breather systems changed over the years. The good news is that just about any arrangement will work on almost any engine

Post by **brixtonmorris** » Sun Jan 15, 2006 10:16 am

i find when i connect my rocker breather to air filter it ruins the air filter. so i dont connect them.

Post by **ColinP** » Sun Jan 15, 2006 10:53 am

Andrew,

(oh heavens - another Andrew!

)

simmitc has a very good point - there have been many varieties of breather vents, so as much detail as possible please.

I would suspect (guessing), that the two should be connected, but that does depend on lots of things... (there is an old thread on this - have a search 'cos it has lots of pictures).

BM - check the size of the hole in the air filter housing - it's probably too large which allows lots of oil (not just the fumes) into the filter housing...

Colin

Post by **brixtonmorris** » Sun Jan 15, 2006 11:01 am

yea thats right. the holes on the air filter base are different sizes. smaller hole is better for the problem.

Post by **eastona** » Sun Jan 15, 2006 1:06 pm

it's a 1098 gold seal engine No 8G162 ER87790
it also has AD stamped on the engine No plate.

the car is a 1969 4 door.

Andrew

Post by **bmcecosse** » Sun Jan 15, 2006 1:14 pm

If the engine is fumey - then the filter can get clogged up easily with the oil mist. Later cars have a carb with a suction pipe on the side - and this really is the best answer - put the hose on there. Since I am using an early (but bigger) carb without this suction pipe - I made a new hole in the air cleaner which comes up inside the filter - and so the fumes are drawn directly into the engine without blocking up the filter. It works!

Post by **brixtonmorris** » Sun Jan 15, 2006 3:37 pm

yea! thats a good idea.

Post by **Packedup** » Sun Jan 15, 2006 4:11 pm

*Sigh*

It's not needed. It's connected to reduce the overall emissions level from the car. There is no harm in running it vented to air. The later ones where the breather goes direct into the carb are if anything worse for reasons I'm not sure I can be bothered to go into yet again (it's been discussed a lot). Suffice to say oil and combustion vapours are not the ideal mix to have going back into the engine...

Just make sure any hoses that vent the engine to air are pointed down and hang low enough to pick up the airflow under the car. This will reduce/ prevent the fumes filling the cabin.

Post by **eastona** » Sun Jan 15, 2006 5:26 pm

I did have a similar system on an old land rover, and when it was connected to the air filter, it seemed to use less oil, presumably lowering the pressure in the crank case forced less oil out.

BTW, anyone know what the AD means on the engine number, does it indicate anything about the status of the gold seal engine when fitted?

Thanks for loads of help.

Andrew

Post by **bmcecosse** » Sun Jan 15, 2006 5:49 pm

The breater connected to the engine is a GOOD idea - it drops the pressure in the engine and so less oil leaks, AND you don't have to breathe the fumes which are definitely not good for you. Yes, it's not a great idea to have oil going through the engine - it drops the effective CR you can run without risk of detonation - but unless the engine is hyper tuned with a very high CR it won't mind at all.

Post by **aupickup** » Sun Jan 15, 2006 6:47 pm

so after all that can anyone tell me the correct breathing system for a ital 1275 a+ engine thanks

Post by **eastona** » Sun Jan 15, 2006 7:41 pm

I'm going to be brave and reconnect it, without a mushroom thing (as i haven't got one) and see what difference it makes (to power (by the "seat of the pants" method), economy and oil consumotion)
Andrew

Post by **bmcecosse** » Mon Jan 16, 2006 7:48 pm

It will only make a difference to the smelly engine - which won't be smelly any more, and less chance of oil leaks. No difference to power or economy.

Post by **eastona** » Mon Jan 16, 2006 10:05 pm

"less chance of oil leaks" is good enough in my book! never was too concerned with power. (that'll come with the 1275

Andrew