Breather Oil Trap

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philthehill
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Re: Breather Oil Trap

Postby philthehill » Wed Jan 27, 2021 10:13 pm

Look at Rolomorris's post above and that is very nearly off the shelf using the part listed in my link above.
So long as it is regularly cleaned then there will be no need to do the split open conversion.
It is just bolted on and can be unbolted very easily.
Here is the canister on my Minor. It is a new canister and has been fitted at an angle to clear the performance manifold and radiator pipes.
It is so simple to fit and very cheap to purchase. If you can use a spanner and hacksaw the world is your oyster.
Breather 1.JPG
Breather 1.JPG (1.6 MiB) Viewed 602 times


pgp001
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Re: Breather Oil Trap

Postby pgp001 » Wed Jan 27, 2021 10:47 pm

Phil

Do those have any material inside to stop the oil passing through ?

Phil P

philthehill
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Re: Breather Oil Trap

Postby philthehill » Thu Jan 28, 2021 7:53 am

The canister is filled with gauze.


geoberni
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Re: Breather Oil Trap

Postby geoberni » Thu Jan 28, 2021 9:43 am

I've been following this Topic with idle interest... since my 1098 doesn't have one of these Oil traps.

So what advantage does this give to the 10ME engine?
If it's such a problem to maintain, what would be the effect of removing it and having the simple pipe, like my 10MA arrangement?
Just asking out of complete ignorance of engine differences. :)
Basil the 1955 series II

Image

philthehill
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Re: Breather Oil Trap

Postby philthehill » Thu Jan 28, 2021 9:58 am

The only reason the oil separator trap is there is to comply with the then new emission controls.
Just having a straight through pipe to atmosphere means that fouling emissions go straight to the atmosphere.
The cannister is either connected to the PCV valve or the carb. Therefore any fouling emissions go back into the engine and are consumed by combustion and not allowed to escape to atmosphere.
The canister is there with the oil separator gauze inside it to ensure that only the foul emissions go to the PCV valve or carb and not oil which will upset the carb/fuel mixture and negate the ability/reason for foul emission consumption.


pgp001
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Re: Breather Oil Trap

Postby pgp001 » Thu Jan 28, 2021 10:07 am

What Phil said, with the added advantage of getting a higher crankcase depression and thus less oil escaping from the rear scroll seal.

Phil P

geoberni
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Re: Breather Oil Trap

Postby geoberni » Thu Jan 28, 2021 10:11 am

Thanks Phil (both of you :) )
That explains why I can remember cars I had in late 70s and 80s always had a breather connection from the rocker cover to the inlet manifold. They were all Fords and Vauxhalls.
Basil the 1955 series II

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pgp001
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Re: Breather Oil Trap

Postby pgp001 » Fri Jan 29, 2021 8:51 pm

Job done

I made the bobbin a bit longer than normal so I could get the O ring below the rust hole that had gone through the side.

Image

The visible band of the aluminium bobbin is a bit thinner than normal and the screws are round the side, so after a lick of paint it will be barely noticeable.

Image

Considering how bad this one was, it turned out OK in the end.
Phil P

timberman2004
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Re: Breather Oil Trap

Postby timberman2004 » Sat Jan 30, 2021 7:26 am

very tidy, and many thanks Phil. Solid Club member

now i can check improvements in scroll 'seal' oil leakage

as a query, is there still a level of crankcase pressure present, even if one had perfect bores and rings?

philthehill
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Re: Breather Oil Trap

Postby philthehill » Sat Jan 30, 2021 9:36 am

There will always be an amount of crankcase pressure generated due to the movement of the crankshaft, conrods, pistons etc.
If the rear scroll is in good condition it can cope and not be overcome by this generated crankcase pressure.


pgp001
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Re: Breather Oil Trap

Postby pgp001 » Fri Feb 26, 2021 5:38 pm

Just in case there are still any doubters, here is the latest breather canister one of our members sent me for the modification.
It looked fine from the outside and there was no clue as to how bad it had got.

Air was still passing through it, but crucially it was not being filtered in any way, so all the oil vapour was going straight through it and back into the engine intake and burnt in the cylinders rather than being separated and running back into the sump.

Image

Image

Image

Image

Image

Phil P

les
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Re: Breather Oil Trap

Postby les » Fri Feb 26, 2021 9:28 pm

That member was me ! I couldn’t believe it when I saw the picture, thanks so much for cleaning all that rubbish out.
A well worth modification. I told the guy that sold me the canister, that I was getting this mod done, to which he replied ‘we just flush them through with petrol or similar’ I feel like showing him that picture!!


pgp001
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Re: Breather Oil Trap

Postby pgp001 » Mon Oct 04, 2021 10:58 pm

Well I have just opened up a couple more for one of our members, this is what I found..........Totally blocked up with oily gunge on these two. It seems that the filter is either protected with all the oil that gets drawn in and then blocks up, or the filter rusts away completely.

This is the first one.
Image

And the second one.
Image

Anyone that has one of these fitted to their engine would do well to have it modified so it can be cleaned out and maintained.
I have modified around ten of these for our members so far, and not one of them was in good condition inside.
Have a look back through this thread to see how they can be modified. I can do this modification for anyone who needs it at a very reasonable cost, just send me a PM.

Phil

jagnut66
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Re: Breather Oil Trap

Postby jagnut66 » Tue Oct 05, 2021 3:53 pm

And the second one.
Ugh! :o
Was that my one?
Best wishes,
Mike.
1954 Series 2: 4 door: "Sally" -- on axle stands needing more welding......
1955 Series 2: Traveller: "Elsie May" -- on the road and enjoying her 'as is' for now but I see work ahead......
1970 Triumph Herald 1200: "Hetty" -- driven back from Llangollen in Wales

pgp001
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Re: Breather Oil Trap

Postby pgp001 » Tue Oct 05, 2021 4:28 pm

Yes

Both of those are yours.

Phil

jagnut66
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Re: Breather Oil Trap

Postby jagnut66 » Wed Oct 13, 2021 3:31 pm

Just to say I now have both of these back and Phil's done a great job.
Best wishes,
Mike.
1954 Series 2: 4 door: "Sally" -- on axle stands needing more welding......
1955 Series 2: Traveller: "Elsie May" -- on the road and enjoying her 'as is' for now but I see work ahead......
1970 Triumph Herald 1200: "Hetty" -- driven back from Llangollen in Wales


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