Diff breather filters?

Submitted: Tuesday, Feb 26, 2013 at 13:52
ThreadID: 100772 Views:5848 Replies:3 FollowUps:8
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Im about to extend the diff breathers on the troopy, and am wondering what to put on the end of the lines. Do I re-use the factory valves on extended tubes, or as I have read elsewhere, maybe a small in line fuel filter? Not real keen on the paper types, maybe an air-stone type filter or something similar to the old ARB compressor filter?

Any thoughts??

Cheers
Craig
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Reply By: Member - Fab72 (Paradise SA) - Tuesday, Feb 26, 2013 at 14:05

Tuesday, Feb 26, 2013 at 14:05
When I worked at a Toyota dealership, we would often use those small inline Ryco filters made from semi-transparent plastic. They're cheap and easy to replace.
There's no need to go over the top with expensive units when the cheap ones work just fine.
Fab.
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Follow Up By: Member - Fab72 (Paradise SA) - Tuesday, Feb 26, 2013 at 14:06

Tuesday, Feb 26, 2013 at 14:06
Fuel filters that is.
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Follow Up By: Rockape - Tuesday, Feb 26, 2013 at 14:37

Tuesday, Feb 26, 2013 at 14:37
Second the small ryco in line petrol filters.

RA.
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Reply By: Ross M - Tuesday, Feb 26, 2013 at 16:46

Tuesday, Feb 26, 2013 at 16:46
craigandej
Most breathers don't have filters at all and are usually just a cap flapping on the end of a fitting. During the life of the vehicle a very small amount of air ever goes out when hot or in when cold.
As long as they are up out of the way and above water ingestion level, dust isn't usually a problem.
You can use filters if you want to, as said manufacturers rarely do.
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Follow Up By: craigandej - Tuesday, Feb 26, 2013 at 17:12

Tuesday, Feb 26, 2013 at 17:12
Is it worth re fitting the factory valves rather than an open hose?

Thanks
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Follow Up By: Ross M - Tuesday, Feb 26, 2013 at 21:10

Tuesday, Feb 26, 2013 at 21:10
craigandej
For a sure thing I would run all breathers to a single point and T them altogether and fit one filter or breather to the end. Then you know all are either ok or not.
The final breather point, one hose only, can be inside the cab where dust and water probably won't be an issue.
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Follow Up By: edwin - Wednesday, Feb 27, 2013 at 13:57

Wednesday, Feb 27, 2013 at 13:57
hi guys, I dont recommend running your breathers into the cab, unless you like the sweet smell of hot diff/gear oil wafting thru the cab, Ive done this before thinking it was a good idea as we used to do lots of creek and water crossings in the wet season, I was running around the top end of the NT so it was stinking hot, might be different story in the colder climates,ended up running them up against the fire wall as high as possible and never had any problems
cheers
edwin
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Follow Up By: edwin - Wednesday, Feb 27, 2013 at 14:16

Wednesday, Feb 27, 2013 at 14:16
craig , I had a troopy as well, I sent the gearbox,transfer and front diff to the firewall and cable tied the rear diff breather to the rear fuel tank filler neck as high up as possible with a ryco type fuel filter on the end {never had a problem], originally had the rear one up thru a grommet into the body, but even that one was smelly inside.
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Follow Up By: Member - Andrew - Wednesday, Feb 27, 2013 at 20:44

Wednesday, Feb 27, 2013 at 20:44
The practice of fitting the Ryco type filters allows any fumes in the tube to condense inside the filter housing solving the problem of it collecting dust around the tube end potentially blocking it. It also prevents any wetted dust from sliding down the breather tube. Rare but can happen. Might be considered belts and braves but the cost is minimal.
Regards

A
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Follow Up By: Rockape - Wednesday, Feb 27, 2013 at 21:21

Wednesday, Feb 27, 2013 at 21:21
Craig,
if you go to the trouble of running extended diff breathers, don't refit the original breathers as they quite often block off. If the diff comes in contact with water when it is hot you will suck in water through the seals.

You want the diff to be able to breath and if you place some very cheap fuel filters on the end of the exposed hoses. 1. you can see if a wasp has blocked them off with a nest and 2 you can look straight through them and see if they have a problem with gunk. Also you can blow and suck through them to see if there is any blockage.

RA.
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Reply By: Member - Boobook - Thursday, Feb 28, 2013 at 05:54

Thursday, Feb 28, 2013 at 05:54
Piranha make some nice small filters specifically for this job for about $10 ea.

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