 | Home > Puma (Tdci) > Oil leak back axle |
 
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| Defender08 Member Since: 16 Nov 2013 Location: Adelaide Posts: 20   
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I have had persistent oil leak past the rubber cover (dust cap) over the end of the passenger side rear axle drive shaft.
It developed after a 3 day trip over very rocky ground in desert to the north, The differential ventilation pipe (breather) has been checked to ensure no blockage (pipe removed, air blasted and rodded with flexible steel cable; the breather insert into the axle housing was also checked to make sure that nothing was blocking air pathway between axle and breather. A local very experienced independent land rover expert has replaced the passenger side wheel bearings and inner and outer hub seals. The leak has persisted and increased. The increase coincided with the loss of the dust cover. I'm presume that it has been blown off and worked its way from inside the cavity of the boost alloy rim to the highway. I'd welcome suggestions about the likely cause of this leak. |
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6th Jan 2018 2:24am |
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| pannawonica Member Since: 21 Nov 2010 Location: Clackline Western Australia Posts: 568
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Sounds like the inner seal behind the stub axle that retains the axle oil.
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6th Jan 2018 3:59am |
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| Alien Member Since: 18 Jan 2015 Location: Bacchus Marsh Posts: 230
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x2 for the outer axle seal, I had one go on ours contaminating the wheel bearing grease with oil.
The stub axle will need to be removed to access the seal. Cheers, Kyle. |
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6th Jan 2018 10:03am |
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| Vitesse Member Since: 21 Mar 2014 Location: Sussex Posts: 381  
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I hope all goes well for your repair. I Just had exactly the same issue occur today on my 2015 Puma. 42000 miles. Luckily sorting out via Landrover assist under warranty etc. Going to be collected by the dealer on Monday. I had wondered also about the breather but haven’t been able to check it. Let’s se what the dealer makes of it
 2015 90 XS Santorini Black |
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6th Jan 2018 4:31pm |
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| dorsetsmith Member Since: 30 Oct 2011 Location: South West Posts: 4554 |
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6th Jan 2018 5:03pm |
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| Defender08 Member Since: 16 Nov 2013 Location: Adelaide Posts: 20
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Thank you all for your replies.
I probably didn't make myself clear in the original message. The seal stub axle inner (FTC3650) was replaced at the same time as the outer seal and bearings. After replacement of the inner seal, the oil leak stopped for a few hundred km, but within 1500 km oil was leaking at the same rate as before seal replacement. At about 2000 km since the repair, the leak rate must have allowed pressure to build up within the dust cap because it has blown off and been lost on the highway. Look forward to any other suggestions. |
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6th Jan 2018 9:43pm |
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| Alien Member Since: 18 Jan 2015 Location: Bacchus Marsh Posts: 230
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My next check would be to see if the diff breather is clear.
If it's blocked it may me pushing oil past the seal. It's also possible the replacement outer axle seal is damaged Cheers, Kyle. |
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6th Jan 2018 9:55pm |
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| agentmulder Member Since: 16 Apr 2016 Location: Outer Space Posts: 1324 
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Although you'd have to be pretty rough, it's possible to dislodge the seal when inserting the half shaft. How is the half shaft around the area where the seal sits?
Also possible for it to be installed the wrong way round twice, the second following the lead of the first .. But yeah, for the outer cap to pop off if think you're looking at a clogged breather. They're easy to find once you're under, take off the fill plug and blow through the breather (lungs or compressor), see what happens... Solved the bowel problem, working on the consonants... |
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6th Jan 2018 10:17pm |
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| UtilityTruck Member Since: 09 Jan 2014 Location: Oxford Posts: 463
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The only reason for oil to be coming out of the drive member area is if the inner oil seal has failed. As to why it’s failed, as others have said it could be a breather problem or fitted incorrectly (good enough for 1500km?)
Potentially it’s possible the sealing face was damaged so the new seal isn’t working correctly? I had the same problem at about the same mileage on my 2014, LR rebuilt it along with new rear driveshafts. Fortunately they fitted the later type one piece shafts, which on a 2015 you should already have. 2014 Keswick Utility 2.2 |
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7th Jan 2018 9:20pm |
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| agentmulder Member Since: 16 Apr 2016 Location: Outer Space Posts: 1324
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Just thinking now about the blocked breather...
Firstly, on level ground if you pull a half shaft out the axle oil doesn't leak out, and with warm axle oil and the accumulating pressure you'd expect air to leak out more readily than oil (right?). i.e. not leading to oil in the hub. Next, the seal aint going anywhere in the 'out' direction - but then the vehicle cools down maybe suction is at play? But is it really that strong enough to pull the seal out of its seat in the stub axle? If it were me, I'd get myself a flange gasket, remove flange and half shaft, and have a look with a flashlight. Maybe a dentist's mirror on a stick 
In my case I had a partially blocked breather. I remember now, you don't actually need to remove the fill plug, with a bit of grunt you can remove it from the top of the axle itself. Blew some compressed air through it and a bunch of dust came out. I'm pretty sure the rear outlet doesn't achieve anywhere near the heights of the front one, and is therefore more susceptible to blockage. Solved the bowel problem, working on the consonants... |
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7th Jan 2018 9:46pm |
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| pannawonica Member Since: 21 Nov 2010 Location: Clackline Western Australia Posts: 568
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I diagnosed a blocked breather the first home service after warranty! Took the car for a run too get the oils hot , put it straight on the hoist and removed the rear axle bung! My defender kind of took a huge wet fart covering me with diff oil. Land Rover had bolted the diff breather down between body and chassis!
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8th Jan 2018 3:02am |
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| agentmulder Member Since: 16 Apr 2016 Location: Outer Space Posts: 1324
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Gotta wonder how old the kids are putting them together right? The discussions in middle management: "Well, let's put little Jimmy and Sally on paint, they're showing real talent in the sandpit. Tommy is on electrics, what a champ! He ate allllll his greens" Solved the bowel problem, working on the consonants... |
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8th Jan 2018 3:17am |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17364 
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The rear axle breather usually terminates somewhere between the chassis rail and the underneath of the rear tub adjacent to the rear nearside wheel. it is such a daft place that it almost negates the value of having the extended breather in the first place. It is the same level of automotive incompetence that put the original fuel tank breather terminating directly behind the rear nearside wheel. Shocking. |
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8th Jan 2018 8:44am |
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| pannawonica Member Since: 21 Nov 2010 Location: Clackline Western Australia Posts: 568
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My rear diff breather tube ran all the way too the engine bay and up at the heater.
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8th Jan 2018 12:24pm |
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