Diff breathers

[Eric]

I got the impression that there was some kind of label on the prop shaft that has finally worn off with use on wet roads and the like

Looking at the photo again, and after @Logsplitter comment and my dust mark I'm convinced it is the cable hanging down right above it.

 

[ECrider]

Has that cable above it been rubbing intermittently when on rough roads onto the prop shaft
That’s what caused my transfer box cables to wear through. Some of the fixings for electric cables, transfer box cables , front rads etc. are seriously dubious in my opinion. I will elaborate via Logsplitter travels thread over the next few days when internet is better.

Tks and also @Eric - the cable is in the right spot but it's filthy and no visible rub marks. Have cable tied it out of the way. It's also possible that some debris attached itself around the cable and rubbed on the shaft?? Will get back under it tomorrow.

 

[ECrider]

Ok a bit more cable tying just to be on the safeside.

1) The one above the forward propshaft
2) A few loose ones near the transfer lever cables.
3) Quite an exposed one near the transfer box, very low electrical socket so the cable doesn't have much choice.

 

[ECrider]

tks Doc, just ordered some myself here in the UK.

I'll try and route them up the RAI if poss

thanks @DocAUS, received mine

 

[stickshifter]

Was having a good butchers under the Gren...

 

[Tom109]

My PTC parts arrived for the diff breathers. The 2-to-1 outlet will connect both lines from the diffs and be secured high in the engine bay (against the firewall/bulkhead most likely). The breather fitting will attach to the threaded portion to keep spiders and dust out.

At the rear diff I plan to use the 90def. fitting to avoid the exhaust, and possibly the straight fitting in front. But I bought 2x straight and 2x 90deg. just in case. Hope to install this weekend.

 

[DaBull]

My PTC parts arrived for the diff breathers. The 2-to-1 outlet will connect both lines from the diffs and be secured high in the engine bay (against the firewall/bulkhead most likely). The breather fitting will attach to the threaded portion to keep spiders and dust out.

At the rear diff I plan to use the 90def. fitting to avoid the exhaust, and possibly the straight fitting in front. But I bought 2x straight and 2x 90deg. just in case. Hope to install this weekend.

View attachment 7844085

Hi Tom109, Like the way your going with this, please post install photos and instructions if you can along with where to purchase everything.
I know it often takes more time to document than to do the install, so thanks in advance if you can find the time to do so.
DaBull

 

[K1LL3M]

My PTC parts arrived for the diff breathers. The 2-to-1 outlet will connect both lines from the diffs and be secured high in the engine bay (against the firewall/bulkhead most likely). The breather fitting will attach to the threaded portion to keep spiders and dust out.

At the rear diff I plan to use the 90def. fitting to avoid the exhaust, and possibly the straight fitting in front. But I bought 2x straight and 2x 90deg. just in case. Hope to install this weekend.

View attachment 7844085

I think you will struggle screwing in the 90 to the the diff

 

[Tom109]

I think you will struggle screwing in the 90 to the the diff

The 90 swivels, so you only tighten the nut. The only downside to the 90 is routing the rear airline on the RH side of the vehicle (I envisioned them both on the LH side).

 

[Land Raver]

I ran a simple calculation using Boyle's Law. The pressure difference using a 40 degree Fahrenheit (Sorry rest of the world) should be less than 1 psi. That's not much of a vacuum.

 

[K1LL3M]

The 90 swivels, so you only tighten the nut. The only downside to the 90 is routing the rear airline on the RH side of the vehicle (I envisioned them both on the LH side).

Ah, nice. I know when I installed my breathers there is not a lot of room to to screw a 90 fitting. The swivel makes sense.

Regarding running it, routing down the passenger (LHS) side, for us RHD vehicles was pretty easy. Follow the locker wire back if you have them. Back basically trailing arm to chassis , with other lines on chassis and up into engine bay.

I'd post some pictures of mine but it is still at dealers waiting for the body control module to be replaced and programmed, fingers crossed by this afternoon. Its going on 2 weeks now.

 

[ORSO]

today I've mounted the diff breathers:

 

[bnebenda]

today I've mounted the diff breathers:

The thread in the diff housing is 10x1 parallel or 10x1 conic? Which size did you choose for the thread after the adapter? Any info on middle gear box or auto gear boc regarding breathers?

 

[ORSO]

The thread in the diff housing is 10x1 parallel or 10x1 conic? Which size did you choose for the thread after the adapter? Any info on middle gear box or auto gear boc regarding breathers?

it's a normal 10x1 thread in Italy. I presume parallel.

the adapter is a 10x1 metric to 1/4 gas.

I still don’t understand if gearbox and transfer case has breathers. even if there were, they would be much higher than the differentials.

 

[bnebenda]

it's a normal 10x1 thread in Italy. I presume parallel.

From the pictures it looks like you were using patchlock / loctiite? Did the original vents have any kind of (metal) seal or did you observe traces of patchlock? Did they come off easily?

 

[ORSO]

the original vents were attached without threadlocker and with very low torque.

I mounted the new fittings with engine sealant but they were already equipped with o-rings. No metal seal.

 

[bnebenda]

the original vents were attached without threadlocker and with very low torque.

I mounted the new fittings with engine sealant but they were already equipped with o-rings. No metal seal.

From all I know about port sealing, if there is no taper on the male side then there must be a seal (either polymer or metal). On the pictures I found so far, the original breathers have no seal, hence I would assume they were tapered, howvever the bore could still be parallel. If you could insert your (parallel) adapter all the way, I would suspect the port is parallel in which case you can install a tapered breather without seal or a parallel breather but then yu need a seal (probably for a differntial I would use a metal seal).

 

[ORSO]

let's remember, however, that this system does not have compressed air inside, so in my opinion a little sealant is more than enough.

 

[bnebenda]

let's remember, however, that this system does not have compressed air inside, so in my opinion a little sealant is more than enough.

I removed the (rear axle) breather and took a picture of the clean thread. I think from the picture one can conclude it is a M10x1c (conical).

Bernd

 

[ORSO]

good to know, I hadn't noticed

However, traditional threading does not have insertion problems