Broken pipe...top of gearbox

Hey guys,

Removed my seatbox and fuel tank to do some repairs and found this...

seemed to drive fine? What’s it for and best way to repair?

many thanks

pretty sure that now is the time to give that a dam good wash I cant quite make it out

I am pretty sure thats just a vent pipe, so wont affect the running. trace it think it goes up the bulkhead. If you dont go wading just tape it up for now.
But if you do do deep water then best replace.
I would also check the condition of the oil in the gearbox & TB, or just change it now as you have great access

J

Thanks for the reply.

I plan to have a good clean up under there

Can anyone confirm that it’s a breather?

Yes, just a breather pipe, think they are short anyway, they were on mine when I rebuilt it. Pipe is 6mm nylon.
I replaced the fitting and fitted a longer pipe up to the bulkhead. I used a pneumatic fitting for the box, can't remember if it's 1/8th or 1/4 BSP, you can extend what's there if theres a good short bit left with a 6mm to 6mm straight push fit joiner and some more 6mm nylon pipe. The pipe came in, I think, 10mtr rolls so I extended the axle breathers too. Cheap enough from memory.

As @Flossie , this is your breather pipe and best to replace with 6mm black nylon tubing/compressor line, it's all readily available on eBay. Of note, if your gearbox is in such horrendous condition it would be worth replacing all your breather lines for new...if only to ensure your diffs are actually breathing and not over pressurising.

ps when were all the transmission fluids last replaced??

Well, that’s one way of stopping the leaks!

Tharell come up a treat with a pressure wash

Yeah I plan to redo all breathers and have a big clean up

Will it be safe to use a high pressure washer to clean it all off or am I at risk of damaging anything in this area

The interior will get soaked but most of its removed at the momment

Should be alright to wash. After all, it gets wet when you drive on a wert road, let alone when wading. A bit of tape around that hole whilst doing so should stop water getting in the breather pipe.

200sx said:

Will it be safe to use a high pressure washer to clean it all off or am I at risk of damaging anything in this area

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Only thing I'd avoid are the seals - output shafts / UJ's etc - and the speedo drive or speed transducer - the latter may object to water at 150 Bar ! Regrease UJ's afterwards to expel any water.....

Also, as above, pipe is a vent - fix as above

200sx said:

Will it be safe to use a high pressure washer to clean it all off or am I at risk of damaging anything in this area

The interior will get soaked but most of its removed at the momment

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Pressure washer's okay, then use lots of Gunk to remove final crud/dirt, leave to soak for a good few days then hot wash off. Used carefully, oven cleaner really brings up gearbox casings

Sweet cheers guys. It’s only going to be for off roading so I won’t go to OCD on the cleaning as it’s only going to get dirty again

200sx said:

Sweet cheers guys. It’s only going to be for off roading so I won’t go to OCD on the cleaning as it’s only going to get dirty again

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No No No. You really need to keep on top of cleaning the underside. Big joke here is that I pressure washed the underside every couple of months on my 90, if she had really dirty then next day. I don't think the body had more than a quick flash over in 10 years.

frog hopper said:

No No No. You really need to keep on top of cleaning the underside. Big joke here is that I pressure washed the underside every couple of months on my 90, if she had really dirty then next day. I don't think the body had more than a quick flash over in 10 years.

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+1 for this

on the farm if i have to go anywhere near the cattle yards or in a field where they have been then recently i always wash mine as Cattle poo is bloody corrosive and has killed a couple of early discos in the last 10 years ( not mine owned by the farmers, who only wash a vehicle when they can't see out of it...)

So my top tip , unless you like laying under it with a wire brush and angle grinder and then getting covered with sparks as you try and weld it to repair your chassis clean it regularly underneath..

Cheers guys, will do