Some of the pics in another thread disappeared so I spent 20mins this eve to do a little guide on how I do the transfer box breather to extend it for wading.
I’ll do gearbox and diffs soon as well because I’ve got some that need doing.
First use some mole grips to remove the factory breather.
Clamp them on nice and tight and with a twisting back and forth action the breather will pop out.
Now you need a 1/4” BSP tap, I just go straight in with a bottoming tap, being careful to keep it nice and square. It’s a bit trickier to get it started with a bottoming tap so if you’ve got a 1/4” bsp taper tap use that first and then finish with the bottoming tap. The hole is a tiny bit oversized for 1/4” BSP but it’s close enough to work with no issues.
Use a nice big blob of grease on the tap to catch as much swarf as possible. Don’t worry if you can’t get it all out, a tiny bit of soft aluminium swarf isn’t going to hurt anything in the transfer box.
If you notice some drop onto the baffle you can fish it out with a blob of grease on a pokey thing…I used a drill bit
Then screw in a 1/4” bsp right angle push fit fitting for an 8mm hose. You have to use a right angle fitting as there’s not enough clearance for a straight fitting. If the fitting doesn’t have a seal then use some PTFE tape or thread sealant on the fitting for a good seal.
Then run the tube up somewhere nice and high somewhere safe in the engine bay.
