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Gear oil blowing through the breather



DrR

ClioSport Club Member
  VW Golf GTD
Top level bung?

The plastic butterfly screw on the side?
 

Coops Mk1

ClioSport Club Member
  Lots of Scrap...
ai level/fill hole is on the front of the box about halfway up, if you've filled it any higher than that (about half full basically) then it'll blow out all over
 
Mine blows slightly and I changed the box oil via the butterfly screw cap. Its been doing this for 2 years now, its probably the breather seal but its so minimal I've just left it.
 

JamesBryan

ClioSport Club Member
Mine blows slightly and I changed the box oil via the butterfly screw cap. Its been doing this for 2 years now, its probably the breather seal but its so minimal I've just left it.

Sounds knackered mate, you're going to have to get a rebuild and a diff at the same time unfortunately :tongueclosed:
 
  clio 172 track
ai level/fill hole is on the front of the box about halfway up, if you've filled it any higher than that (about half full basically) then it'll blow out all over
No it's got the correct amounts of fluids used the breather to fill as it's easier but removed the level bung to confirm she was full enough, it's almost like it's breathing heavy and throwing it back out via the breather pipe
 
Must have taken you forever to fill it via the breather! Surely easier to just take the butterfly off and use some hose?

If you've put the right amount of oil in and it's not leaking anywhere then I wouldn't be too worried myself. Always worth someone who knows the boxes well though like @NorthloopCup
 

NorthloopCup

ClioSport Moderator
If it's not overfilled, there's not much else that can cause it tbh. You could always try lengthening the breather pipe. Renault did this with the later 130 boxes.
The internal part of the breather has a Z kinda shape to it to stop this from happening, so it's possible (but unlikely) that it's either damaged/split, or completely fell apart. Again, unlikely though.

Is it definitely coming out the breather?
 


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