Rear diff is leaking
03 February 2008, 06:50 PM
#1
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Rear diff is leaking
From the top somewhere
What could it be?
It's a 1999 WRX STI Type-R
Running all standard transmition and engine (Except for the 3" exhaust & decat)
What could it be?
It's a 1999 WRX STI Type-R
Running all standard transmition and engine (Except for the 3" exhaust & decat)
04 February 2008, 01:56 AM
#3
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get it checked lad.
if it went wrong and locked up it could be sideways into a ditch.
iv the same cars as u but id a rally diff and it was tight as a nuns .....
so i changed it cos it was eating clutches, and it passed 3 nct's and failed the 4th and there was no difference..
try api they seem to be a fav on here.
mite have an answer
if it went wrong and locked up it could be sideways into a ditch.
iv the same cars as u but id a rally diff and it was tight as a nuns .....
so i changed it cos it was eating clutches, and it passed 3 nct's and failed the 4th and there was no difference..
try api they seem to be a fav on here.
mite have an answer
04 February 2008, 10:51 PM
#5
Yes. It is a simple plastic tube with a clip-on/snap-off top cover. Tucked right up the top on the alloy rear cover. Hard to get at in the car though.
It could be causing pressure to build up if blocked.
Here it is, top right hand cover bolt, biscuit coloured.
It could be causing pressure to build up if blocked.
Here it is, top right hand cover bolt, biscuit coloured.
Last edited by 911; 04 February 2008 at 10:55 PM.
05 February 2008, 10:15 PM
#7
It is very tight behind the subframe and dropping the diff is hard work. Best persevere with long screwdrivers, plasters for the fingers and new swear words, usual tool kit stuff on an Impreza...
If the cover gasket needs changing you will need to pull the diff.
There are gaskets between the steel main case and each driveshaft bearing cover (alloy covers on each side) and of course there are lip seals for the driveshafts too!
Prise off the breather cover and clean. Replace and clean the diff as much as you can with water/gunk etc to remove all current traces of oil. Drive the car for a week, and then try to track the leak down (if it is actually leaking!)
I can get my diff out in 60 mins, but awkward heavy job.
With the car on a ramp (such luxury) it will be easy.
If the cover gasket needs changing you will need to pull the diff.
There are gaskets between the steel main case and each driveshaft bearing cover (alloy covers on each side) and of course there are lip seals for the driveshafts too!
Prise off the breather cover and clean. Replace and clean the diff as much as you can with water/gunk etc to remove all current traces of oil. Drive the car for a week, and then try to track the leak down (if it is actually leaking!)
I can get my diff out in 60 mins, but awkward heavy job.
With the car on a ramp (such luxury) it will be easy.
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05 February 2008, 10:16 PM
#8
It is very tight behind the subframe and dropping the diff is hard work. Best persevere with long screwdrivers, plasters for the fingers and new swear words, usual tool kit stuff on an Impreza...
If the cover gasket needs changing you will need to pull the diff.
There are gaskets between the steel main case and each driveshaft bearing cover (alloy covers on each side) and of course there are lip seals for the driveshafts too!
Prise off the breather cover and clean. Replace and clean the diff as much as you can with water/gunk etc to remove all current traces of oil. Drive the car for a week, and then try to track the leak down (if it is actually leaking!)
I can get my diff out in 60 mins, but awkward heavy job.
With the car on a ramp (such luxury) it will be easy.
If the cover gasket needs changing you will need to pull the diff.
There are gaskets between the steel main case and each driveshaft bearing cover (alloy covers on each side) and of course there are lip seals for the driveshafts too!
Prise off the breather cover and clean. Replace and clean the diff as much as you can with water/gunk etc to remove all current traces of oil. Drive the car for a week, and then try to track the leak down (if it is actually leaking!)
I can get my diff out in 60 mins, but awkward heavy job.
With the car on a ramp (such luxury) it will be easy.
06 February 2008, 07:11 PM
#9
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I can use the ramp at work for a few hours on a saturday morning,
Ill try removing the vent and cleaning it with break cleaner.
What usually causes them to weap? 2 much fluid in the diff???
Ill try removing the vent and cleaning it with break cleaner.
What usually causes them to weap? 2 much fluid in the diff???
07 February 2008, 06:52 AM
#10
Believe me, it is VERY hard to get too much oil in the rear diff!
IF the breather is blocked then as temperature rises the oil expands and I guess some internal pressure could form and eventually eject some oil. If the surface if the diff is dirty, the oil will migrate in the dirt and the oil leak looks far worse than it really is.
Give the diff around the breather area a good clean befor removing it so no grit drops in!
Let me know how you get on.
IF the breather is blocked then as temperature rises the oil expands and I guess some internal pressure could form and eventually eject some oil. If the surface if the diff is dirty, the oil will migrate in the dirt and the oil leak looks far worse than it really is.
Give the diff around the breather area a good clean befor removing it so no grit drops in!
Let me know how you get on.
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