differential housing drain plugs

[nanardos 10]

Hi Everyone,

I have seen what I think is coolant (?) coming out of the two differential drain plugs 

Do you know where this liquid comes from ?

Bernard

[CarBuff 111]

If it's on the OUTSIDE (in other words, a coolant-colored drip on the bolt-head)  it might be coming from the coolant line that connects to the right side of the block, near the #4 cylinder.  

I've needed to tighten that one a couple times.

 

Can you post a picture?

 

 

 

BTW, an HCI should have a C35 transmission, with ONE drain bolt (21 or 22 mm head).

 

 

[jonwat 159]

34 minutes ago, CarBuff said:

BTW, an HCI should have a C35 transmission, with ONE drain bolt (21 or 22 mm head).

I thought later versions of the Citroen box had two drain plugs.

https://www.deroure.com/diagrams.asp?TBL=6627&MAK=1&MDL=46&SMA=0&SMO=0&ST=&SC=0

[nanardos 10]

Hi,

I am talking about the DIFFERENTIAL drain plugs 

The liquid comes out from the rubber tube extension of the drain plugs part n° 3 on the attached manual picture

diff drain plug.pdf

[nanardos 10]

In case you can't open the previous file...

[jonwat 159]

It sounds as if the transmission has been over filled with oil which is escaping through the output shaft housing drain hose.

Remove the oil level plug & check the level.

[nanardos 10]

Thanks

[CarBuff 111]

OK, I call those the VENTS.  It is somewhat normal for those to 'sweat' trans lube...but certainly not coolant.  There isn't coolant anywhere inside, there.

 

On a G-car, however, the coolant header tank does not have an overflow reservoir as today's cars do. If the header is overfilled (to more than 1" or 25 cm below the neck) the hot coolant will expand, and vent out of a hose at the neck. 

 

This hose points DOWNWARD, and could conceivably aim at the axle outlet housings.  Which is better than pointing towards the RH inboard brake disc!!!!!

 

Perhaps you need to renew the pressure cap on the header tank.  It is a one-bar (15PSI) unit as I remember.

 

PS: Regards overfilling the trans, Harry Martens (the tranny wizard) recommends overfilling the Citroen trans by a half-liter.

http://ds-vitesse.com/en/

 

 

 

 

[nanardos 10]

Hi Atwell,

Thanks for your kind advice

Regards

Bernard

[dsvitesse1 38]

HI guys,

 

these drains are only for leading the oil away from brake disks in case of failure of seal. If oil comes out, the seal is worn. No worries for over fill, there is no pressure inside gearbox. I advise to use 3 liter oil instead of 2.25 . Better for lubrication of 5th gear. 

 

cheers,

 

 

[nanardos 10]

Hi Harry,

Could you please kindly tell me what part number is the seal you are talking about on the drawing above ?

(and if you sell it ?)

Regards

BL

[CarBuff 111]

Those vent tubes (#3 on your diagram) are nothing exotic.  I replaced mine with vinyl hose from a hardware store.

[nanardos 10]

I am talking about the seal, not the tubes...

[CarBuff 111]

In that case, the oil retaining washer and oil seal are A079F6282F (#6) and A079F6288F (#7) respectively.  (Lotus part numbers)

 

 

[nanardos 10]

Thanks

[nanardos 10]

the leak w

[nanardos 10]

I have just discovered that the problem was not a worn oil seal but a loosened nut (bearing to output shaft) and loosened locking screw of this output shaft nut.

I had to make a special tool (see attached pic) to relock the nut and, although it was only a bit dry, I replaced the old oil seal with new one.

I also had to fabricate and replace the output shaft housing paper gasket  (thickness = 0.17mm).

I would not recommend anyone to embark in this repair if you don't have the special tool to relock the nut.