nanardos 10 Report post Posted March 31, 2018 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 Quote Share this post Link to post Share on other sites
CarBuff 111 Report post Posted March 31, 2018 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). Quote Share this post Link to post Share on other sites
jonwat 159 Report post Posted March 31, 2018 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 Quote Share this post Link to post Share on other sites
nanardos 10 Report post Posted March 31, 2018 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 Quote Share this post Link to post Share on other sites
nanardos 10 Report post Posted March 31, 2018 In case you can't open the previous file... Quote Share this post Link to post Share on other sites
jonwat 159 Report post Posted March 31, 2018 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. Quote Share this post Link to post Share on other sites
nanardos 10 Report post Posted March 31, 2018 Thanks Quote Share this post Link to post Share on other sites
CarBuff 111 Report post Posted March 31, 2018 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/ Quote Share this post Link to post Share on other sites
nanardos 10 Report post Posted April 1, 2018 Hi Atwell, Thanks for your kind advice Regards Bernard Quote Share this post Link to post Share on other sites
dsvitesse1 38 Report post Posted April 2, 2018 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, 1 Quote Share this post Link to post Share on other sites
nanardos 10 Report post Posted April 24, 2018 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 Quote Share this post Link to post Share on other sites
CarBuff 111 Report post Posted April 24, 2018 Those vent tubes (#3 on your diagram) are nothing exotic. I replaced mine with vinyl hose from a hardware store. 1 Quote Share this post Link to post Share on other sites
nanardos 10 Report post Posted April 24, 2018 I am talking about the seal, not the tubes... Quote Share this post Link to post Share on other sites
CarBuff 111 Report post Posted April 24, 2018 In that case, the oil retaining washer and oil seal are A079F6282F (#6) and A079F6288F (#7) respectively. (Lotus part numbers) Quote Share this post Link to post Share on other sites
nanardos 10 Report post Posted April 24, 2018 Thanks Quote Share this post Link to post Share on other sites
nanardos 10 Report post Posted August 26, 2018 the leak w Quote Share this post Link to post Share on other sites
nanardos 10 Report post Posted August 26, 2018 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. Quote Share this post Link to post Share on other sites