Club126UK
Fiat 126 Chat => Fiat 126 Mechanical Problem Solving => Topic started by: Gadge on February 17, 2018, 07:36:26 PM
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Changing the oil on any gearbox can be tricky. It’s usually the filling up part that tends to be the stumbling block as they never really have a filler cap like engines do. This has a lot to do with the fact that it shouldn’t really need changing that often (if at all) but the 126 gearbox is a leaky one and an oil change helps prelong the life and keep those gear changes nice and smooth :D it’s actually quite easy if you use some ingenuity and can easily be done in half an hour. This guide is on a BIS but can in most cases be applied to the air cooled one too.
To make life easy it’s best to get the back end in the air about 6-8 inches
(http://i122.photobucket.com/albums/o272/gadge1/Mobile%20Uploads/B5E58C56-7576-419B-BFF2-DBC1A4392B99_zpsw81qgifz.jpg) (http://s122.photobucket.com/user/gadge1/media/Mobile%20Uploads/B5E58C56-7576-419B-BFF2-DBC1A4392B99_zpsw81qgifz.jpg.html)
Once you’ve scrambled underneath look towards the starter motor and you will see a square nut sticking out the side of the gearbox. This is the filling point. I find it best to remove this FIRST as the last thing you want is to drain the old oil out and find you can’t fill it back up. It’s a funny size so I found a 1/2 socket end to be the perfect size so tap it on and use a 15mm socket on the other end. Here it is removed.
(http://i122.photobucket.com/albums/o272/gadge1/Mobile%20Uploads/F1BCD8E3-4B56-4190-8020-AA0974B66445_zpsbxfyojv6.jpg) (http://s122.photobucket.com/user/gadge1/media/Mobile%20Uploads/F1BCD8E3-4B56-4190-8020-AA0974B66445_zpsbxfyojv6.jpg.html)
With the filler plug out and making sure you have a Suitable oil container you can now undo the drain plug. It’s a standard Allen key so no drama there. It may be tight.once out let it drip for a bit.
(http://i122.photobucket.com/albums/o272/gadge1/Mobile%20Uploads/616AE2AC-DDE9-4DAA-8C5E-7C31E7400E51_zpssrj29tso.jpg) (http://s122.photobucket.com/user/gadge1/media/Mobile%20Uploads/616AE2AC-DDE9-4DAA-8C5E-7C31E7400E51_zpssrj29tso.jpg.html)
Once all the oil is out refit the drain plug. Now it’s time to refill. If you can, use a length of petrol hose - about 10mm wide - and push it in the filler hole. Push the other end up past the stater motor, then fit the biggest funnel you can in the other end. Because I have a BIS I tied the funnel to one of the engine lid levers. The oil choice is up to you but I used 20w50 mineral oil and it takes 1.1 litres.
(http://i122.photobucket.com/albums/o272/gadge1/Mobile%20Uploads/01CC49A7-A8D8-49B2-A03D-5B1B56835334_zpsgsmyvycb.jpg) (http://s122.photobucket.com/user/gadge1/media/Mobile%20Uploads/01CC49A7-A8D8-49B2-A03D-5B1B56835334_zpsgsmyvycb.jpg.html)
(http://i122.photobucket.com/albums/o272/gadge1/Mobile%20Uploads/13A52F4E-B7F4-4CBF-9F52-6D138ECF8135_zpsgtcrxzq8.jpg) (http://s122.photobucket.com/user/gadge1/media/Mobile%20Uploads/13A52F4E-B7F4-4CBF-9F52-6D138ECF8135_zpsgtcrxzq8.jpg.html)
With this done pull the hose out then refit the filler plug. Job done :D