To embark on yet another tangent I discovered another VAG oddity this morning. As I intend replacing the clutch and gearbox in the MKII Octavia tomorrow I had the manual out to jot down the various torque settings and such like when I came across the gearbox oil filling procedure. I'm guessing any DIY mechanic would assume you use the filler/level plug to fill the oil and set the level as we have done on most motor cars for many many years. In fact, I watched two Youtube videos which used that method, both produced by professional mechanics. However, that seemingly logical assumption couldn't be wronger.
The correct procedure is to fully drain the oil by removing both the drain plug and a bearing shaft and to fill with the specified quantity through the reverse light switch bore. The bottom of the "filler/level" plug is in fact below the oil level required. While you are not supposed to replace the oil unless the box has been (partially) dissembled I know most DIYers can't help themselves and do it periodically regardless. I did ask Stuart to change the oil in the MKII box when he done the clutch and he, somewhat reluctantly, agreed while stressing that it isn't necessary. Now I'm wondering if he followed the correct procedure or just filled to the level of the plug like the men in the videos I watched. Maybe that's why the box has failed but I guess it lasted a further 250,000 kilos so I can't really complain.
I appreciate how illogical this might seem so I've taken a few screenshots from the manual, as follows:
I'm guessing similar applies to other models not mentioned in the above manual so I'd strongly suggest any DIYers download and consult the relevant workshop manual and consult it as appropriate. I think I paid c€20 for each of the manuals I've downloaded - one for the MKII and one for the MKII. As far as I recall, I relied on a Haynes manual for the MKI.
Of course, anyone who wants an Octavia MKII and/or MKIII manual is welcome to a copy of mine.
