Alibro
Well-Known Member
Makes more sense as the only way to refurb VCU's properly is to take the discs out and clean them thoroughly. Any other way might work up to a point but will always be compromised by a mixture of old fluid and residual cleaning solvents.The VW Synchro VCU has 2 screw in plugs at 180° spacing which I assumed was allow the fluid to be changed. However on more research I found that the end cap can be unscrewed for maintenance. The 2 screw caps are in fact, a cast in lump and 180° round a brake type bleed nipple for filling and venting.
I'm going to make my own plugs and fill using a grease nipple. Hopefully pumping new fluid in will force the old fluid out. I'm thinking of orientating the fill at the top, hopefully allowing the old fluid out the bottom.
I used grease nipples on my first one but the nipples I bought were very shallow so there isn't much thread holding them in, only 5mm or so. The ends are around 10mm thick so if you can get nipples with more thread then do. I used one bolt on the second one and cut the bolt to length, I only drilled one hole and it worked fine, I welded a second bolt head on for balance.
Not sure if it helped strength wise or not but I bought extra fine bolts and nipples and used an extra fine tap.
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