Levo Gen 2 Water in the TCU - dead

[Roger20]

2020 Turbo Levo Comp and 5 months on just had my first dead TCU. Washed several times before (no pressure washer or strong hosepipe) but this time water got into the TCU.

At first the power level bars were still there but moisture was visible underneath. After taking it off, drying externally and then reconnecting it was completely dead. Battery removed and only 1.6v so replaced but still dead. Left overnight in the airing cupboard with the rubber bung removed and now fully back to life thankfully.

Can anyone say what the weak area is/are for water ingress into the TCU? I had sealed the connectors with electricians tape, all the cable entries and joints were covered with thick silicone grease as was the TCU to frame joint. So I thought it was well sealed but obviously not. The only bit I didn't grease was the rubber bung over the USB port but as this seemed fairly snug I didn't think water would get past.

I have read about plastidip and self amalgamating tape but these seem a bit extreme. Is completely sealing the TCU too extreme - ie does it need to breathe somehow? Presumably if the factory thought that complete sealing was necessary to make it IP67 they would have done that anyway?

If @Specialized Rider Care is reading this some guidance would certainly be appreciated.

 

[Mikerb]

the rubber bung is easily not fully replaced and can be damaged in the process. The TCU also has a seam joining top to bottom of the unit. I taped up the TCU with insulating tape, and sealed both the cable entry points and the cable connectors with amalgamating tape. I also made a rubber gasket to fit between the TCU and frame.....you can use a liquid gasket as an alternative if you smear a little grease on the frame first so the TCU is still easy to remove. It has been like that for nearly a year undisturbed. No issues.