Had a problem with the brakes this morning so I checked the vacuum balance hose on my Weber 34 ict's and it was split at both ends where they turn 90[sup]0[/sup]. The hose to the non return valve was also split and the PO had wrapped insulating tape round the servo side of the valve and just pushed it into the servo hose! The valve was loose and it pulled out very easily. This pipe is rigid and can't be compressed and is ~15mm I.D. (Can't get my Micrometer in that tight space) Non return valve is working fine and is 13mm O.D. and not a tight fit. My questions are: 1. Is this the correct place for the valve? 2. What is the best way to connect the valve to the 'rigid' servo pipe?
Sounds like your servo pipe is a bit big. I think it's 1/2" you need. The non-return is usually the other side of the tinware under the van but it won't matter if it's in with the engine. I'd replace the pipe if I were you and get a good fit. While it may not impair your brakes immediately, these splits have been causing your engine to run lean for some time. If it's been getting hot, there's your likely culpret.
Done a bit of research on TheSamba and it seems that post '77 the servo pipe is a rigid plastic pipe that is flared (15mm I.D.) on the engine side of the firewall. The non return valve then fits into the flared end with the aid of a sealing grommet (211-611-833D) and is then clipped. VWheritage list them but are out of stock. http://www.vwheritage.com/vw_spares_Grommet-Sealing-pipe-T25-T2-211611833D_act_shop.product_pID_169272_lang_EN_country_GB.htm
Thanks for that, every day's a schoolday. You could still replace it with thinner hose, or if it'll still be long enough, cut the flare of the end? Or wait who know's how long? If you have an industrial estate with a hydaulic hose supplier on it they'll have something cheaper than the VW Heritage style prices.
Managed to source the sealing grommet from a supplier in Germany for £1.67 including P&P. I'll post back once its arrived.
