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Ha, yes so am I ...thanks !! I’ll post some photos of the makeshift repair but basiscally the original diaphragm (left hand pcv) was split in multiple places and the tongue had separated. I have replaced this one with new OEM for £150 ... there is no alternative and although you can get replacement ...

Ok, here’s the answer.... thanks both for your input... much appreciated 👍... the short version...yes indeed Rusty Racer 👍...left hand PCV diaphragm and tongue seal perished and split so valve not functioning! Good news the PCVs (2 - one for each bank, are right at the top and easy to access... I di...

Had a good look at the (many) videos of the rebuild (B8 4.2 CFSK engine) etc but I’m still struggling with this secondary air pump... on the left side there is the water pump and the air con compressor driven from the aux gearbox in the timing cover and on the Right there is only the starter motor a...

Cheers... that’s interesting and sounds relevant... I’ll see if I can find that video

Hi thanks, yes that was one of my suspicions but when I searched through the workshop manual around the secondary air system it looks like there is an electric pump at the front behind the secondary coolant radiator and having poked and listened around there I couldn’t pick anything up. If there’s a...

RS4 B8.5 high pitched squealing / screeching sound when warm and throttle closed. Help! Hi I am new to the forum and hoping for some expert advice. Problem started about 3 weeks ago - there is a piercing metallic sounding high pitched squealing sound (bit like an idling jet engine) which occurs soon...