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Unfortunately all VAG group vehicles use the same style of rubber grommet on the end of drain tubes, whether it is from a sun roof, cabriolet roof or just windscreen trough, in 1999 passats flooded the main comfort control ECU that was in a recess in the passenger side floor due to it, audi TT cabriolets fill the bulkhead behind the driver failing the fuel pump module and EOS models overflow and drip into the car, I can go on forever listing all VAG models, the rubber grommet is pinched together with a thin slot on the end to stop insects getting into them but actually trap crap from getting out, I always chop the last 1/2 inch off with scissors leaving a nice round hole and no further issues.

Engine out and broken down timing chain tensioner top left and top right got broken runner on the ends so need replacing rest are in very good condition had too order a new valve springs remover as mine to big to do the seals, mainly doing cleaning for now and leaving the cats and headers in a cleaner solution 20221012_114313.mp4

Not sure what make the tyre are of if you have found one of our nations many pot holes recently but I had a Q7 in recently with almost exact same issue, the rear tyres were mid range economy brand and one had broken wires in the rubber compound leaving it slightly oval as a result, this is not picked up or effected by balancing but can be found by your tyre guy by fitting on machine and holding a tool like tyre bar or big screwdriver next to tread whilst spinning, if you want to find which one it is yourself, swap one side from front to back, if vibration moves to front from back its the one you changed, if it does not it is the other rear, it is very unlikely to be anything mechanical because the diffs on these are proper not haldex diffs which vibrate for fun

Well the engine now out so now let the fun begin 20221009_165437.heic

I guess we are here trying to help, at anyone’s beck and call, and I think Steve Q’s welcoming responses to new posters - ‘we are a helpful and friendly bunch’ - and I genuinely think we try to uphold that. However, to post and ask for advice, but never even return to read it, let alone leave some acknowledgement, is taking people for granted, and frankly rude - Genuine reasons for not returning, accepted. Kind regards, Gareth.

Reading all these posts even though they do go back two years I am afraid the newer model of Q7 is not as robust as the previous 4L and 4M models, I work on many basic issues on more late models than earlier ones although I have more early models on my books for regular services, some of the components are sourced by Germany from China much like I phone do in the USA, Many, many large manufacturers do this now although they do not publicise it, unfortunately China are particularly bad at cutting corners on metal quality re-using all the scrap they buy from around the world which contains many impurities and results in weakness, I recently diagnosed a stretched timing chain set on a 56,00 mile 2017 tdi which had to go back to the dealer as extended warranty repair, it took three weeks?? and cost the warranty company £12,000. I would recommend anyone with a vehicle newer than 2014 to take out a warranty with RAC or warrantywise or even the dealer, the costs of repair at dealers is going through the roof and expensive electronic components run in to thousands not hundreds. On a brighter note it could be a lot worse, you could own a Land Rover, our local dealer charges £190 an hour and Quentin Wilson who owns Warantywise recently published the top three cars he pays the most claims out on; RR Vogue, RR Sport and Discovery!