https://www.detailingworld.co.uk/forum/showthread.php?t=386790
Not a Seat, but an interesting thread I came across. Buy the looks of it he's basically taken the car apart, refurbished or replaced and put it all back together again over the last couple of years!
I'm currently on page 13. Thanks for that, you *******.
Managed to get out today to run some Cataclean through the car. Added it to 1/4 of a tank and took it for a short drive. Doesn't seem to be any smoke coming out at low load revs anymore - there used to be a big puff when I accelerated from 30mph in third or fourth - but we'll see what happens in the weeks to come.
I wanted to run the cat cleaner through as it turns out my car didn't
really pass the MoT emissions test. I won't say too much, but the garage isn't a fan of emissions testing and so applies a different test limit from Halfords and Kwik Fit. I'm grateful to them for getting it through, but I want to keep emissions down as much as possible - not least because it points to an issue in the engine if the NOx emissions are high.
In other news, my knocking sound from the rear is back, so it probably wasn't the fuel tank scuttle. It sounds like it's coming from the offside rear door, so when I replace the lock eventually I'll be able to dig around and see what's what. It's totally random - sometimes it happens when I pull to a stop at traffic lights, other times it happens when I'm just driving along. If it made the noise when I hit bumps or when I was turning, it might be easier to track down, but I'm absolutely stumped. It's not the shocks, as they're new and the bolts are torqued, and it's nothing behind the wheel arch as I took those out to fit the shock top mounts. I'll check the door strike plate and make sure the lock is tight over the weekend.