Done my 2nd oil change yesterday and again had trouble removing the sump plug. Last year the sump plug just turned in the hole and then eventually bit to the thread and came out. Upon investigation of the old sump plug one of the thread on the plug was broken. I thought I could have damaged the thread in the sump but the new plug went in and tightened up nicely. 1 year on and it was time to change the oil again. Again I had the same problem. This time however when I got the plug out the threads on it were fine. So now I think the thread did go last time and I was just lucky that the plug tightened all the way as the plug I put in yesterday goes tight then when you try to tighten it more it goes loose.
It is currently as tight as I can do it before it goes loose and there is a slight leak. I have phoned the garage and my mate has a sump repair kit which he thinks should be able to sort the problem out without the need for a new sump.
I recently helped 2 mates do their oil, one Seat and one Vauxhall, and they went perfect. Is this a regular problem with the mk4 sumps as when I come to do it next year I want to be able to do it with out breaking anything lol!
