When I went to change the oil for the first time after I’d had this car (Astra Mk 3 Sport 2.0i Ecotec), the sump plug wouldn’t come out – it just went round and round. So I took it back to the garage I’d got it from and they somehow got the plug out. The thread was completely stripped. They said it was a known problem with these engines as the plugs are made of some ultra-nasty alloy, and that they also had to fit a new thread in the sump.
So, four months later, I come to change the oil again (you can’t do it too often!), and this time the plug came out OK. But on trying to put a new one in, I couldn’t start it by hand, and was afraid to wind it in with the torx spanner. The old plug’s thread wasn’t brilliant, but it was useable, so I put that one back in. I also couldn’t see any obvious sign that a new thread had been inserted into the sump, what would this look like? Was the garage lying to me about that bit?
Has anyone else had this trouble, and what have you done about it? Would it have been OK to force the new plug in, with the possibility that I wouldn’t be able to get it out next time? Why are these plugs so bad? Does anyone do a better one?
Any suggestions much appreciated.