That doesn't seem like a thorough job, and a steel wire brush to clean the bore, ouch?? Won't do that on mine.Wow - what timing.... The Car Ninja does coolant pipes on an M54:
- uses a 90 degree pick and other metal tools to remove old broken pipe in bores
- uses a wire brush in a drill to clean bores
- no mention of RTV - but can't tell for sure.