Thing is the reason we got the MV6 is that I have coolant loss ( not a lot ) on the Elite, and when I did the cam cover seal on 246 bank I think I may have seen coolant down by the oil cooler. I did the HBV again just before the cam cover seal and I now have misfire on number 5 cylinder so could be head gasket .
As likely to be the 135 camcover coolant might have been residual from hbv change... 3.2 Headgaskets are bombproof if car is looked after, and that wasn't out of your hands long enough to get screwed up
That's what I'm thinking, when I have done the jobs on the MV6 I will have a look, don't know how old the coil pack is on that bank, I put a new 246 on it 4 years ago. It started missing on the way up to get a Tech2 read at TB's the other month, but can't remember it being picked up but Jamie did say there was a miss every now and then, on the way home in traffic it was not getting any better but seems ok under load. I am still getting coolant loss but not a lot and as yet have not found out why.