So dropped the patrol of at Nissan dealer day before, and picked her up today. Verdict is after they looked at the leak, and cleaned the area out, and then drove for 150kms, that the wetness is from rust proofing. Which I have also noticed on the rear diff. The rust proof chemical must have a very low melting point, and the wet area was on the block, and near the exhaust manifold.
So I have been asked to keep an eye on it, and bring it back after 1000kms. But they do not suspect that engine oil is leaking. I too had my doubts as the engine oil was not depleting when checking the dipstick, or the transmission oil. But from the picture you can see it did not look good, and seemed that the leak was there.
Anyhow they also mentioned that they have never received a y61/tb48 with a leaking gasket. Hmmm so when it leaks, I am not taking it to them as they may not have experience on completing a head gasket job.
Anyway I have 2 night trip next weekend, which I can go on now!!
So time to do a little planning.