Hi all, I have a similar question. I am currently looking to buy a Patrol and have seen a few. Most are pushing smoke out of the oil filler cap (a trick I learnt to check the rings) and one was pushing air out like the vents in the cab with the fan on high. I realise they need to push out some air but I too am curious as to what amount is considered normal and what might be causing excess air to be exhausted this way.
If there are any other things I can look for when purchasing that would be highly appreciated, will be checking out a 2003 GUiii 3L with 260k, 5 speed manual tonight. Add says it has full NADS kit with diff breather and 3" dump & exhaust - hoping it is in good nic as I would love to own it.