Is there a for sure way to test bad turbo seals ? Whatever is wrong with the car is gradually getting worse... the car has maybeee 500 miles on a fresh full rebuild I cant say the valve seals are 100% new cuz they stayed on the head when I rebuild it. But the bottom end is 100% new, wiseco pistons and rings etc, so all week it been smoking from the exhast pretty bad well got bad now, but at first it only smoked when start up for a minute or two, and then go away then the next few days did the same but now when I left off the gas a cloud a smoke came out but went away when I got back on the gas, now it smokes for about 15 mins at start up but goes to a very faint smoke still no smoke on gas but a massive cloud comes out when I let go of the gas... and it's for sure blue smoke a very distinct blue too