I've tried posting this question before but not sure and still not sure if it's getting to you Scotty.
Bought the truck new mid 2006; was a demo model with only 6,000kms. I know have just over 601,000kms on it. Love this truck since owning it all I've had to do on it other than regular maintenance inclusive of timing belt (all pulleys, tensioner and water pump - done about every 160,00kms)are the following: alternator, right drive shaft, main driveshaft, and just recently, both front control arms, both outer tie-rod ends and both front wheel bearings. Please note, I've never had the valves adjusted and yes I know I should have and maybe I'm paying the price now.
Now for the real issue and question: it's been blowing smoke on cold starts only and I suspect I have bad valve seals. I was wondering if you would recommend me changing the seals myself without removing the head ( I've seen quite a few videos with people either using the rope method or keeping pressure in the cylinder while changing the seals)?
I just saw your video when you recommend using AT-205 Re-seal and will do that first before going forward with anything radical.
Almost forgot to add that the main reason for At-205 is for a leak I am told from my rear main seal and hoping it will rejuvinate my valve seals as well.
I still would like to know your answer to my question.
Love your video's very informative and entertaining. You make a lot of sense.