Took my truck in last Monday to have the seat belts, the rear brakes, and of course to complain about the tapping on cold start.
I gave them the TSB's for the belts and brakes I found on TS, otherwise I don't think they would have done the work. The service writer tried to argue with me about the brakes stating that Toyotas did not have self-adjusting brakes. I had to explain about the parking brake. Where do they get those people! Guess you can't expect much from someone who writes a service order like this "Rear brakes seem like THERE DRAGING".
They had my truck for four days so I though for sure they had found out something about the tapping as it's been 10 degrees or colder every morning this week and I bet you could have heard the engine from fifty feet away, but no luck. They said it was normal injector noise. I told the service writer I would accept that if they started any of the new trucks on their lot and it made the same noise. He would not do it. If I stood talking to a wall at least I wouldn't get that dumb look they give you.
I think I am going to do what another member did and take my truck to an independent shop for their opinion. If they say it's a cracked header at least I will have something in writing as my 3 year warranty is up in a couple of months.
Thanks again Tundra Solutions.