Strange sound on cold start idle

Hey Bys,

First post. My girl is making a strange sound on and off while idling after cold start. Kind of kicks in and out as the truck idles. Kicks in and sounds like a clicking or piled up bearing. Then kicks back out again while it idles. This happens on and off until the truck is warmed up and then it’s totally fine. 2015 with 105K KM. Any ideas or help would be awesome.

 

Normal. They all do it.

 

Is it one of your secondary air pumps. They suck water in a wrecks the turbine bearings. One youtube mentioned to drill small holes in the bottom to let the water out. There is a bypass kit available.

Replacing Secondary Air Injection Pump for 2007-2013 5.7 Tundra Land Cruiser Sequoia - YouTube

 

You can also run new tubing into the engine bay with filters. Attached is a pricey kit. I gathered all the stuff I needed and am doing a diy version this weekend myself.
https://sdhqoffroad.com/products/07...uilt-secondary-air-pump-intake-relocation-kit

 

Thank you for the info. Really helped. I would not have figured that out.