Engine flush treatments on 03 Tacoma prerunner 3.4l v6

@shankyjones I took a picture of mine for you 2002 3.4l 120k miles well maintained on oil changes.

 

Thanks for the pic. Here is min3 for comparison
03 234k miles

 

Isn’t that the shield under the valve cover?
It’s thin, it gets hot so that discoloration is nothing to worry about

 

Has anyone used SeaFoam by adding it to the motor oil?


https://www.youtube.com/watch?v=3wMAsq7Zlp4

 

I have poured seafoam into the oil. It can clear up some issues. It's not good to run it for a long time since it thins out the oil. I would go with valvoline restore and protect to clean the internals now.
Sludge buildup is a big issue that dealerships never seem to recognize unless it's extreme. Sludge can cause the variable valve actuators to malfunction and clog oil return holes in the pistons. The dealership solution seems to involve replacing the sludged parts only.

 

Surprised it took until page two for SeaFoam to come up. I would 100% suggest SeaFoam over ATF or any other hearsay, as it's actually intended for the use. 1/3 in the crank case, 1/3 in the gas tank, and the other 1/3 of the bottle sucked into the intake manifold, 2-300 miles before your next oil change.