Hello,
In order to replace those spark plugs, you will have to remove the upper intake manifold.
This will allow access to them.
https://www.2carpros.com/articles/replace-intake-manifold-gasket
I have attached the removal process for the upper intake manifold below.
Please let me know if you have any questions.
Thank you.
Images (Click to enlarge)
Jan 29, 2022 at 7:51 PM