Join Date: Oct 2019
Feedback Score: 0 reviews
Valve cover mounting stud for turbo sheared
I had the same symptoms. However, I had a different cause. The U-shaped "hose assembly" had backed out of the air duct due to the shearing of the mounting stud which mounts to the valve cover. The stud is part # W302461. The upper front one (easiest to get to) was sheared allowing a gap between the hose assembly and the air duct.
Easy to get to. Took about 1 hour. Had to loosen all 4 stud mounts to get the one out. A set of new studs is only $18.
I knew where to look because last year, all 4 studs broke causing the hose assembly to back completely out and I lost my turbo. That was a 4 hour fix. Mostly just taking off all the stuff so I could get to the bolts.