Stroked68
This is FORD Country
What causes the normal buildup around the boots?
Are they leaking?
Just buildup. The boots dont really leak oil or anything. The air does have some oil particles in them and as joe said, the boots will leak through microscopically. Its just a normal area that needs attention to keep clean. Too much oil on them and high boost pressures could cause the boots to come off. You can buy a boot kit that will help fix that prob.