- March 2, 2016
- By robj
- In Bmw, Engine, Engine Refinements, TGTT
- 5667
- 0
Among the many things I did today the most fun was to deliver another N62SA today. The BMW had 150K on it and the secondary air ports were completely full of rock hard carbon. PS. The drill jig mounts to the head above the exhaust manifold so you don’t have to remove the exhaust manifold,