So, the engine top end, is usually everything above the cylinder head gasket. This would include everything, in engines that have a overhead camshaft (OHC).

GM 3100 – 3400 Engine Issues – Cylinder heads, manifolds, rocker bolts
GM 3100 – 3400 engine issues, are still happening and are being repeated. We still have leaks, installation problems, as well as cylinder head and rocker bolt issues. That’s because, most people are still confused […]