I think you mean the manifold box on top of the engine, the filter does not have bolts it has clips.For the the manifold box once the 4 torx bolts have been removed I had to slip a longish socket bar or similiar under the box across the engine & use this to lever the four manifold tubes out of the engine with a rocking motion from front to back this takes some time due to them being a push fit ,once free the box will slide towards you I had to do this to get access to the glow plugs underneath . dont forget to remove the unit with the vacume tube fastened to the top of the engine bulkhead or this will get damaged like mine did hope this helps Terryhow
Terryhow, March 2010
