Replacing cylinderhead

[Ian Williams]

Those marks are typical in a seven engine that has a seeping head gasket which was been allowing water into the bores, sadly all too common with modern head gaskets. With regular use they do often seal, however the problem seems to come when they just get the occasional short run after a gasket replacement, especially when surfaces and water transfer holes are not in perfect condition. I have said it before but my belief is that the modern asbestos replacement used in current gasket manufacture is too hard for our modest torque settings.