Hello everyone, after multiple repairs on my 280 sl which I am completely taking over, injectors, water pump and the entire water circuit. Full ignition. Compression test no problem. Full engine check, no engine noise, everything is fine. It works perfectly but the car has been smoking white for quite some time when starting up but also when running at high speed before all this work. I noticed after 15 km since this work that I have a white liquid forming above the rocker cover. And yes I'm thinking of a head gasket. To avoid polluting all the changed hoses including the new water radiator, I am thinking of doing the cylinder head gasket. So I'm looking for a tutorial or a link including the necessary materials to avoid doing anything stupid. I can't find anything. This is not my first cylinder head disassembly to make the gasket but never on this engine. The distribution chain seems to have been changed in 2004 and the cylinder head was rectified and the guides changed. Is it necessary to change it again as a preventative measure? Thank you all for your help.