I took my cylinder head off my 89 2.6L 190E. I took it off per the instructions one of my friends got me at his work, lining up the timing marks on the sprocket and the Cam. Off comes the head, and the first cylinder is about halway up. My owners manual says it's 9 DBTDC. Is that 9 degrees back from top dead center? I marked the crank pulley so I can put it back how it came off. I've been cleaning everything out while the head has been at the machine shop. So can you zero everything out when putting the engine back together? What parts get sealant? It looks like there was some on the head gasket. The intake and exhaust gaskets were rather dry, so I couldn't tell if or when they had sealant. The instructions didn't say anything about application of gasket sealant in the assembly section. Does anything get sealant?