Bigtex
09-14-2019, 11:18 AM
Alright before I start I’d like to say that I am an amateur at working with engines. I probably made a really stupid mistake when going through this process that caused the issue I’m having. I just need help with identifying that mistake so that I can fix it.
WHAT I DID: because my 1984 200es started smoking pretty bad I decided that I would test my blossoming mechanical skills by replacing the rings and piston. I bought what I have verified to be the correct kit that contained the parts as well as the necessary seals for the engine. I followed the instruction of several YouTube videos and forums to complete the process. To the best of my knowledge, I did everything properly. Including, but not limited to, staggering rings, proper piston positioning, proper torque specs, re-timing, etc. There isn’t anything that I can think back to that I did wrong. I got the engine back on the bike and re-timed it. I also went ahead and changed the oil and spark plug. Once I got it started, I noticed the problem.
THE PROBLEM: upon starting the engine, I noticed that there was a good bit of smoke coming from the crank case vent. Something that I hadn’t seen before. I opened the oil fill cap and the exhaust was coming out through there! The oil cap was acting like the tailpipe. There was also a sizable oil leak from the seal between the cylinder and the crank case but only while the engine was running. The engine was running fine by the way.
THE QUESTION: I obviously have messed something up really bad along the way. I’m not sure what I did. So any thoughts or ideas on what I did wrong would be greatly appreciated. Thanks!
WHAT I DID: because my 1984 200es started smoking pretty bad I decided that I would test my blossoming mechanical skills by replacing the rings and piston. I bought what I have verified to be the correct kit that contained the parts as well as the necessary seals for the engine. I followed the instruction of several YouTube videos and forums to complete the process. To the best of my knowledge, I did everything properly. Including, but not limited to, staggering rings, proper piston positioning, proper torque specs, re-timing, etc. There isn’t anything that I can think back to that I did wrong. I got the engine back on the bike and re-timed it. I also went ahead and changed the oil and spark plug. Once I got it started, I noticed the problem.
THE PROBLEM: upon starting the engine, I noticed that there was a good bit of smoke coming from the crank case vent. Something that I hadn’t seen before. I opened the oil fill cap and the exhaust was coming out through there! The oil cap was acting like the tailpipe. There was also a sizable oil leak from the seal between the cylinder and the crank case but only while the engine was running. The engine was running fine by the way.
THE QUESTION: I obviously have messed something up really bad along the way. I’m not sure what I did. So any thoughts or ideas on what I did wrong would be greatly appreciated. Thanks!