hondo Posted August 22, 2005 Share Posted August 22, 2005 I changed the oil today and noticed there was a fait fuel odor in the old oil. I know that's not normal. Also, does anti-sieze compund corrode and leave a dark residue on plug threads? I replaced the plugs, and on the threads was a dark residue ( I'm hoping that it's not motor oil ). There weren't any problems on the ignition points though. No oily residue- It was quite dry and clean, save for some carbon build up. So I don't know... Thanks ahead of time. Link to comment Share on other sites More sharing options...
lastchance Posted August 22, 2005 Share Posted August 22, 2005 Uh...I hope this is normal, every time I've ever changed the oil in my carby it's smelled a bit like gas. Link to comment Share on other sites More sharing options...
KStretch55 Posted August 22, 2005 Share Posted August 22, 2005 Nothing wrong with a faint smell, but it shouldn't be strong. Normally, anti-seize is a dark gray or black compound, due to the molybdenum in it. Molyb is a soft metallic element kind of like graphite. It's what makes the anti-seize compound work. It forms a barrier between the cylinder head and spark plug that keeps rust or other oxydation from forming. Link to comment Share on other sites More sharing options...
Ross Posted August 22, 2005 Share Posted August 22, 2005 How much your oil smells of petrol depends on what kind of driving you do - if you do lots of stop-start around town driving, there can be a considerable amount of petrol dissolved in the oil. Link to comment Share on other sites More sharing options...
hondo Posted August 22, 2005 Author Share Posted August 22, 2005 Okay. about the fuel odor, that makes sense then. I have to do a lot of start and stop. But the dark residue around the threads of the plugs--deffinately didn't look like anti-sieze comp. Link to comment Share on other sites More sharing options...
KStretch55 Posted August 25, 2005 Share Posted August 25, 2005 Were your plugs adequately torqued? You'll get a greasy black residue if they aren't, due to oxidation of the aluminum heads vibration against them. But, I think you'd hear it if they were that loose. Link to comment Share on other sites More sharing options...
Nug Posted August 25, 2005 Share Posted August 25, 2005 Black crud on spark plug threads isn't uncommon, or a cause for alarm, IMO. Link to comment Share on other sites More sharing options...
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