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Exhaust smoke and MMO
Howdy folks,
After a year of reading posts and living with the puff of smoke every time I accellerated, I finally did the top engine cleaning with MMO...and it seems to have done the trick. I pulled the plugs, put in 2 tablespoons of MMO in each cylinder and let it sit over night. In the morning, I cranked it (without the plugs) for a few seconds. Replaced the plugs, changed the oil, and I've been smoke free ever since. My engine is running cooler than before. I'm also using 10w-40 now, rather than 10w-30, which is what I've run for the last 150,000 miles. So I'm not sure how much the smoking cessation is due to the MMO treatment, and how much is due to the heavier oil. Here's my question: when I pulled the plugs, the two outside plugs were dry. The two inside plugs had liquid oil (not just a film) on the threads. I'm sure this is why I was burning oil, but where is the oil coming from? The cylinders? The head? And ideas? Thanks. Barry '94 SL2 162,800 miles!! |
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#2
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Oil on plug threads is probably due to the valve cover gaskets needing
replacing. I'd suggest buying the gaskets from your dealer. It's an easy job - search the newsgroup to find out how. Good luck. "Barry Schnoor" > wrote in message ... > Howdy folks, > > After a year of reading posts and living with the puff of smoke every time > I accellerated, I finally did the top engine cleaning with MMO...and it > seems to have done the trick. > > I pulled the plugs, put in 2 tablespoons of MMO in each cylinder and let > it sit over night. In the morning, I cranked it (without the plugs) for a > few seconds. Replaced the plugs, changed the oil, and I've been smoke > free ever since. > > My engine is running cooler than before. > > I'm also using 10w-40 now, rather than 10w-30, which is what I've run for > the last 150,000 miles. So I'm not sure how much the smoking cessation is > due to the MMO treatment, and how much is due to the heavier oil. > > Here's my question: when I pulled the plugs, the two outside plugs were > dry. The two inside plugs had liquid oil (not just a film) on the > threads. I'm sure this is why I was burning oil, but where is the oil > coming from? The cylinders? The head? And ideas? > > Thanks. > > Barry > '94 SL2 162,800 miles!! > > |
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