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When I bought this 1979 motor home, it had been sitting for 3 years but they had started it up periodically. I jumped it off & drove it 26 miles home & it ran pretty good. I bought new batteries & have been starting it up & running it without a problem. I drove it 5 miles into town 2 weeks ago to get gas for it. It ran fine but on the way back, about 3 miles from home, it started knocking. I thought it was the exhaust. I got home & checked the oil & it was fine. Yesterday I flushed the motor, drained the oil, removed the oil pan (it was fairly clean, no sludge), & put new oil in. Put new plugs in also. The motor started right up. At idle, I could not hear the knocking. When I reved it up, the knocking started. At idle its almost gone. Sounds like its on the passenger side of the motor but sometimes it sounds like right under the carburator. The motor was rebuilt by the previous owner who drove it to Texas & back to Tennessee. The motor has about 28,000 miles on it. I don't know what else to check. |