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Message: <blockquote data-quote="Yee Sang" data-source="post: 702" data-attributes="member: 795"><p>I got a 85 E30 auto with an engine problem. When car just started in morning or when engine is cool, no problem. Engine run smooth. When normal driving and engine run at normal temp, and or stop at traffic lights , the tapping sound come when press throttle. mechanic had tuned the engine and no result.use premium petrolcar not under heavy loadthermostat shows engine temp is normal.had top overhaul the engine year ago.change all vacum hoses and water hoses, fan clutch too.water pump is reasonable old.Is part of my engine overheating?The kind of sound produced is like the old Proton Taxi engine..Any expert out there who can help before i take it to the mechanic?</p></blockquote><p></p>