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Old 08-07-2014, 10:05 AM
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Join Date: Aug 2014
Posts: 2
Knocking noise from engine

Hi, we just got 89 560 sel, one spark plug is not working, there is a spark coming in, also there is like hummer knocking coming from inside the engine of that spark plug, any idea? Thank You,

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Old 08-07-2014, 10:51 AM
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Join Date: Nov 2008
Location: bristol,tn
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first check if crank shaft bolt is tight.If tight I would remove oil pan and check that cylinder rod bearing

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