Engine Knock- That elusive noise! (By Mcgovern61)

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mcgovern61

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Dec 3, 2009
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Location
Kingsport, Tennessee
My Bike Models
Former '82 GL1100 "The Slug"
This engine sounded like a diesel, Original thread by Mcgovern61
The following are video's of the noise it made followed by a tear down with photos of the main bearings.


Noisy start ups:



Rough running when cold:



Loud rapping noise that shows up above 3000 RPM:



Tracked it down with no load on the engine in this video (listen at 0:45 seconds and 1:03 seconds):



Bearing conditions, sloppy piston pins:



Lots of wear on the piston skirts (#2 & #4):

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#1 and #3 upper rod bearings:

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#4 upper rod bearing:

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Rear main crank journal bearing:

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Front main crank journal bearing:

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Center main crank journal bearing:

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