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Discussion Starter · #1 ·
Today I picked up an 1982 cx500. I do not know much about this engine. The engine idles good but anything above 3000 rpm's it knocks and shakes like crazy. I have the engine out of it now and the heads, clutch, and back and front covers off of it. I have not found anything wrong yet. Could it be an rod or crank bearing or am i just missing something. I would like to get your guys input before I go any further. Any and all help would be appreciated. Thank.
 

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Today I picked up an 1982 cx500. I do not know much about this engine. The engine idles good but anything above 3000 rpm's it knocks and shakes like crazy. I have the engine out of it now and the heads, clutch, and back and front covers off of it. I have not found anything wrong yet. Could it be an rod or crank bearing or am i just missing something. I would like to get your guys input before I go any further. Any and all help would be appreciated. Thank.


What did the old oil look like? Aluminum flakes? Bronze looking flakes?
 

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Time to mike out the bearings.
 

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Yep. Unfortunately, some people believe you when you say "the CX goes and goes forever" they forget to do the regular things like change the oil, re-tension the timing chain, change the diff oil, etc etc.



And a common problem with this beaut little twisted twin is the bottom end bearings. With evidence of copper, anywhere in your engine cases, it'll be the bearing shells.



Not sure if 10 thou oversize bearings are available in the US, but, cant get 'em in Aussie.

So,if the crank has any grooves in the bearing surface, its second hand one's over here.
 

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Yep. Unfortunately, some people believe you when you say "the CX goes and goes forever" they forget to do the regular things like change the oil, re-tension the timing chain, change the diff oil, etc etc.



And a common problem with this beaut little twisted twin is the bottom end bearings. With evidence of copper, anywhere in your engine cases, it'll be the bearing shells.



Not sure if 10 thou oversize bearings are available in the US, but, cant get 'em in Aussie.

So,if the crank has any grooves in the bearing surface, its second hand one's over here.
probably more cost effective to look for another engine....sad as it is
 

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Discussion Starter · #7 ·
Yeah I got it all a part last night and it was the rod bearings. They also dug up the crank pretty good. So yes a new engine it will have to be. But now I will have all the spare parts but a crank so it anything else goes bad i will be set. Thanks for the help guys.
 
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