[Chrysler300] Bearing pitting-electrolysis or corrosion?

[Rich Barber <c300@xxxxxxx>]

Oops-forgot to strip the HTML.

I should have made the point that the fix would be different.  
Relocating or adding ground straps to the block might be indicated.

C-300'ly,
Rich Barber
Brentwood, CA

Rich Barber wrote:

> I have read about this kind of bearing damage being attributed to 
> electrolysis from stray currents in large industrial engines.  Since 
> all corrosion is electrolytic, the results would look about the same.
>
> Rich Barber
>
> James McMullan wrote:
>
>>Hi chris.Cleavite is a alloy of aluminum, They alloy it to make it softer
>>as it is too hard for a bearing.The damage you are describing sounds like a
>>Acid problem.Some one did not change oil ? At least its better than Babbit.
>>Jim McMullan 300 F
>>
>>
>>  
>>
>>>Subject: [Chrysler300] how tough are 300C 392 conrod bearings?
>>>
>>>As part of getting ready for my earlier mentioned 'aussie new 300C versus
>>>    
>>>
>>57 
>>  
>>
>>>300C' meeting Wednesday, this afternoon I have just put new set of
>>>    
>>>
>>standard 
>>  
>>
>>>conrod bearings into the 392 motor.
>>>
>>>The bearings I took out were dated 1969, Clevite, and although not
>>>    
>>>
>>showing 
>>  
>>
>>>any wear through to copper, were pretty sad - widespread pock marks, mini 
>>>cratering, and on one shell, a whole centre piecs about 2/3rds size of
>>>    
>>>
>>small 
>>  
>>
>>>pea on one side area of centre of shell was gone, down to steel 
>>>shell/backing. Only about 4-5 shells looked like normal worn/used shells
>>>    
>>>
>>you 
>>  
>>
>>>would pull from other V8 motors.
>>>
>>>Any one got any clues re what is reason/cause, or do 392 hemis really
>>>    
>>>
>>load 
>>  
>>
>>>their shells more than other motors.  Main bearings looked great, and I
>>>    
>>>
>>do 
>>  
>>
>>>not normally rev motor over 5000 rpm, but do not know what former
>>>    
>>>
>>owner/use 
>>  
>>
>>>was.  I know with poured white metal vintage bearings, they can age, this 
>>>what these seem like as a first look, maybe cause, but in this case would 
>>>aging be caused by fatigue, rather than time?
>>>
>>>Weather forecast for Wednesday is for clearing - normally dry South 
>>>Australia is close to issuing localised flood warnings after rain that 
>>>started yesterday - hope they are right, my ex Los Angeles rust free 300
>>>    
>>>
>>got 
>>  
>>
>>>wet this morning going to garage with a better big hoist to make it
>>>    
>>>
>>easier I 
>>  
>>
>>>pull the sump.  The bearings just put in came from Egge, are I think King 
>>>(Israel) , so I hope OK.
>>>
>>>yours from oz, Christopher
>>>
>>>      
>>>
>>>
>>>      
>>>
>>




------------------------ Yahoo! Groups Sponsor --------------------~--> 
Get fast access to your favorite Yahoo! Groups. Make Yahoo! your home page
http://us.click.yahoo.com/dpRU5A/wUILAA/yQLSAA/8LmulB/TM
--------------------------------------------------------------------~-> 

To send a message to this group, send an email to:
Chrysler300@xxxxxxxxxxxxxxx

For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/Chrysler300/

<*> To unsubscribe from this group, send an email to:
    Chrysler300-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/