post #1 of Old 04-27-2012, 03:02 PM Thread Starter
Jeslipaige
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2009 JK Wrangler 
 
Join Date: Jul 2011
Location: San Antonio
Posts: 29
Has anyone seen a FRACTURE like this?!

Noticed this bad boy a few days ago and took it to the dealership. All the guys there said they had never seen anything like it before. Even though my Jeep is no longer under warranty they are replacing the whole part for me at only a 50 dollar co-pay and thats only so I can have a warranty on it.

Anyone else had this problem?



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post #2 of Old 04-28-2012, 12:33 PM
Fuddmaster
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1994 YJ Wrangler 
 
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Location: Lakewood
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I had one like that on my power steering pump! Some jb weld fixed the problem!!
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post #3 of Old 04-28-2012, 04:49 PM
JBTJ
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2001 TJ Wrangler 
 
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Looks like somebody tightened a bolt to tight.
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post #4 of Old 04-28-2012, 05:26 PM
5-90
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I've seen that - generally, there are two potential causes:

- Overtightening of the screw. More common with iron parts than with aluminum (usually, the internal threads in the aluminum part just pull right out, you're left with a fairly smooth hole.)

- Void or other fault in the casting. I'd be interested in spreading that crack to see if there was an "air pocket" in there that would have led to the failure. Else, you've got a minor (relatively) internal stress riser that was caused by uneven cooling of the cast part, which could have also caused a casting failure (this will depend highly on whether or not that boss is "cast solid" or they have a core in place - since there will be a hole there anyhow. Depends on how the foundry does their work, and how well they recover their chips for reuse - better recovery means no-core bosses, which is better.)

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post #5 of Old 04-29-2012, 01:31 PM Thread Starter
Jeslipaige
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Thanks guys!
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