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Old 04-21-2013, 08:19 PM   #1
 
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Heard a constant noise coming from the engine bay so did some checking and found this.




New lifters, gasket, and cam will be on order and hope to have everything back together and tuned by Saturday.
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Old 04-21-2013, 09:11 PM   #2
 
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see that all the time at the dealership I work at
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Old 04-21-2013, 09:32 PM   #3
 
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I'm sure that is the stock DOD crap they put in these cars but this is all aftermarket.
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Old 04-21-2013, 09:54 PM   #4
 
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da fuq, haven't seen that happen on any aftermarket stuff..

what company built the cam?
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Old 04-21-2013, 10:34 PM   #5
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I was in the same situation...

http://www.thechicagogarage.com/foru...tml#post828576
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Old 04-22-2013, 06:20 AM   #6
 
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Quote:
Originally Posted by 6literEat'r View Post
da fuq, haven't seen that happen on any aftermarket stuff..

what company built the cam?
Bullet cut the cam and those are Lunati link bar lifters. Think maybe the check valve inside of it failed or was gummed up somehow. I wanted a new cam anyway so I got my wish in the end.
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Old 04-24-2013, 02:17 PM   #7
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That happened to me like 3 times with LS7 lifters.
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Old 04-24-2013, 05:58 PM   #8
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Just peen the lifters in there to block the oil galley and run it on 7 cylinders...
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Old 04-24-2013, 06:47 PM   #9
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It happens all the time. My theory is either a bad heat treat on a roller or cam, or those cheap plastic retainers allow the lifter to rotate slightly and allow the cam to "shear" against the roller and eventually weaken it
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Old 04-25-2013, 11:03 AM   #10
 
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After consulting a few people, the popular theory seems to be that the grind on the cam was a little rougher than it should have been causing the track marks shown on the lobes.



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Old 04-25-2013, 11:32 AM   #11
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Damn, hopefully it didn't send anything into the motor to hurt that too.
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Old 04-25-2013, 01:37 PM   #12
 
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^^ I would expect if there was metal in the motor that this would have occured pretty soon after the cam swap. It has been over a year and now a problem develops and my guess is any metal that appeared would have come from the damaged lifter.
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