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  #2001 (permalink)  
Old 11-09-2012, 10:52 PM
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Question

Originally Posted by rscarawa View Post
Stick with a company with a large, well funded, R&D dept. That knocks out Redline and Amsoil in my opinion.
For example like Mobil One?
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  #2002 (permalink)  
Old 11-10-2012, 04:49 AM
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Originally Posted by STINGRAY View Post
For example like Mobil One?
Yes. Mobile is a real oil company.
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  #2003 (permalink)  
Old 11-10-2012, 08:15 PM
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Redline products work.
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  #2004 (permalink)  
Old 11-10-2012, 10:14 PM
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I would bet, you could possibly see the TC/shoe issue in a log file before it pops.
It would swing timing, being unstable and show in the pid data.
Be interesting for someone to putt putt around while doing a log with mentioned broke tensioner and slack in the chain.
It may be measured, when the motor is apart with a degree wheel. See how many deg back and forth. Simulating in and out throttle, then it should match the pid log file in deg of timing.
Now we would have a base line for worn to broke tensioner. In Theory anyway.
Course as mentioned if bad enough should throw a codecrank or cam sensor.
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  #2005 (permalink)  
Old 11-11-2012, 07:49 AM
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What pid would record cam timing? I don't think it would affect ign timing would it?
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Old 11-11-2012, 08:38 PM
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I sent this topic to a buddy that was an exec. engineer for Chrysler just a few years ago & a real gearhead, he forwarded to several high-ups he knows that still work there - here is a response: (lame IMO)

Regarding the Hemi timing chain, the only thing I have learned is regarding MDS engines at very high mileage wearing the guide, often related to poor oil change maintenance. The manual transmissions do not have MDS, so it should not be an issue for your friends. Besides, I'm sure they keep oil changed.
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Old 11-11-2012, 09:31 PM
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Originally Posted by Powerstick View Post
I sent this topic to a buddy that was an exec. engineer for Chrysler just a few years ago & a real gearhead, he forwarded to several high-ups he knows that still work there - here is a response: (lame IMO)

Regarding the Hemi timing chain, the only thing I have learned is regarding MDS engines at very high mileage wearing the guide, often related to poor oil change maintenance. The manual transmissions do not have MDS, so it should not be an issue for your friends. Besides, I'm sure they keep oil changed.
So SXT models definitely don't have this same problem as they don't have MDS?
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  #2008 (permalink)  
Old 11-11-2012, 09:41 PM
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Originally Posted by STINGRAY View Post
So SXT models definitely don't have this same problem as they don't have MDS?
Nah, they just have bad heads.

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  #2009 (permalink)  
Old 11-12-2012, 04:57 AM
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Originally Posted by STINGRAY View Post
So SXT models definitely don't have this same problem as they don't have MDS?
That's part of it. The Pentastar has a very different design.

You have asked this question before and it was answered with a similar response.





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Old 11-12-2012, 05:48 AM
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Originally Posted by Powerstick View Post
I sent this topic to a buddy that was an exec. engineer for Chrysler just a few years ago & a real gearhead, he forwarded to several high-ups he knows that still work there - here is a response: (lame IMO)

Regarding the Hemi timing chain, the only thing I have learned is regarding MDS engines at very high mileage wearing the guide, often related to poor oil change maintenance. The manual transmissions do not have MDS, so it should not be an issue for your friends. Besides, I'm sure they keep oil changed.
Not for nothing, it does return us to the question of...how/where does the chain guide shoe get its lubrication? We know it is possible for it to wear prematurely and snap through. Is it possible to determine if it was getting lubrication? Does it just come from incidental oil that is on the chain? Does it come from some exclusive port? If there is a port, can it be traced where that port could potentially get clogged by debris?
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Last edited by randycat99; 11-12-2012 at 05:49 AM.
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