What caused this damage

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dmuney

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All I'm looking for is to find out the cause of the damage what started this whole mess 2005 Ram 5.9 #1 piston & cyl damage had major blow by removed head and pan changed piston & rings Saved $ for a rebuild and now I'm ready to rebuild it but waiting to make sure I get rid of the problem first

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R/T_Fire

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What does the top of the piston look like? Typically when EGT's are too high it burns the top of the piston, you may have a leaky injector or a blown out ring.

Are there any burn marks from where the injector sprays, kinda like a flower with 6 pedals in the middle?
 

SilverStreak88

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See the melting? Dead give away... I know you said on the other forum that it was a CAI and strait pipe, but unless it was pure negligence on upkeep they ran tuning.
 
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dmuney

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What does the top of the piston look like? Typically when EGT's are too high it burns the top of the piston, you may have a leaky injector or a blown out ring.



Are there any burn marks from where the injector sprays, kinda like a flower with 6 pedals in the middle?



The scratch marks on the crown are from it riding around in the bed of the truck.
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dmuney

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See the melting? Dead give away... I know you said on the other forum that it was a CAI and strait pipe, but unless it was pure negligence on upkeep they ran tuning.


So you Think it's a possibility that they've flash the computer and there's some sort of tune in there


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SilverStreak88

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So you Think it's a possibility that they've flash the computer and there's some sort of tune in there


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When you run a tuner you are able to go back stock on most tuners so they could have set it back, but if they didn't and they didn't provide the tuner to you then you'll need a re-flash from the dealer.
 
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dmuney

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I'm not so sure on the melting because the cylinder wall is beat to gel it has deep craters and if you look at the picture with all the yellow markings the one line at the top of the cylinder it's like is the piston come up to TDC and was getting forced sideways. And then there's all the chunks of the ring in the oil pan I think those marks on the Pistons were from the rings getting beat out of it


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sbarron

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Looks to me like the piston got hot enough that the skirt got brittle. Caused by the detonation seen on the top of the piston (?). That type of temperature would also cause local lubrication failure which would likely cause the ring failure which also contributed to the damage. The dog started chasing it's own tail.
 
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dmuney

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Looks to me like the piston got hot enough that the skirt got brittle. Caused by the detonation seen on the top of the piston (?). That type of temperature would also cause local lubrication failure which would likely cause the ring failure which also contributed to the damage. The dog started chasing it's own tail.


Describe the detonation on the piston so I can understand what you see if you would please


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dmuney

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When you run a tuner you are able to go back stock on most tuners so they could have set it back, but if they didn't and they didn't provide the tuner to you then you'll need a re-flash from the dealer.


Anyway for me to find out if there's a tune in it ? I am an experienced auto & diesel Technition just new to the common rail


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SilverStreak88

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Anyway for me to find out if there's a tune in it ? I am an experienced auto & diesel Technition just new to the common rail


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Another tuner or dealer, if you hook up a Smarty, it'll tell you that foreign software was detected.
 
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dmuney

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Anyway for me to find out if there's a tune in it ? I am an experienced auto & diesel Technition just new to the common rail

I ask because before I change the piston it ran basically on five cylinders and never had a check engine light I had a check engine light one time when I drove through a puddle it was for an intake air temperature sensor so I cleared it and it has never came back on . I would've thought that running on five cylinders it would've given a misfire code or something the compression on number one before the piston change was only 200 pounds after about 450


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dmuney

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Looks to me like the piston got hot enough that the skirt got brittle. Caused by the detonation seen on the top of the piston (?). That type of temperature would also cause local lubrication failure which would likely cause the ring failure which also contributed to the damage. The dog started chasing it's own tail.


Are you talking about the small shiny specks ?


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sbarron

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I was referring to some of the scorching around the shoulder and across the rim.
 

sbarron

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On a CAT, (fishing boat-3208), I've seen the same damage, (though to be honest, with more damage to the piston top), caused by a bad injector. There wasn't much smoke until right before we decided to tear it down and examine, nor did we ever see any real differences in exhaust temps.
 

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Typically the marks in that pattern are due to a bad injector. and you probably got fuel running down the skirt and burning causing rings and such to get blown out and melting.... prob started small. Take a look at the injectors and or replace them. If you are running a tuner there is alot you need to support that extra fueling.

Not knowing all the details of your build or if its stock its hard to say exactly the cause but I would not just put it back together without looking at the injectors... and I always suggest if you change one change them all. its alot of money but just one of those things. also look at the wiring/valve cover gasket for damage. they are known to fail causing injector issues which can result in this...

Also do you have a EGT gauge. and I have a master manual to the 06-07 years on CD if you are interested in it I can email you. just PM me with your contact info.
 
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