2014 5500 major engine failure - Page 2 - Dodge Cummins Diesel Forum
4th Gen Cab & Chassis Discussion of performance, powertrain, and non-powertrain on Cab & Chassis Trucks....NO ADVERTISING

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post #13 of 25 (permalink) Old 12-11-2016, 11:47 AM
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Not sure what a pyro gauge wouldn't help ? If you keep egt under 1200 sustained towing it shouldnt melt piston. Cracked pistons sound like timing to me? Maybe tuned to much timing for a tow rig? Jmho


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post #14 of 25 (permalink) Old 12-11-2016, 12:08 PM
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post #15 of 25 (permalink) Old 02-10-2017, 11:15 AM
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post #16 of 25 (permalink) Old 03-19-2017, 10:12 AM
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Here to beat a dead horse, Did you ever get test results back on the injectors or find anything else about what caused a hole to be blown in the piston?
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post #17 of 25 (permalink) Old 03-19-2017, 07:39 PM
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Last week a good friend of mines truck had a major engine failure. Truck is a 2014 Ram 5500 with 168K on it. Ran perfectly up until this point. We fully deleted and tuned this truck with PPEI "kory willis" about a year ago just running his smallest 30hp economy tune. Im very confused about what happened here and so are many other mechanics Ive talked to. Anybody have any ideas? Thanks!
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post #18 of 25 (permalink) Old 03-22-2017, 09:05 AM
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Not sure what a pyro gauge wouldn't help ? If you keep egt under 1200 sustained towing it shouldnt melt piston. Cracked pistons sound like timing to me? Maybe tuned to much timing for a tow rig? Jmho


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These trucks run 1500 in stock form. Designed for it from the get go. 1200 was max temp for the 12 valve and early 24 valve engines that were prone to dropping exhaust valve seats under prolonged max egts. The factory programming will not allow EGTs high enough to do engine damage. Once molested all bets ar off.
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post #19 of 25 (permalink) Old 03-22-2017, 09:41 AM
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Not sure what a pyro gauge wouldn't help ? If you keep egt under 1200 sustained towing it shouldnt melt piston. Cracked pistons sound like timing to me? Maybe tuned to much timing for a tow rig? Jmho


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It's pretty easy to watch coolant temp if you don't have a pyro.


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post #20 of 25 (permalink) Old 03-27-2017, 09:39 AM
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With out a steel top piston crown i would not want to trust a carbon coating to 1500degrees sustained. Aluminum still melts below that, and only saving grace is the carbon build up on top. Its doesnt matter what engine if its got aluminum pistons it can still swell and scuff or melt a land or hole. Coolant does not catch up as fast as egt. Oil temp is better especially with oil cooled pistons. It changes very quick . I would still prefer pre turbo egt in my engine. You guys can do what you want.


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post #21 of 25 (permalink) Old 03-27-2017, 09:40 AM
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We never got an update on this guys engine any how ??? Any facts yet?


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post #22 of 25 (permalink) Old 03-29-2017, 08:29 AM
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Originally Posted by therabbittree View Post
Not sure what a pyro gauge wouldn't help ? If you keep egt under 1200 sustained towing it shouldnt melt piston. Cracked pistons sound like timing to me? Maybe tuned to much timing for a tow rig? Jmho


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This is normally the issue with deleted trucks. Guys delete and throw even the smallest tune on the engine which throws more fuel into it but never back the timing down and typical end result is HG or like the pics above.

I also run a small 30 hp tune but have backed my timing down 1 level and have been running strong for 200k now.

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post #23 of 25 (permalink) Old 03-29-2017, 07:05 PM
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With out a steel top piston crown i would not want to trust a carbon coating to 1500degrees sustained. Aluminum still melts below that, and only saving grace is the carbon build up on top. Its doesnt matter what engine if its got aluminum pistons it can still swell and scuff or melt a land or hole. Coolant does not catch up as fast as egt. Oil temp is better especially with oil cooled pistons. It changes very quick . I would still prefer pre turbo egt in my engine. You guys can do what you want.

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You do understand that a 1500F egt doesn't mean the piston crown reaches that temp, don't you?
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post #24 of 25 (permalink) Old 03-29-2017, 09:27 PM
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If the temp in the manifold , pre turbo is 1500 then the combustion gas temp is even higher in the chamber. The physical piston crown is exposed to that heat. It is oil cooled also but extreme temps can swell and melt the pistons. I've had my share of melted ring lands , pistons with holes in them and What not.... so i am not sure what the attitude is about? Like i said feel free the run your engine as you will . I prefer the not run temps sustained that high. Its just me and my wallet.


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