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  #97  
Old 05-12-2014, 02:50 PM
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Re: Vulnerable DEF injector wiring!

I can't believe water from a mud puddle breaks the injector. I mean it's vulnerable, but not THAT vulnerable. I would sooner think, like Willx, that something else caused the damage, and the water triggered the light. Seems much more plausible.

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  #98  
Old 05-12-2014, 02:52 PM
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Re: Vulnerable DEF injector wiring!

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Originally Posted by Zhe Wiz View Post
I can't believe water from a mud puddle breaks the injector. I mean it's vulnerable, but not THAT vulnerable. I would sooner think, like Willx, that something else caused the damage, and the water triggered the light. Seems much more plausible.
Once a wire is nicked, a little flex back and forth and they break off pretty easy. That and the drag of the water would help finish it. (theory only).
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  #99  
Old 05-12-2014, 03:13 PM
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Vulnerable DEF injector wiring!

Wait, so whats exactly breaking off? The line for the def/def injector? Or an electrical signal wire? Or all ?

But i think i will just add something there to help defuse the water a little
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  #100  
Old 05-12-2014, 03:36 PM
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Re: Vulnerable DEF injector wiring!

I think that the injector shearing off would be caused by hitting water at high speed, and thus the water hitting the injector at high speed. Forcing the water through a number of small slats (in the skid plate) should slow it down enough to reduce most of the damage potential. In theory.

If you think a vertical baffle/deflector would be best, that's cool, but I would just like to caution against adding too much material in there, because we don't want to interfere with heat dissipation from the DPF.
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  #101  
Old 05-12-2014, 03:42 PM
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Re: Vulnerable DEF injector wiring!

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Originally Posted by Rumline View Post
I think that the injector shearing off would be caused by hitting water at high speed, and thus the water hitting the injector at high speed. Forcing the water through a number of small slats (in the skid plate) should slow it down enough to reduce most of the damage potential. In theory.

If you think a vertical baffle/deflector would be best, that's cool, but I would just like to caution against adding too much material in there, because we don't want to interfere with heat dissipation from the DPF.
There's also the possibility of heat buildup in the DEF injector area. Have you seen the silver heat-shield covering the injector connectors? This is there for a reason. I hope our plate will not cause heat buildup that will fry the injector.
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  #102  
Old 05-12-2014, 03:48 PM
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Re: Vulnerable DEF injector wiring!

The way i hav it now allows basically as much air flow as not having the plate.

I was thinkn mayb ill put a threaded hole in front of where the injector is at it , and use a fat bolt in its path to defuse the water. Idk. Jus a thought
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  #103  
Old 05-12-2014, 03:58 PM
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Re: Vulnerable DEF injector wiring!

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Originally Posted by dom42 View Post
Wait, so whats exactly breaking off? The line for the def/def injector? Or an electrical signal wire? Or all ?

But i think i will just add something there to help defuse the water a little
I have seen no photo proof of disconnect with water but I have seen a vehicle with a damaged wire that DID NOT error prior to being in water. It did not look like the water did the damage. BUT I never say never and look at it with an open mind because you are engineering something and asking "What If" is important.
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  #104  
Old 05-12-2014, 04:04 PM
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Re: Vulnerable DEF injector wiring!

Yup. Got u !! Ill b going back to shop to make a more refined version .

Im a SEMA member and actually am partnering up with my metal guy (SEMA member as well) in near future. We will b able to get the CAD files for the grand cherokee and basically make anything all cnc'd so everything is basically like how the factory would do it only i would use better material. Should b fun !!
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  #105  
Old 05-12-2014, 05:20 PM
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Re: Vulnerable DEF injector wiring!

I would think that bending a tab up from the plate so it is in front of the injector and between it and the DPF would offer protection. That would deflect radiated heat and block hydraulic force from water.

The slots in the current design could be made very narrow and bent inward to created slanted vents that would prevent water and debris from intruding with force. Similar to sheet metal vents in an air conditioner.
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  #106  
Old 05-12-2014, 05:30 PM
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Vulnerable DEF injector wiring!

Yeah im looking at all possibilities with out it costing so damn much.

But as far as the vents in the current version , they are waaay in front of where the injector is at. If u look at the video. The injector is located towards the back of the plate where there is no vents. Basically the same distance back as bolt on side of frame.

I did it that way so that air can flow thru them to help keep cool and what not , but if a big splash did come up in that area it would somewhat defuse it.

But now im thinkn about if i plow thru deep water and it is completely submerge that the force of the water being pulled around the injector may b strong enough to break it. Idk but may adding something there would help. I dont think it can hurt
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  #107  
Old 05-12-2014, 06:54 PM
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Re: Vulnerable DEF injector wiring!

If you look under the vehicle, the def wiring is is routed under the frame, and hangs down so it can be snagged by road hazards or anything kicked up by the right front tire, running off road, thru brush or deep snow will snag the def wiring too. Something needs to be made to cover or shield the wiring so the the def wiring is protected

I can' t believe that Chrysler feels that this eco-diesel is trail rated?

My vehicle is an overland model with the off road II package and the optional skid plates don't cover this area at all.
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  #108  
Old 05-12-2014, 06:57 PM
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Re: Vulnerable DEF injector wiring!

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Originally Posted by bcampion View Post
If you look under the vehicle, the def wiring is is routed under the frame, and hangs down so it can be snagged by road hazards or anything kicked up by the right front tire, running off road, thru brush or deep snow will snag the def wiring too. Something needs to be made to cover or shield the wiring so the the def wiring is protected



I can' t believe that Chrysler feels that this eco-diesel is trail rated?



My vehicle is an overland model with the off road II package and the optional skid plates don't cover this area at all.

The plate i made basically covers that area of the def line u are talking about. Im designing some rock sliders that will incorporate a skid plate to protect the line all the way to the back tire.
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