White staining on the hood insulation

[MRoberts]

Anyone else have white staining of the insulation on the underside of the hood? I've had this replaced once by the dealer, they said they have never seen it before. Now that it is back again, I can't believe Im the only one.

I'll try to get a picture of it in the morning.

Thanks

 

[SnoKing]

Our 2015 3500 is the same. White stuff on liner under the hood. brush it off or vacuum and it returns. SNOKING

 

[Hoefler]

Calcium from water under the hood. I have had it on all 4 of my Rams. From cleaning the engine compartment.

 

[SBettencourt]

The white powder is a fire retardant embedded in the insulation . I will need to look up the chemicql but i believe the initials are MAP.
In any event, water leaks around the edges of the washer nozzles and soaks the insulation. It is not the hoses leaking. There is a TSB. Easy fix is to remove the insulation and goop up the inside of the hood around the nozzles with silicone.
I posted details a few months ago on another forum but cant remember where. Will try to look it up.

 

[Bob4x4]

The customer may notice a white crystalized build up on the hoodsilencer pad. This build up is actually MAP: Mono Ammonium Hydrogen Phosphate, afire suppressant added to the hood silencer pad. MAP is easily dissolved in water.When the hood is saturated gravity may pull some of the MAP down onto the bottomsurface of the silencer pad where it crystalizes
This is not a tsb just info

 

[MRoberts]

Awesome. Thanks for the replies! The dealer I bought from had no idea and even changed it out once!

 

[Kirwin]

Water gets up between the hood liner and the hood from water running down the windshield. Especially on the passengers side, when it can't drain through the hole in cowl fast enough, it overflows under the hood and gets on top of the insulation there. It eventually soaks through and you get the white residue. If you drill out the hole a little larger, it drains faster, but it will still do it when you wash the truck or really heavy rain with the Passengers side down attitude of the truck. Ken Irwin

 

[trs31061]

I'm having the same problem. See below Bulletin from Chrysler that I got from a Ram Dealer.
















































































































































































































































































STAR Case S1623000012
Release Date: 02/23/1016

This document does not authorize warranty repairs. This communication documents a record of past experiences. STAR Center Online does not provide any conclusions about what is wrong with the vehicle. Rather, it captures all previous cases known that appear to be similar or related to the vehicle symptom / condition. You are the expert, and you are responsible for deciding on the appropriate course of action. Contact STAR Center, or your Technical Assistance Center Via ECCI or eCONTACT ticket if no solution is found FCA US LLC Version 4.1 01/13/2015

Case Number: S1623000012
Release Date: 02/23/1016
Symptom/Vehicle Issue: A White Build Up Exist On Under Hood Silencer Pad
Discussion: The customer may notice a white crystalized build up on the hood silencer pad. This build up is actually MAP: Mono Ammonium Hydrogen Phosphate, a fire suppressant added to the hood silencer pad. MAP is easily dissolved in water. When the hood is saturated gravity may pull some of the MAP down onto the bottom surface of the silencer pad where it crystalizes. STAR Case
This document does not authorize warranty repairs. This communication documents a record of past experiences. STAR Center Online does not provide any conclusions about what is wrong with the vehicle. Rather, it captures all previous cases known that appear to be similar or related to the vehicle symptom / condition. You are the expert, and you are responsible for deciding on the appropriate course of action. Contact STAR Center, or your Technical Assistance Center Via ECCI or eCONTACT ticket if no solution is found FCA US LLC Version 4.1 01/13/2015


The excessive chemical treatment seeping out of the hood pad does not affect its performance in any way.
To clean the silencer pad, simply use soap and water and wipe away with a towel.
Verification: After cleaning verify the white substance on the silencer pad no longer exist. If it does, environmental conditions should be considered such as road salt. Fluid leaks within the engine compartment should also be considered.

 

[trs31061]

STAR Case Number: S1623000012

This document does not authorize warranty repairs. This communication documents a record of past experiences. STAR Center Online does not provide any conclusions about what is wrong with the vehicle. Rather, it captures all previous cases known that appear to be similar or related to the vehicle symptom / condition. You are the expert, and you are responsible for deciding on the appropriate course of action. Contact STAR Center, or your Technical Assistance Center Via ECCI or eCONTACT ticket if no solution is found FCA US LLC Version 4.1 01/13/2015

Case Number: S1623000012
Release Date: 02/23/1016
Symptom/Vehicle Issue: A White Build Up Exist On Under Hood Silencer Pad
Discussion: The customer may notice a white crystalized build up on the hood silencer pad. This build up is actually MAP: Mono Ammonium Hydrogen Phosphate, a fire suppressant added to the hood silencer pad. MAP is easily dissolved in water. When the hood is saturated gravity may pull some of the MAP down onto the bottom surface of the silencer pad where it crystalizes. STAR Case
This document does not authorize warranty repairs. This communication documents a record of past experiences. STAR Center Online does not provide any conclusions about what is wrong with the vehicle. Rather, it captures all previous cases known that appear to be similar or related to the vehicle symptom / condition. You are the expert, and you are responsible for deciding on the appropriate course of action. Contact STAR Center, or your Technical Assistance Center Via ECCI or eCONTACT ticket if no solution is found FCA US LLC Version 4.1 01/13/2015


The excessive chemical treatment seeping out of the hood pad does not affect its performance in any way.
To clean the silencer pad, simply use soap and water and wipe away with a towel.
Verification: After cleaning verify the white substance on the silencer pad no longer exist. If it does, environmental conditions should be considered such as road salt. Fluid leaks within the engine compartment should also be considered.