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Clacking noise after engine is shutdown.

Gray Ghost

Gray Ghost

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My engine makes a slow clacking noise for a few seconds after the engine shuts off. Is this normal?
 
If we are talking about the same noise, mine does it too. I think it's the DEF pump purging the lines, but not sure.
 
The turbo continues to be oiled after shut down? What pumps the oil? QUOTE="Daybreak, post: 9277, member: 225"]
Howdy,

Oiling the turbo
[/QUOTE]
 
That doesn’t pass the sniff test
 
The noise is most likely the DEF dosing module purging DEF. I hear the noise regularly immediately after I have turned off the truck.

Here is the relevant excerpt from page 144 of the user's manual:

"Diesel equipped vehicles also have an exhaust after-treatment system to reduce emissions utilizing a DPF (refer to “Odor” in this section for further information) and a Selective Reduction Catalyst (SCR). The SCR reduces Nitrogen Oxides (NOx) using the Diesel Exhaust Fluid (DEF) system. DEF is injected directly into the SCR through a dosing module. This process will create a clicking sound and at times, will make noise even with the vehicle shut off. This is normal as the DEF dosing module is purging DEF. "
 
From the manual: "Diesel equipped vehicles also have an exhaust aftertreatment system to reduce emissions utilizing a DPF and a Selective Reduction Catalyst (SCR). The SCR reduces Nox using the Diesel Exhaust Fluid (DEF) system. DEF is injected directly into the SCR through an dosing module. This process will create a clicking sound and at times, will make noise even with the vehicle shut off. This is normal as the DEF dosing module is purging DEF."
 
Burn'n Oil said:
From the manual: "Diesel equipped vehicles also have an exhaust aftertreatment system to reduce emissions utilizing a DPF and a Selective Reduction Catalyst (SCR). The SCR reduces Nox using the Diesel Exhaust Fluid (DEF) system. DEF is injected directly into the SCR through an dosing module. This process will create a clicking sound and at times, will make noise even with the vehicle shut off. This is normal as the DEF dosing module is purging DEF."
Click to expand...

Are you mocking me? ;)
 
What about while your driving and hear this noise? Mine makes it at stop lights if I idle for 3-5 seconds. I hear “click.. click” then it goes away but does it every time I drive and come to a stop
 
The EGR valves cycle when the truck is shut off, making a clicking sound. By cycling the valves it stops carbon from fouling them.
 
Gswain said:
The EGR valves cycle when the truck is shut off, making a clicking sound. By cycling the valves it stops carbon from fouling them.
Click to expand...
Does know one read? Mine is doing it when my truck is operating…literally come to a stop light. Sit there for more than 5 seconds and I get the “click.. click” it only clicks twice….
 
fjcanepa07 said:
Does know one read? Mine is doing it when my truck is operating…literally come to a stop light. Sit there for more than 5 seconds and I get the “click.. click” it only clicks twice….
Click to expand...
I was addressing the first post. Probably def related but I don't have firsthand knowledge of your situation.
 
Gswain said:
I was addressing the first post. Probably def related but I don't have firsthand knowledge of your situation.
Click to expand...
Yeah no one seems to know. Even the dealer ship as of now says it’s an “audible” relay.. I’m calling bulshit
 
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