Problem,
I'm getting a raw diesel smell through the AC, but only when I'm stoped or moving slow.
I took it in to the dealer, the said they couldn't find it. But he did spray something in the ducks to mask the smell for a few days. I can't find anything loose or anything wet on the engine, but the smell is still there.


Any idea's??

most likely not diesel itself but you are probably smelling the crankcase vented fumes, If ya look to the engine there is a clear plastic tube bout half an inch wide that hangs straight down. With the motor running and sitting still I get the same thing in my truck, most likely gonna run an extension to past the cab area of my truck to keep the fumes from entering the cab.

I was at a Cummin's Power booster meeting not long ago, and they said something about a filter for that tube.

Just out of curiosity what oil are you useing? I have heard of guy's useing rotella and getting an unpleasant odor from the oil then if they would change oils it would go away?

Factory Oil, it only have 1600 miles on it!

From the TDR web site

Cab Fumes - Dealer Solution Proposal

I experianced cab fumes when external HVAC is on. I also lacked plugs in the frame rails, taped instead from factory. At my first oil change (free from dealer!) I pointed out the missing frame rail plugs. The dealer ordered them and installed them - no charge.

I followed the discussion threads on fumes and absent plugs in the HVAC cowling and am guessing they may be related to absent plugs in the frame rails. If they ran out of one, they may have run out of both during assembly. The frame rails are externally apparent by looking underneath, the cowling requires disassembly to determine if present or not.

Here is what I did. I took my truck in on the transmission cooling line recall and explained to the service techician that I though the cowling plugs could be missing. I told him that I wanted them to remove the cowling and check for the plugs. If the plugs were there, I would pay the dealer the cost of removal and replacement. If the plugs were missing, then it is Chrysler's fault and they pay the dealer. The dealer/technician agreed.

The plugs were missing. They ordered plugs and will install them - Chrysler picks up the bill.

I had asked for the cowling parts description from their parts department. I combined that the pictures from: http://www.rounsevell.com/blowby.pdf . Both helped the technician, by demonstrating the part was supposed to be there according to assembly diagrams, and demonstrated pictorially where they were absent.

I will post results after the plugs are put in. I am interested in polling how many trucks, missing frame rail plugs, experiance cab fumes.Edited by: MALIBU

I saw this on the TDR also, what are the frame rails he is talking about?

If you look under your truck between the frame and your rocker panel. looking towards the rocker panel. You will see tape covering the holes. I found this when I installed my Maaps bars. The holes are not as big as the ones under the cowl. Hope this helps.

Can somebody take a picture of this? I think I remember seeing the tape under there, but I'm not sure if I'm thinking of the same place.

Lay down on your back, under the drivers door. Look between the frame and the door. there will be 2"x3" black tape on the under body. that is whet were talking about.

Does the tape face the ground, or does it face the frame?

It faces the frame

Well I'm going to put a longer hose on the pipe, if there is a pipe to put it on. I called Cummin's today and they told me my truck had the Carbon filter on it already.


He also said that, and I too. That if I smell Diesel, it's not coming from that vent pipe. Thats oil not diesel, and what my Non-smoking nose smells diesel.


I'm going to the do it yourself car wash today, and I'm going to wash the entire engine conpartment. Realy soap it down, then check it out again.

Do any of you have oil drop out of the vent tube described? I have 3900 miles on my truck and have some oil that I believe is coming from the vent tube that blows to the trans cover and has dropped onto my driveway. Is this normal? How much is normal if it is an accepted happening?


Thanks,


Bill

Well I did 2 things, one I went and washed the engine very good top to bottom. Then I call Cummins Northwest, to talk about the vent tube.


Well they told me what I already knew, there is a filter on the tube on the 04's and it returns the oil to the engine.


Besides, that's not the smell. The older trucks don't have this filter, but you can get it for them. Since I washed the engine I'm not getting the smell, now they did tell me that the water drain on the fuel filter can leak sometimes. Also if you just drain the filter on the frame you can get the smell too.


If I get the smell again, I'll check the filter drain tube. If thats not it, I'll take it to Cummins to check out..

Next to the A/C button is a button that shuts off outside air.. Puch that button also.. Now, Voila, no more smell in the truck!!!

Well sure!


But then I have to smell my feet all day instead!

Theres a gentlemen that goes by Scotty on www.dieseltruckresource.com (http://www.dieseltruckresource.com) that has a wealth of information on cab fumes. I believe he may have gotten fairly high up the ladder with this issue at DC. He is heavily involved with that Baja Bomber project. I'm sure all you cummins boys know exactly who I'm talking about anyway.

I have a new 2004 Dodge Cummins 2500 and after driving the first 25 miles I could smell "Raw Diesel" coming into the air system. To control the smell I have to select "recycle air". This happens every time I am stopped at a light or traffic. I took it back to the Dealer that same week and they said "they couldn’t smell anything would I go out with the technician and test drive?" I took the tech out and we both smelled it and he said, "It's because it is so new the engine needs to burn off the newness??" So much for competence! Anyway it now is 500 miles later and the smell is just as bad as day one. My buddy has 3 Cummins trucks and has put thousands of miles on them and has never smell "raw Diesel fumes" in the cab or any of his trucks? So are we seeing the begriming of a Cummins cover-up here or is this just a simple fix and the factory just screwed up on a few trucks?

Lessened the smell to almost nothing by switching to Delo oil. Rotella oil had a horrible, pungent smell for a couple of thousand miles after each oil change. Delo has a real faint odor for just a couple of hundred miles and then nothing after that.


Try it. It worked for me and might for you.

There seems to be a problem here. It seems that some people think that we are smelling engine oil!


That's not the case, I have a Wet Diesel smell! I have owned diesel trucks for 30 years. This is the first one to stink. Besides where are you going to smell engine oil, the 04.5 has a special filter on the down draft tube. And the oil smell is sucked back into the engine, I also took mine to the shop and they also told me it was just the film on the engine burning off.


This service guy didn't know his ass from a hole in the ground, I have a BE in Diesel Engineering. I was rebuilding 6 cyl. Union Diesels before he was born.


I have been pressure washing the entire engine once a week, and this seems to keep the smell down. And I have gone over the engine looking for anything that could be leaking. I even pluged up the Water seperator drain line.


But it sure isn't a Oil smell, I wish it was then it wouldn't stink so bad.

It could be a leaking high pressure pump.

Crawl under the front of your truck and look up at the drivers side of the engine just behind the harmonic balancer. You'll see a crank sensor and above that the high pressure pump. Look for signs of wetness. You can't see the leak from above.

http://home.comcast.net/~hoot74/dodge/accessable/images/DSCN5943.jpg

The plugs were missing. They ordered plugs and will install them - Chrysler picks up the bill.

I had asked for the cowling parts description from their parts department. I combined that the pictures from: http://www.rounsevell.com/blowby.pdf . Both helped the technician, by demonstrating the part was supposed to be there according to assembly diagrams, and demonstrated pictorially where they were absent.

I will post results after the plugs are put in. I am interested in polling how many trucks, missing frame rail plugs, experiance cab fumes.





Hey,


Did you ever get these in? What were the results? I'm sick of the horrible smells from the engine compartment getting in my truck, especially after oil changes.

I experianced cab fumes when external HVAC is on. I also lacked plugs in the frame rails, taped instead from factory. At my first oil change (free from dealer!) I pointed out the missing frame rail plugs. The dealer ordered them and installed them - no charge.



I'm missing the frame rail plugs. I asked the dealer about it and they said they were all this way. I checked a couple 2004 trucks on their lot and they were. Do you know what the part number is for the frame rail plugs since they can't seem to find it?


Thanks

Took some pictures of my truck and have a few observations and questions...


First of all -- Is this the blowby tube that everybody is talking about? I can see the mess and what the smell is. The dealer says that an oil additive should be added to reduce the smell. My argument is why the heck are engine compartment fumes coming in the cab? For the first 1000 miles or so after an oil change, the fumes are so strong that it makes me sick and my pregnant wife can't even stand to ride with me.http://www.cyber3dnet.com/truckpics/blowby2.jpg


Better view?
http://www.cyber3dnet.com/truckpics/blowby1.jpg


When I removed the cowling to inspect mine, I saw that the seal to the engine compartment had failed. I know that it wasn't due to my removal because of the dirt stuck to the adhesive:
http://www.cyber3dnet.com/truckpics/cowling_seal.jpg


Did the air freshener test (actually could only find Lysol, but it worked) through the engine compartment before I took anything apart and the fumes almost immediately entered the passenger compartment.


After removing the cowling, I found that both passenger side plugs were missing:
http://www.cyber3dnet.com/truckpics/hole_passenger_large.jpg


http://www.cyber3dnet.com/truckpics/hole_passenger_small.jpg


And same on the driver side:
http://www.cyber3dnet.com/truckpics/driver_hole_both.jpg


Also missing the frame rail plugs even though the dealer says they no longer distribute the truck with plugs and use tape on them all:
http://www.cyber3dnet.com/truckpics/frame_rail_driver.jpg


The dealer punched out some extras for me on the passenger side when the installed my Mopar side steps. It was nice of them to put new tape on when they

P/N 55276332AB For the frame rail plugs.

Okay so I now have 600 miles on my truck and the diesel/oil smell is worst then ever.. so I take it to another dealer. They keep it for a day and call to tell me everything is all right. Found no leaks all is OK and normal, for a diesel engine. However, they added a bottle of “Mopar Diesel Fresh” some kind of lemon oil freshener. Now I have”sweet lemon scented” diesel oil coming through my air system. Sounds like I’m making progress!? Is it just that the dealers don’t want to pull the cowling and plug up the holes {it's all warranty time billed} or are they just not aware there are missing plugs? http://www.dieselplace.com/forum/smileys/Disapprove.gif

Same smell coming from mine smells like diesel to me

MALIBU, did the plugs work? The last we heard was the dealer was going to install the cowling plugs. So what is the part number for the cowling plugs if P/N 55276332AB is for the frame rail plugs? How long did it take to get the parts? Is this the Chrysler Part Number?


Thanks..http://www.dieselplace.com/forum/smileys/Clap.gif

Just got my 05 on friday and i got that diesel smell also when at a stop or going REALLY slow. I havent looked at my frame rail or anything, but if that is the case, thats BS. does the frame rail tape work?

I have definitely noticed the odor http://www.dieselplace.com/forum/smileys/smiley18.gif....haven't checked for the plugs just yet, but the Rotella oil does seem to play a difference in the smell. I do know that my truck does have the filter on the hose...but I still get the smell. The smell does decrease when I wash the motor, but returns....until I have about 1000 miles on the oil change. I guess I will check for the plugs and/or tape for the holes, or find a way to plug the hole! http://www.dieselplace.com/forum/smileys/smiley4.gif

I only have the tape, not peeling yet though. I think I can find some soft rubber and a little RTV sealant and see how that works.... nothing beats that cost!!! $0.00