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Old 09-23-2009, 11:23 AM   #1 (permalink)
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clicking in engine, white smoke

First the background
I'm here at Texas Tech, my mom has the truck back home. I can't get back to work on it and I'm not sure what's wrong with it so I'm comin to you guys
this is the email she sent:

2004 Dodge Ram 2500 with Cummins Turbo Diesel. 6-speed manual.
122,000 miles.

Has started running/idling very rough. Clattering noise from engine.
Lots of white exhaust at start-up and after warm-up.
May or may not be related: with accelerator engaged, oil pressure
gauge indicates 40 psi. Same at start-up. However, after warm-up,
and at idle in neutral, oil pressure drops to around 20 psi, sometimes
lower.

Now I've driven it also. Usually it puts out some blue smoke at start up for a few seconds. I figured it was just cause of the cat. converter. It's never a lot and not for long. I've never seen the white smoke. She said it's a lot sometimes and sometimes just barely a haze.
As for the "clattering", I've heard it once before. sounded MAYBE coming from the 4th cylinder but idk. It was definitely in the engine because it was perfectly in sync with it. Did it to me one time in Wal Mart parking lot. Turned it off, came out to it, started it, same thing. Then after i turned if off again it was fine.
I'm also assuming the oil pressure thing is fine because I've always noticed it like that.
Kinda urgent cause she's driving this cause her Explorer's A/C isn't blowing. And besides, it's a diesel, standard, and gets better gas mileage haha.
So watcha think guys?
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Old 09-23-2009, 11:41 AM   #2 (permalink)
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I just posted about a similar problem with my 04. don't have the white smoke, but definatly an audible knock. I'm checking my injectors; I've been told they are prone to failure on these cr motors. BTW, are you running any kind of tuner?
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Old 09-23-2009, 11:44 AM   #3 (permalink)
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Sounds like injectors. Don't run it anymore! You might have already damaged the motor.
Check oil level and smell for diesel.
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Old 09-23-2009, 11:47 AM   #4 (permalink)
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injectors leaking down, however you saw blue smoke indicates oil in the exhaust, check the oil see if it smells like diesel, see if its thinned out?, also whats the level on the dipstick? did it make any oil? also check the seal in the turbo, may have lost a seal there, causing oil to leak into the exhaust causing the bluish colored smoke also.
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Old 09-23-2009, 11:58 AM   #5 (permalink)
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Quote:
Originally Posted by jesilvas View Post
First the background
I'm here at Texas Tech, my mom has the truck back home. I can't get back to work on it and I'm not sure what's wrong with it so I'm comin to you guys
this is the email she sent:

2004 Dodge Ram 2500 with Cummins Turbo Diesel. 6-speed manual.
122,000 miles.

Has started running/idling very rough. Clattering noise from engine.
Lots of white exhaust at start-up and after warm-up.
May or may not be related: with accelerator engaged, oil pressure
gauge indicates 40 psi. Same at start-up. However, after warm-up,
and at idle in neutral, oil pressure drops to around 20 psi, sometimes
lower.

Now I've driven it also. Usually it puts out some blue smoke at start up for a few seconds. I figured it was just cause of the cat. converter. It's never a lot and not for long. I've never seen the white smoke. She said it's a lot sometimes and sometimes just barely a haze.
As for the "clattering", I've heard it once before. sounded MAYBE coming from the 4th cylinder but idk. It was definitely in the engine because it was perfectly in sync with it. Did it to me one time in Wal Mart parking lot. Turned it off, came out to it, started it, same thing. Then after i turned if off again it was fine.
I'm also assuming the oil pressure thing is fine because I've always noticed it like that.
Kinda urgent cause she's driving this cause her Explorer's A/C isn't blowing. And besides, it's a diesel, standard, and gets better gas mileage haha.
So watcha think guys?
Probably dropped a valve seat, if you want I can send you the sound that my truck made when this happened. I'll have to look for that file though...
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Old 09-23-2009, 06:15 PM   #6 (permalink)
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ok well i got a ford and i know the HEUI injectors but not about these.
i forgot to mention that it was "leaking oil" according to the driver. she said it was a quart low, then added some. she's been checking it and it's been ok. idk about the fuel in it.

again, i don't know cummins. just international.
how do you check the seal for the turbo?
how to check injectors? how to check valve seat?
haha sorry i just don't know anything
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Old 09-24-2009, 03:31 PM   #7 (permalink)
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bump up
anything?
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Old 09-24-2009, 04:29 PM   #8 (permalink)
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exhaust smell like diesel? does it sound like it is running on 5 cylinders? Just had an 03 show up at the shop bone stock with 1/2 of a valve seat missing. Have someone to a temp check on the manifold and see if you have a cold cylinder good indication of a valve problem
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Old 09-28-2009, 09:35 AM   #9 (permalink)
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so basically i've got a bad valve seat or bad injector?
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Old 09-28-2009, 02:53 PM   #10 (permalink)
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Pull out your dipstick and smell the end of it. If it smells like diesel you have a bad injector.
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Old 10-12-2009, 02:26 PM   #11 (permalink)
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ok got the truck back today
it runs rough at low RPMs. the RPMs at idle don't stay steady. they go a little below 750 then a little above. and so on.
currently i have the valve cover off.
Can i disconnect one injector at a time and then fire it up with the VC off? or do i have to put it back on?
And is that an ok way to see which injector is bad?
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Old 10-12-2009, 03:55 PM   #12 (permalink)
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ok never mind. does anyone know any good diesel shops in and around ft worth?
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