Cummins white smoke when cold started

Tiny
NATE8666
  • MEMBER
  • 2011 DODGE TRUCK
  • 30,000 MILES
My truck smoke for about 10 to 15 mins when first started in the mornin after sitting all night. The dealer has been working on it for over 2 month now they have replaced the head gasket, injectors, head, piston rings and one piston cylender 6 whitch appears to be the one missfiring. When 6 capped of does not smoke. Has dpf delete and airdog 2 was installed at 15000 km had no probems till one cold morning. They have no clue and would like some insight into this thanks.
Friday, May 25th, 2012 AT 12:10 AM

4 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
White smoke emmiting from your exhaust it usually caused by one of the following:

* Engine Compression low

* Water contamination in your diesel fuel

* Pump Timing or Engine Timing out

* Fuel starvation to the pump causing your fuel pumps timing to operate incorrectly
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Friday, May 25th, 2012 AT 3:43 AM
Tiny
NATE8666
  • MEMBER
  • 3 POSTS
The compression is 260 on 1 and 6 300 on rest dealer said that was still within spec. Fresh diesel has been used also. They tell me the timing is unajustable and could not be the cause. They also have done fuel pressure test 26 and tested return line said all checked out. Could it be possibe while it sits overnight it looses it diesel in lines from tank to cp3. Then when cold started does not have anough pressure or diesel to start properly. They have told me this also could not be the problem.
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Sunday, May 27th, 2012 AT 3:03 AM
Tiny
NATE8666
  • MEMBER
  • 3 POSTS
Ok thanks
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Monday, May 28th, 2012 AT 3:09 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
White smoke is normally caused by heating problems-such as glow plugs or its control module. Diesel with an engine temperature below about 80 F. Will produce some white smoke during the first few seconds after startup-Other causes of white smoke:

Burnt glow plugs
Incorrect Ignition timing
Compression problems - If a cylinder has significantly lower compression pressure than others. Minimum compression pressure should be 275 psi at cranking speed.
Blown Head Gasket
Poorly sealed piston rings
Leaky valves
Cracked Head
Cracked Block
Injector is stuck or not working
Clogged air filter
Defective waste gate such as an actuator, vacuum line etc.
Poor fuel quality
Low coolant temperature
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Wednesday, July 11th, 2012 AT 12:06 AM

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