Would a PCV system gone awry cause the smoke? Maybe a bad pcv valve on one of the valve covers is allowing too much crankcase air to be pulled into the intake manifold?
Printable View
Would a PCV system gone awry cause the smoke? Maybe a bad pcv valve on one of the valve covers is allowing too much crankcase air to be pulled into the intake manifold?
As JK mentioned, the smoke is now extremely heavy, with the engine hot and at idle. I see nothing once I'm up to traveling speed. Oil pressure appears normal. I've purchased the injectors and new feed tubes. That job will be starting soon.
As for the oil consumption, I may be all wet on this one and caused a false alarm-
According to one of the dealership techs, the proper method for checking the oil is to get the engine up to temperature, shut the engine off and allow it to sit for 5 minutes- THEN check the oil. Usually, I had been checking the oil using this method or, cold before starting the engine in the morning. For whatever reason, I recently changed the method I had been using, by starting the engine "cold" in the morning (to get the oil pressure up), allowing it to run for a minute or two, and then checking the oil. If the tech is correct, I've just created a false reading! My bad- probably have been over filling it lately.
I'll check the oil level using the method recommended by the tech for the next few weeks to see if there is any further loss noted. Sorry if I wasted your time!
I use the cold level check method. Temp not a huge concern so long as it has had adequate time for the oil to drain to pan.
With the engine "cold", I can clearly see that my oil level is well above the limit and will have to have some drained after I'm done with the injector replacement.
I am noticing that the tips of my injectors are heavily caked with carbon. DMaxMav stated that I shouldn't be getting oil into the cylinders as they are pressurized by the turbo. So, then am I to believe they are that carboned from the fuel seeping past the needle/seat? Being that the injector tips are highly carboned, I'm wondering if my valves are experiencing the same buildup? (Just had the heads rebuilt a few months back with the head gasket change).
I've read on several web sites that Cefoam will help dissolve carbon buildup- so I'm wondering if it would help any if I dumped a can into the fuel once I get this truck back up and running? Or, perhaps som FPPF would help remove any carbon deposits?
Anyone with any experiences/observations on this?
I wouldn't expect any buildup on the intake valves as they are dry flow, and the exhaust valves generally run hot enough to remain clean.
Combustion efficiency could help the carbon as well as working the truck a bit. Regular use of FPPF should help-to a point.
I think the simplest solution is to start fresh with the injectors/lines and drive it.
Been a while since I last visited the site- just an update:
The injectors were the problem. Despite the acceptable PW commands and balance rates, the smoke was indeed injectors- must have been seeping as JK suggested. I replaced them myself this time (with new pipes) and saved some $$$- no more smoke. Disassembly/reassembly not too big of an issue (about 8 hours each way)- but PITA when the dealership tech rounds out the cap screws on the valve covers to the point where vice grips are needed!!!
Not seeing a big issue with oil consumption either- false alarm on that one. No coolant/water/fuel in the oil based on lab test.
Still have a "ticking" noise from the right-hand side of the engine- and an exhaust leak around the down pipe to exit pipe connection. Flange of the down pipe is heavily eroded. Sealers and other such junk won't cure it and the erosion is too big to let soot build up plug it. Living with it.
Thanks for the help guys!