Howdy everyone, I recently hit 67,500 miles so the 'perform service' showed up on the overhead display of my 2007 Ram with 6.7L Cummins. I replaced the crankcase ventilation filter and reset the reminder. I had not paid any attention to the crankcase ventilation on this truck until now. Searching through this and other online forums, it seems the consensus is that 67,500 miles is much too long of an interval. Waiting this long allows engine oil to makes its way down to the turbo and eventually will foul the intercooler and piping. I'm wondering if this has happened to me? When I start the engine cold, there is a puff of blue smoke from the exhaust. I always assumed it was fuel, but maybe my entire intake downstream of the turbo is fouled with oil? Those with a 6.7L, have you ever cracked open your intercooler piping to see if it's oily in there? Should I pull off my intercooler and have a radiator shop clean it for me? I do intend to cap off the crankcase ventilation hose and add a breather filter so the problem doesn't get any worse. In case you're wondering, I have been running with no DPF/catalyst/EGR for almost three years.

 

um, you should have no oil in your intercooler or turbo from a crankcase vent.

air comes in via the turbo through the intercooler and into the engine....not out of the engine into the intercooler and then to the turbo...


so unless you have your crankcase vent hose hooked up to the intake of your turbo...you're fine...

if its oily in your turbo or intercooler, that is an oil seal in the turbo leaking...

 

Yes, my crankcase ventilation is stock, so the vent hose goes into the intake of the turbo. That's why I'm asking the question.

 

jeebus, how many retarded ideas did they incorporate into the 6.7L's ?!

If it was my truck, I would just route a hose from the CCV to the back of the engine and just let it drip on the ground...

Older ones like mine have the CCV on the timing case on the front of the motor and a hose that goes down the motor to a little puke bottle. nothing wrong with letting them vent to open air...that is all it is...a vent. and it fogs out oil mist at times.

 

CCV runs into the air intake.

Might have blown a turbo seal. In 67k I'm not sure much damage would be done by the factory filter not being changed.

 

Yes, the crankcase gases go into the air intake, about two inches upstream of the turbo. Once the CCV filter gets saturated with oil it's just a matter of time before the oil creeps downhill into the turbo and gets blown throughout. I would have changed my CCV filter years ago if I had known they load up with oil. When I changed mine the old filter weighed at least a pound more than the new one due to the oil in it.

I would love to know if somebody with a 6.7L has any experience with changing the CCV filter at the factory recommended interval and the resultant effects of oil on the intercooler.

 

The dealership parts department at the place I used to work for said they'd never sold a CCV filter, nor did they know what I was talking about when I replaced mine. That was in 2011.
I ended up capping the inlet and putting a vent filter on.

 

Be careful, if you simply bypass the hookup to the turbo there will be a code thrown. To eliminate this, I installed a custom baffled oil catch can to accumulate soot and any excess oil. The oil can be drained off an the soot can be washed off with wheel cleaner, no code and it is only 6psi

 

Nine year old thread......

 

I am going to try very short intervals to see how much accumulation there is, like 20,000 then 30,000...