blow by bottle

[FF1381]

Ok i ran the heater hose from my blow by to the back of truck... and the other day i noticed a little bit of smoke coming from the end of the hose, this may have been happening all along, but i just happened to be in an area where i can see it. .



this wasn't a significant amount of smoke, just a little bit. .



any ideas? or is this normal?



thanks

jason

 

[fj40charles]

Yes, this is normal. I get a little smoke when the motor is hot.



Charles

 

[dresslered]

Something is wrong if you just get a little smoke!



Mine ends at about the mid-transmission area and I often see quite a bit of smoke at a stop light. So much that I often think that it is the guy next to me.



Word of caution if you are running the hose all the way back. Be sure that the tube has no chance of clogging (due to oil pooling or severe cold weather) as I have heard stories of the tappet cover gasket blowing if there is no where to vent.

 

[Dane]

Jason,

Smoke from the hose is normal. I ran a hose all the way to the back inside the drivers side frame rail, exiting below the hitch. No problems in the last 1. 5 years. No more oil all over the engine and front axle either Make sure there isn't a droop in the hose anywhere that could collect oil over time and clog up the hose.

 

[FF1381]

thanks for all the help guys

 

[SnoKing]

Do not extend the hose that far in freezing weather. Condensation will freeze in the line and blow your engine oil seals. A short hose straight down is the only change that should be made. DC is coming out with a change to move the breather to the valve cover for those that go down very step hills and loose oil out the breather. SNOKING

 

[Bigsaint]

Ditto on Snow King's reply. If you live where it gets below freezing, simply run extend the hose down to the track bar and secure it right there. I added a 3/4" T fitting and have yet to see any accumulation of oil anywhere under the truck. All you need is to remove the vapor that exits from the area of the fan.



Scott W.

 

[Fireman Dave]

Yup, I'm with Snow King and Bigsaint.

 

[UKRugbyman77]

Yeah I was actually stopped one hot day on the interstate in construction. I had a couple of weenies sneering at my truck. Finally they hollered at me (with nose all twisted up. . ) "Yer truuucks smmmokin underneeth, theere's something WRONG with ittt. " Oh rolly... So I gets this big grin and sez, yeah, it's supposed to.

Guess you had to be there.

 

[dresslered]

I've received a few comments on my hose dangling down as well. Especially at the gas station, people are always saying that I have something disconnected. I just say to them that my truck's well hung.

 

[DEZLPWR]

Pardon my ignorance, but....

Isn't the "condensation" very oily or almost all oil, and therefore, wouldn't the freeze point be MUCH lower than water? Also, to block the line and blow seals, wouldn't there have to be an awful lot of fluid in the line? The only stuff that seems to come out the end of my line appears to be straight oil and a slight haze of smoke, so unless I'm planning a trip to the Arctic, I'm not worried about freezing.....

BTW, my line exits at the frame under the fuel tank.

Just my $. 02.

 

[dresslered]

I can't really comment on the condensation, but I would be concerned about "sludge" building up over the years with a loooong hose with very little incline. I have heard that it only takes about 2-psi to blow the tappet cover though.

 

[EricBu12]

I have mine hung down to the track-bar with heater hose. I want to have it removed and capped off and get that AIRSEP system that is a rebreather for the fumes. I would tap into the valve cover to do the siphoning of vapors an then it reburns it in the intake.



now I like smoke 'specialy out the tailpipe

But if you were to go down a steep hill like 23deg down then 2 quarts of oil will spill out the hose.



The airsep system is expensive but this will make it like any other Gas engine so we can rock crawl and not worry about the oil.



Any ideas on this? good idea?? Bad?

Thanks

 

[Riflesmith]

Eric,

The blow-by gases are composed of pretty cruddy stuff. Oily vapors, liquids and soot is NOT something I would pollute my entire intake system with. The efficiency of your intercooler would be reduced, compressor blades covered with junk, not to mention your IAT sensor as well.



I have mine piped into my tailpipe, just as it goes over the axle. I used 1" PVC to pipe it back there. With a 4" exhaust system, there is little pressure in the pipe at this point. The system works well, no mess, no fuss. No trouble with it at all. My humble $. 02.

 

[dresslered]

I'd have to go along with Riflesmith. In highschool we use to go to great lengths to convert our "closed breather systems" to an open breather design. Now that Father Cummins gave us this feature, people are spending lots of money to close it off again.

 

[PRout]

Originally posted by Riflesmith



I have mine piped into my tailpipe, just as it goes over the axle. I used 1" PVC to pipe it back there. With a 4" exhaust system, there is little pressure in the pipe at this point. The system works well, no mess, no fuss. No trouble with it at all. My humble $. 02.

Now this is what Ive also been thinking of trying, but was concerned about having too much pressure pushing back up into the system. How about the possibility of an explosion?



I just came back from a 4 wheeling trip, and the motor puked about a quart of oil out the front on a steep downhill, and the fan made sure it went everywhere. Need to solve that problem quick.



Are you guys running 3/4 inch hose with a barrell connector to extend the line?



How did you connect to the exhaust w/ the 1" pvc? Sounds like a good way to go.

 

[Riflesmith]

Shortshift,

Simply end your PVC header with a pipe thread fitting. Use a brass pipe threaded hose nipple to adapt to large diameter heater hose. Have a 3/4"NPT elbow welded onto your tailpipe where it goes over the axle(with matching size hole in tailpipe,of course). Use another hose nipple threaded into the welded elbow and you're done. Heat from the exhaust pipe has not had any effect on the hose this far back.



With the engine at a fast idle, place your hand over the oil fill opening before making the mod and after. I could detect no difference in pressure. I have had no problems with seal leaks. I think this has solved the blow-by mess issue for me.

 

[Skyjacked Ram]

Just a thought,

being originally from Alaska, I personally like the thought of having an oily underside just for the simple fact that the oil keeps the underside from rottin away with all the crap ie... salt, calcium chloride etc... just my opinion and most likely nothing more than a redneck form of undercoating

 

[EricBu12]

The AIRSEP system has a way to separate the oily mess from the reg vapors. all I wanted to do was change the place that the vapors were picked up from. I would also like maybe to make a blow by hose from the valve cover and then down so that again, when going down a steep hill, the oil will not puke out the hose when 4-wheelin'



Shortshift,

You saw what happened when you went downhill, the truck went down but the oil stayed level, right up to the opening to the hose. If that was capped off and a vent opened up like back by the rear of the valve cover and dropped down and be open like it is now, I think that would be tha good solution. I also think that the fumes would be a little less oily being at the top of the engine instead of half-way up the front.....

What do you think



Eric