Hello All. I Have A 2002 F250 With Some Mods Already. Scmt , Intake , Exaust , Gauges. I Have Notice When Reading Thru The Forums That Many Of You Have Done The Ccv Mod. I Understand This Involves Redirecting The Crankcase Vent Tube Into The Air Instead Of Into The Intake. My Question Is....... What Is The Purpose Of Doing This......what Benefit Is It............does It Make More Power.........and Don't The Oil Vapors Help To "lube" The Turbo? Must Be Something Good About Doing This Because So Many Do It.

 

In general, it keeps the oil out of the intercooler where it will leak from the boots and cause a mess. But I also found that it greatly reduced the oil consumption of my truck. Previously, it was using about a quart of oil ever 2,000 miles, and since the mod it has used less then 1/2 quart in 6,000 miles (yeh, it is time to change oil again). Somehow it was drawing a considerable amount of oil out of the engine and burning it, and with the mod this has stopped.

 

No, you will not lose any "lubing" of the turbo by doing this. The turbo has sealed bearings, no need to ever worry about to "dry" of an air charge going into it.

Main reasons for the mod. keep the oily residue off of the intercooler boots, and intake boots. also once you see the stuff that comes out of it you will wonder how any motor can make HP with the nasty looking mist that comes out of it.

main reason it goes into the intake, emisions. so if you have to do smog checks or any thing like that, I would find out if it is legal, or you may have to change it every time you do a smog check.


Diesel Rod

 

Is there a good write up with pictures and stuff explaining how to do this mod, i'd like to give it a shot.

 

I would also like to know how to do this mod, I have searched to no prevail.

 

I have a few pics in my webshots page.

here is the '96's engine you can see the hose. http://community.webshots.com/photo/344525237/344528267TdViWY

here is a pic of the '97's engine, you can see my DIY intake, and the hose over the brake booster is barely visible. http://community.webshots.com/photo/306472238/306574455eGtEWG


Basicaly you have to take the metal or plastic piece out of the intake system, replace it with a piece of pipe, or a PVC coupler and some PVC works too. 4"-3.5". you can, but dont have to pull the lil CCV cover off the valve cover and turn it around, so teh outlet now faces the firewall. the '97 is turned around, the '96 isn't. get some 3/4 in hose, heater hose is recomended, I just used cheap clear hose from menards. run it to where ever you want. '97 is all the way to the back bumper. the '96 is right under the drivers door. my buddy kept the piece in the intake, made a lil cover where the CCV used to go into the intake.

sorry such a bad explination. pics help alot though. mine aren't the best but they should get you started in the right direction.


Diesel Rod

 

You know that plastic section halfway in between the air filter and the turbo?
That's where the vapors are vented into the engine. What you need to do is to remove that from the engine. You'll find that there is a small rubber elbow between the bottom of the plastic piece and the driver's side valve cover. Save that elbow, you'll need it. Remove the plastic piece from the engine and examine it. You'll find a "periscope" looking thing sticking up in the middle with a hole going down to the flange that the elbow was on. Saw that periscope off to remove the obstruction of airflow to the turbo. Now figure a way to block the hole so that no dirt get's into the turbo. I used a NPT fitting. The tap for the threads fit perfectly in the hole so I just cut some threads and ran a fitting in. If you don't have the tap, and alternate idea is to completely degrease the thing, make a cup out of aluminum foil and fit it onto the bottom of the fitting. Go to NAPA and get some of their 5 minute epoxy, mix some up and fill the hole. 5 minutes later you can remove the foil. Or use an old rag several layers deep over the hole and secure it with a hose clamp. Some air will get through that way but it's no big, the multilayered rag will filter it ok. Go to your parts store and get some oil resistant hose, a fitting that will fit inside that elbow you saved, some zip ties, and construct a vent pipe that leads away from the engine. Taking care not to get too close to the exhaust manifold. At least 5 inches is what I figured. If you want to be extra careful about heat, get some header wrap and use it. Just run the hose down to a point just below the frame of the truck and zip tie in place. Once it's done you will notice that a fair amount of smoke comes out of it at all times. Don't worry, it's normal.
Sorry no pictures, I did mine a long time ago.

 

Beat me to it 444dieselrod. Good work and with pictures!

 

But your explaination is alot better then mine. I was about ready to crash into bed for the nite, hurried and tired.


Diesel Rod

 

If you don't want to cut up the CCV vent, the periscope as Kwik put it, then a 3.5" long section of 4" exhuast pipe will replace the whole plastic vent piece. When I made my Tymar type setup, I just ran 4" tubing all the way back to where the CCV would end and slid it into the last section of plastic intake tubing before the turbo.