I finally got around to relocating my crank case vent 0n my 98.5 the other day and I just wanted to say that it was well worth the effort. I don't have any oil smell in the cab anymore and no more mess down the front of the motor ............Since I relocated the vent to just in front of the tranny cross member on the drivers side, I do smell some oil fumes when I stand beside the truck while it is idling but I can probably live with that.

I used some galvanized rigid EMT conduit tubing and used a conduit bender to make the tube snake between the motor and the frame and out to the cross member. I fastened the tube to the frame with EMT hold down clamps. I connected the original rubber vent hose to the EMT with a 1/2" pipe elbow and liquid-tight EMT compression fittings........I also reused the catch bottle at the other end and I connectted it to the EMT with another compression fitting. It fits very well and looks quite tidy but I have myself second guessing on whether or not I should have moved the vent back further..........so, for those who have relocated their crankcase vents, how far back did you move it?

 

I stopped about 2' short of the rear axle with clear plastic tubing. Put a downspout on it but it still "spots" the rear axle, drive shaft & differential.

When I get around to it...going to try Infidels solution. Just let it hang straight down to a foot or so below the frame. Think he said this stops splashes and undercoating...not positive. Bill?

RJ

 

I have mine just pointing straight down. It ends at the bottom of the oil pan. Makes the under carriage a little messy, but I consider it a rust inhibitor.

 

i relocated mine into my exhaust pipe using the crankcase evacuation system by mr gasket from summit

 

I usually just extend the tube straight down. I think the greatest importance is just getting it out of the fan shroud area. In this climate I would worry about it freezing up if it was too long or horizontal.

 

Mine goes straight down, about 2" past and zip-tied to the sway bar. I dont have a concrete or asphalt driveway ( all sand and clay) so I don't know about spotting, but the under carraige is clean (no oil).

 

Be careful how long the horizontal run is for the tubing you extend.

I learned the hard way in cold climate that it will freeze up, kill the mileage and push oil past the seals.

What a mess. However, I think I may have caught it in good time as the oil consumption was a liter of oil every 200 kilometers and now with the hose cut shorter, no oil usage in over 500 KMS. I still have to do some heavy towing to make sure its all good. The dealer has me doing a log on the consumption.

 

My vent tube is pointing at a downward angle that varies through out the length of it - there is no exactly horizontal spots.........will I still have a freezing problem with even a slight downward angle?

I like the idea of the crank case evacuation set up except for when it comes to emissions testing time........

 

About a week ago, I cut about an inch off the factory tube, put on a 90 degree angle barbed connector and ran 3/4" heater hose along side the frame to just behind the rear bolt of the control arm. The hose does go horizontal as it goes over the front cross member but when the the engine is running, I can feel warm air and see steam comming from the end of the tube. I hope I'm Ok with the way I have it set up?

 

I just get a piece of 3/4" id hose and push it over the stock blowby, let it a hang about six inches off the ground, no clamps so it can come off if it ever gets caught on anything. Paints the pavement, not the truck.

Be careful, I've known a couple of people who have blown seals when moisture that collected in low spots froze in long lines. Moisture condenses on the inside of the hose along most of the length while running then runs back down to a low spot to freeze when you shut down. Don't know how you could move the hose very far back towards the rear without creating a low spot. I wouldn't recommend it unless you live where it doesn't freeze.

 

My breather extension was on an angle but not enough I guess.
I had a icicle 5 inches long on the end of the hose. Some air was passing by and I think that was the saving grace on my seals.

What amazed me is when I shut off the truck and it took a few minutes to get the tools and get underneath the truck, when I cut the hose, it blew off like a firecracker! This also indicated to me that the seals where holding. If I had cut the hose and no pressure was there, I bet I would be tearing down the engine.

I know this is not the cuplrit with the exhaust gas fume issue I have had so I am going to have it hang down straight.

We think we found my reason for the fumes in the cab on defrost at lights and while idling.
the body plugs.

 

Not sure what I'll do now. I think I might cut the hose back so it empties down by the axle. When it was stock, it was emptying all over the front of the motor. I'll check it out later today.

 

I know the feeling........now Scotty has me worried about the freezing issue ........the motor stays clean and dry now but it won't for long if it starts blowing out seals .............there is something to be said about the piece of mind of not having to worry about the vent freezing up!..........sheesh, here I am all impressed with my nice tube fitting job and now I might pull it out!

 

I was impressed with my job too until now. Thanks Scotty!