Engine/Transmission (1994 - 1998) engine oil vent

[RBratby]

i have a question about the oil breather tube. i have a bunch of little breathers for valve covers sitting in the shop. could i take the tube off and put a breather on the tops of each valve cover? i would like to try to keep the oil off the driveway and the front driveshaft. if i cant do the above what do i have to do to make the tube longer? thanks for the help.

 

[Swayse]

I'm gonna plumb my blow by into my exhaust, don't know if it'll work, but I'm gonna try it. I'm going in at an angle, so it should kinda suck the blow by into the exhaust. I'm gonna take out my dip stick and put a vac/pressure guage in there to see what happens at max boost.

 

[Rman]

I'm gonna plumb my blow by into my exhaust, don't know if it'll work, but I'm gonna try it. I'm going in at an angle, so it should kinda suck the blow by into the exhaust. I'm gonna take out my dip stick and put a vac/pressure guage in there to see what happens at max boost.

Did this ever work out? I'm thinking of doing it with mine.

 

[ABorchard]

Take my advice from experience, if you plumb the blowby into the exhaust you must use a check (one way) valve at the exhaust pipe. No matter what angle the blowby enters the exhaust there are certain situations where back pressure will blow the dip stick out along with a bunch of oil. If it wasn't allowed to vent out the dipstick it would probably blow out gaskets.

 

[RVPILOT]

vent tube

Check with Walker engineering of Sun Valley Ca. they sell a system called airsep,eliminates the problem of oil vapors out the tube by recylcling oil and vapors back thru the intake. expensive but helps eliminate oil leaks in high milers by creating a vaccume in crankcase. stormy

 

[K5IP]

Or, just slip a small bottle (I use a small juce can) over the tube and empty it at every oil change. Simple, but it works

 

[MLee]

Heres what I did, Went to the hardware store PVC dept, picked up a 3/4 x 1 x 3/4 "T" with a 3/4 to 1/2" slip to thread and a 1/2 threaded plug. This will contain your drip and will allow the crank case to breath. Remove the plug to drain the accumulated drips when you change your oil. If you want, you can pick up some tubing and a reducer and extend the tubing to the rear to eliminate the fumes and oil coating. It is held in place by a wire and attached to one of the bolts close by on the bell housing. And it does hang straight down. Picture looks as though it is sideways.

Works for me. See my readers rigs for a picture. The fuzz is cottonwood tree junk.

Marv.

 

[Swayse]

Did this ever work out? I'm thinking of doing it with mine.

Yep it worked great. I went in at a 45 degree angle and left the pipe sticking in about an inch into the exhaust pipe. I have 5" strait pipe, no muffler=no restriction. I put a vacuum/pressure guage in the dipstick tube and took it for a spin. Empty cruising down the road it pulled a very little bit of vacuum, could barely see the guage move, . 1 I'd say. Wide open throttle, making over 60 psi on a 177,000 mile engine, it went the other way, but just barely, I'd say . 1 psi. I think better than stock. Just make sure you have no dips in the blowby line. I went strait from the breather tube over the trans to the exhaust. WARNING: this will coat your exhaust with oil from the inside that will burn off when you get on it hard=burning oil smell. AND: the oil vapor will mix with the carbon and flake out of the muffler on start up making a mess in the corner of your garage. And if your dog likes laying in that corner of the garage and he is a white german shepard, he won't look so pretty anymore.



Forrest Nearing did the same mod, he loves it.

 

[ABorchard]

Forest ended up eating crow when his dipstick blew out along with a bunch of oil.

Don't think he loves it anymore, read his post here near the bottom of the 2nd page http://www.dieseltruckresource.com/dev/showthread.php?s=&threadid=61348&perpage=15



Take my word for it, it will eventually happen to anyone who doesn't use a check valve.

 

[Stmpplr]

I would think this would also add a considerable amount of unburned hydro carbons to the exhaust gases. May be an issue with more areas requiring our trucks to be tested.

 

[McCRam]

I have been hoping Rbratby's original question would be answered, since I have been thinking about it myself. I think it was in the 24v forum that someone put a breather in the valve cover, like the ones in gasser valve covers. I believe they plugged the old tube. Can we do this on the 12v? Can we put one in one valve cover or would we have to put one in all six.



I can live with the oil on the truck, but I am not going to put up with it on the boat.

 

[Swayse]

Forest ended up eating crow when his dipstick blew out along with a bunch of oil.

Don't think he loves it anymore, read his post here near the bottom of the 2nd page http://www.dieseltruckresource.com/dev/showthread.php?s=&threadid=61348&perpage=15



Take my word for it, it will eventually happen to anyone who doesn't use a check valve.

All I can say, is that it worked for me. Tested and approved with a twin turbo truck that makes over 65psi, but I have 5" strait pipe, no muffler. Just make sure you check it with a vacuum/pressure gauge like I did, every truck is different.

 

[pwerwagn]

I like that Marv.

Cant comment on the breather method, But I took a 20 oz. water bottle and stuck it over the breather line and duct taped it. It works. I cut a few holes in the top for it to breathe.

--Jeff

 

[Spoon40]

I cut off the threaded portion of the oil filler tube on my '98 12v and clamped a K&N type valve cover breather to the one and one half inch diameter filler tube. To add or change oil just loosen the hose clamp. It worked for me. John

 

[McCRam]

I like that idea Spoon. So did you plug the drain tube then?

 

[Spoon40]

McCRam- I left the road tube and ran it to the rear of the trans via 1" sch 80 pvc. I hope this helps-John