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Crank Case vented to unused fuel filter housing?

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So I've been thinking that I want to put a oil trap on my crank case vent. My biggest problem is that I dont want to spend $200 on a kit. As I was thinking about options for a home made setup, I got a crazy idea...why not use the stock fuel filter housing? I have a FASS 150 on the truck already, so that housing is just sitting there doing nothing. Im going to look at what all i would have to change on it to make it work as my oil trap. Any ideas/gripes/complaints or comments about the whole idea??

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  • Author

Mike,I actually thought about this idea while I was at home depot buying the PVC for your MOD! My thought process is that if i catch the oil and just drain it when I change the oil, I shouldn't have to worry about freezing (although being stationed in Southern Cali means I rarely have to worry about that anyway) and I can drain everything caught instead of it venting to the underside of my truck. I was thinking to plumb the vent hose to the outlet side and vent the inlet. That should allow all the venting of pressure needed, while still catching any oil.

  • Owner

Let put it this way... With my mod I don't loose enough have to add oil. But I do put a few drips on the garage floor. The problem with the factory vent its mostly panic or hard stops that slosh oil out that tube. That why the reverse direction of mine to stop that action as well as up and over the engine to force the oil to try and climb.

My 7.3 actually vents into the intake :lmao: Yes it looks like just what you could imagine in there. Couldn't you guys just get one of those little K&N looking filters that you put on the valve cover? I've seen 12V's with them.

im going to thread a 1liter soda bottle to a pvc threaded adapter and glue it to the end of mopars mod, with holes in the bottle it will vent pressure but the oil will trap in the bottle. to empty, simply unscrew and drain bottle.

You put a check valve (1 way valve) on all the little holes exhausting the pressure. Then it blows out but doesn't allow anything in. Unless you were talking about condensation.

  • Owner

I was thinking of a dumb idea. Come down elbow back and tee hang the bottle off the tee elbow up and the elbow back down. Leave the bottle closed. This way you got a low point to catch oil and still vent out the end of the pipe.Hmmm it might just work...:think:

  Mopar1973Man said:

I was thinking of a dumb idea. Come down elbow back and tee hang the bottle off the tee elbow up and the elbow back down. Leave the bottle closed. This way you got a low point to catch oil and still vent out the end of the pipe. Hmmm it might just work...:think:

is there more oil in vapor form or droplet form? could do a p-trap style and put the bottle on the bottom of the trap (if this is what you were saying)?
  • Owner

Yea... Then you catch any liquid material that drips from the pipe. Typically the vapor is harmless its the liquid oil that is slung around by the fan that causes such a mess.

  • Author

My original plan was to plum the crank case vent into one of the fuel fittings, then put a valve cover breather type filter on the other. Totally just gut everything else, and put a drain valve in the bottom, just empty it when I change the oil.....

  • Owner

Too small of a fitting. It would blow the seals out of the crank. The hole has to be 1/2" or larger. Unless you planning on modifing it completely. As for draining it it will take a very long time. To drain diesel fuel out of there takes quite a while to empty. Thick oil will be even longer. :whistle:

  • Author

Thanks Mopar!! Thats the type of input I was looking for....I just didnt want to screw anything up. As of now, I almost have your mod ready to go on the truck (work has made it really difficult to find time to get it on!) so i'll run that for awhile, and I'll work on putting a catch can on later. Thanks! If I end up getting it to work, i'll let you guys know!

  Mopar1973Man said:

Really there is no big reason for the catch bottle really I drip so very little out in 2 months it not even worth noting really.

well at my place pitch black spots on a new driveway suck... lol
  • Author

Being Military, we're renting the house were in right now....and I had to pressure wash the driveway of the last place a few times and still got into an argument about the spots! Some Californians want their driveways to look like they were just poured forever!!!

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