Jason
09-23-2009, 04:09 AM
After getting some imput and suggestions, and trying a couple different ways of routing the CCV, it became apparent that there was no way to run it other than back into the intake unless you want a big mess, and annoying white smoke and smell! To help keep my future intercooler from becoming coated in oil, a oil seperator or catch can was in order. My only problem with just the catch can is the amount of oil this engine blows out in the upper RPMs. I run my car pretty hard, so this is a decent amount. I didn't want to have to deal with draining it all the time, and also the oil being dumped out is that much more you have to add back to the engine.
Here are a few pictures of the oil seperator with drain that I designed. This is a maintenance free system, as extra collected oil drains back into the engine. Also there is no filter to have to clean or replace. Not saying its as effective is the Mann provent for example, but I expect it should cut down on the amount of raw oil going into the intake by at least 75%. There is still going to be the misty smoke, but if you want to get rid of that you would need the $200+ Mann system. I only paid $1500 for the whole car...
Here are the parts layed out, I used a 6" long piece of 2.5" exhaust pipe, two VW gas caps (from an air cooled vw bug gas tank), and three 3/4" dia pieces of tubing. Two for the seperator and one to plumb into the intake. Also up in the corner are two universal valve cover vents I had laying around. Not pictured is a small piece of sheet metal that fits inside the tubing to be used as a baffle.
http://i1004.photobucket.com/albums/af168/vwjunkie53/000_0050.jpg
The next order of business was finding a place for the oil to drain back to the block. At first I was thinking of tying into the turbo drain, but decided not to for a couple reasons. It is a nice braided stainless line, with crimped ends. Cutting into this was going to be a pain, plus I would have to find a large diameter "T" fitting of some kind. Also, this is on the opposite side of the engine. There is much more space on the drivers side to install the seperator. After looking around, I had the idea of tying into the dipstick tube... Its direct into the bock, and much bigger than the dipstick itself, so there wont be much restriction. There is only going to be a few drips of oil comming down at a time anyway. Here is a pic of the dipstick tube with dipstick in it, you can see all the extra clearence for oil to drain past:
http://i1004.photobucket.com/albums/af168/vwjunkie53/000_0051.jpg
Next, I drilled a hole in the tube and welded in one of the universal valve cover vents.
http://i1004.photobucket.com/albums/af168/vwjunkie53/000_0055.jpg
Next I welded on two pieces of the 3/4" tubing, opposite each other. I then welded a piece of sheet metal in the middle of the tube. It is flush at the top, and extends down to about an inch from the bottom of the seperator. That way the oil blow by is going to run into the baffle, and travel down to the bottom and back up the other side and out the vent. The blow by hitting the baffle should collect a decent amount of oil by itself hopefully.
http://i1004.photobucket.com/albums/af168/vwjunkie53/000_0056.jpg
Last, I welded on the the VW gas caps to close off the ends. These worked out great and with the VW logo stamped in the top, it looks like it could be original equipment. Mostly it was because I had them laying around! I also welded in the last valve cover vent into the bottom cap for the oil drain.
http://i1004.photobucket.com/albums/af168/vwjunkie53/000_0058.jpg
I ended up mounting it off the cruise controll bracket with a stainless clamp. After painting it black, it looks like it should be there... I'll post up some feedback after I drive it a few days and see what the intake looks like.
http://i1004.photobucket.com/albums/af168/vwjunkie53/000_0059.jpg
http://i1004.photobucket.com/albums/af168/vwjunkie53/000_0060.jpg
Jason
Here are a few pictures of the oil seperator with drain that I designed. This is a maintenance free system, as extra collected oil drains back into the engine. Also there is no filter to have to clean or replace. Not saying its as effective is the Mann provent for example, but I expect it should cut down on the amount of raw oil going into the intake by at least 75%. There is still going to be the misty smoke, but if you want to get rid of that you would need the $200+ Mann system. I only paid $1500 for the whole car...
Here are the parts layed out, I used a 6" long piece of 2.5" exhaust pipe, two VW gas caps (from an air cooled vw bug gas tank), and three 3/4" dia pieces of tubing. Two for the seperator and one to plumb into the intake. Also up in the corner are two universal valve cover vents I had laying around. Not pictured is a small piece of sheet metal that fits inside the tubing to be used as a baffle.
http://i1004.photobucket.com/albums/af168/vwjunkie53/000_0050.jpg
The next order of business was finding a place for the oil to drain back to the block. At first I was thinking of tying into the turbo drain, but decided not to for a couple reasons. It is a nice braided stainless line, with crimped ends. Cutting into this was going to be a pain, plus I would have to find a large diameter "T" fitting of some kind. Also, this is on the opposite side of the engine. There is much more space on the drivers side to install the seperator. After looking around, I had the idea of tying into the dipstick tube... Its direct into the bock, and much bigger than the dipstick itself, so there wont be much restriction. There is only going to be a few drips of oil comming down at a time anyway. Here is a pic of the dipstick tube with dipstick in it, you can see all the extra clearence for oil to drain past:
http://i1004.photobucket.com/albums/af168/vwjunkie53/000_0051.jpg
Next, I drilled a hole in the tube and welded in one of the universal valve cover vents.
http://i1004.photobucket.com/albums/af168/vwjunkie53/000_0055.jpg
Next I welded on two pieces of the 3/4" tubing, opposite each other. I then welded a piece of sheet metal in the middle of the tube. It is flush at the top, and extends down to about an inch from the bottom of the seperator. That way the oil blow by is going to run into the baffle, and travel down to the bottom and back up the other side and out the vent. The blow by hitting the baffle should collect a decent amount of oil by itself hopefully.
http://i1004.photobucket.com/albums/af168/vwjunkie53/000_0056.jpg
Last, I welded on the the VW gas caps to close off the ends. These worked out great and with the VW logo stamped in the top, it looks like it could be original equipment. Mostly it was because I had them laying around! I also welded in the last valve cover vent into the bottom cap for the oil drain.
http://i1004.photobucket.com/albums/af168/vwjunkie53/000_0058.jpg
I ended up mounting it off the cruise controll bracket with a stainless clamp. After painting it black, it looks like it should be there... I'll post up some feedback after I drive it a few days and see what the intake looks like.
http://i1004.photobucket.com/albums/af168/vwjunkie53/000_0059.jpg
http://i1004.photobucket.com/albums/af168/vwjunkie53/000_0060.jpg
Jason