Oh boy, what a crazy couple of days. In early December I installed my Billet Technology catch can into the airbox like suzieque’s photos. The catch can worked great in the city for over a month. I just had my first long trip. I had the Jeep on the highway for 120 km at an average of 118 km/h, with one rapid acceleration. When I was approaching my rest-stop I smelled some oil and the oil light was intermittent. At the stop I was able to see loads of oil which had spurted from the dipstick, coating everything directly behind the dipstick. The dipstick was out of its seated position by about a half inch and there were no other obvious signs of oil leakage from anywhere else. The inside of the hood over and behind the dipstick was covered in oil (like it had erupted). The dipstick was reading below minimum oil. Odd and scary. At my rest stop I needed to add 7 litres of oil and it still was not at max. That’s a lot of lost oil!!!! What a mess, Oil everywhere!
After adding oil the trip continued for 100 km and the dipstick remained in position but there is a small amount of oil leaking from the dipstick. Not blown out – just seeping out. Since the replacement of oil I have driven a total of 300 highway km and the oil continues to seep out from the dipstick.
1. I used 3/8 inch rubber fuel line for the catch can install. 3/8 inch was easy because I could find barbed fittings and a fuel grade rubber hose at Princess Auto. Seems ½ or ¾ inch fuel/oil grade hose is more difficult to find. Does the hose need to be ½ inch or ¾ inch in order to permit enough blow-by without pressure build-up?
2. I have one 90 degree bend similar to suzique’s photo on page 1 of this thread (at the turbo outlet). But my 90 degree bend is made of a 3/8 inch metal fitting. Suzieque is your 90 degree fitting at the turbo outlet metal? It looks similar to a fitting used in the natural gas/propane industry. Could my 90 degree bend be causing some pressure build-up in the oil system somewhere?
3. During my last oil change I noticed there was no o-ring on the dipstick so I consulted a local shop and we found one that would fit. Could the O-ring on my dipstick be too small? Does anyone have a part number or exact size (interior/exterior dimensions) of the stock O-ring on the dipstick?
4. r unda - Where did you get your 1 inch “U” shaped hose? What application is this originally designed for? I couldn’t get a hose that didn’t kink when bending. Where did you get your 1” to ½ inch reducer? Again what application was this originally designed for (automotive or something else?) Is your ½ inch hose fuel grade?
I need some help with this issue or I will be forced to go back to the stock set-up and risk the long term issues with the oil blow-by. Any ideas?
I used the diameter of hose included with the Billet Technology catch can. I'd have to grab some scrap hose to measure the inside diameter, but I'm pretty sure its bigger than 3/8" that you used. A 3/8" hose could be introducing a 50% restriction in airflow over a 3/4". Some of the ebay catch cans do have small diameter hoses and fittings, you want to avoid those (in my opinion) on diesel engines.
It took me a bit of time at Home Depot to find an adapter to go from the CCV valve and take a 90 degree turn to the Billet Technology catch can.
I've used my Jeep with the Billet Technology catch can installed while pulling my trailer and I know it was running at near full turbo boost so lots of crankcase pressure but no issues with the dipstick or oil fill cap.
I carry the stock CCV hose with me in case I need to drop in at a dealership, takes me less than 10 minutes to remove the Billet Technology catch can and hoses and return to a stock setup. I will do a measurement of a cut stock CCV hose at some point, seems to me the inside diameter of the stock CCV hose (in the center section) is 3/4", but the stock hose returns to the air intake tube so a vacuum is being applied to the stock CCV hose. That is why I ran by return hose to the airbox, at least some vacuum is being applied.
I got pinged by another member on another forum because his setup did freeze up with some condensation. He was parked outside in northern Alberta. I don't remember if he ran the return hose to the airbox (like my setup), or if he just ran it under the Jeep. I am pretty sure he ran the return hose under the Jeep. I park in a heated garage, so I have not seen the freeze up problem myself.
I ran 3/4" heater hose while with my Racor, it was fine for a short term, its just not oil rated hose.
Do you carry the stock CCV hose? Did you route the Billet Technology catch can return hose to your airbox like I did?