| L9 crankcase vent |
| 08-13-2026, (Subject: L9 crankcase vent ) Post: #1 | |||
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| L9 crankcase vent Alright this l9 has me scratching my head again. I have a feeling the answer is obvious but I'm unable to find it. So I'm trying to permanently service the ccv filter in this l9 which I understand how this system usually works. At least on the pickups. So there's 2 lines coming out of the valve cover one looks to drain back down into the engine and the one for the vapor has me stumped. There's no port on the intake like the pickups so this vapor line looks like it runs up to the air compressor. That's the direction it's going at least before it gets lost behind everything else. If that's the case is there any reason to vent it to atmosphere or just gut the filter and slap it back together. I'm assuming that if it's not going into the inlet of the turbo that it can't be anywhere else in the intake because the turbo would put pressure in the crankcase. This is on a freightliner m2 so anyone familiar with those knows the intake is only about 8 inches long between the air filter and the turbo so I'm sure nothing is connected there | |||
| 08-14-2026, (Subject: L9 crankcase vent ) Post: #2 | |||
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| RE: L9 crankcase vent not sure about that one but on the commercial 6.7's .. the cc filter is in the top of the valve cover. Simply removing the filter all together and re-installing the cover is all someone needs to do on them. User's Signature: ->: What I post is just my own thoughts and Opinions! --- I AM Full Of S__T!. | |||
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| 08-14-2026, (Subject: L9 crankcase vent ) Post: #3 | |||
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| RE: L9 crankcase vent as i remember correctly the ccv filter looks like your valve cover and its not cheap around 150, u dont have to remove anything just remove the 10mil screwes , you remove the valve cover and the filert is under it , hope this helps | |||
| 08-16-2026, (Subject: L9 crankcase vent ) Post: #4 | |||
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| RE: L9 crankcase vent on the L9 you have to remove the filter and cut out the center of it leaving just the gasket around the perimeter. If you don't do it that way the filters cover will not seal and dirt can get into your engine. | |||
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