PeachParts Mercedes-Benz Forum - View Single Post - ReRouting CCV lines on E300 [NON-Turbo]

michakaveli · #9 02-23-2004, 04:28 PM

What does CCV stand for?
CrankCase Ventilation.

What was its origional design intention?
Used to be burned off and keep the oil vapors from getting into the atmosphere. Partially emissions regulated. A way to keep everything contained in the engine.

Why is it not necessary?
It still exists, it is by all means necessary. Just rerouting the gases from traveling through the intake and prechambers, etc. Getting rid of it instantly to the atmosphere. The CCV gases enter at the end of the intake, right before air enters the engine. I assume that this vapor goes into the prechamber, over time making a nice glue and solidified carbon build up, not allowing glow plugs once unscrewed to be removed. (I could be wrong, but a good guess non-the less).

Have you seen any impact on performance?
Since I've cleaned the crossover tube, sprayed the resonance flaps with brake cleaner and re-lubed them with a few drops of oil, reassembled, throttle response is just butter. Really smooth acceleration. On the highway now when I punch it, it revs up to like 4000k like before but has a firmer kick when it keeps going. Wasn't as noticeable as before.

But I'm glad now that with the EGR blocked and the Crankcase vapors rerouted, only fresh air enters the entire intake tract and into the engine. If I am wrong about any of my assumptions guys please respond.