Quote:
Originally Posted by buffa98
By test mode do you mean that it is still on just not working? I am exempt from emissions testing BUT I still need to have the original parts on car. It also depends on who does the state inspection.
Please explain test mode, Also on your 300 does that have the same motor as mine? 603xxx
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On the 603, there is an oil separator in the valve cover. The black plastic elbow feeds crankcase vapor into the air intake elbow in front of the turbo compressor. On older engines, where the separator isn't working so well anymore, it also feeds a good amount liquid oil in. Pull your elbow off and check it. This also contributes to a soot filled intake (but not as much as the EGR.) The factory separator has a spring loaded mechanism in it instead of just a set of baffles and duct work like most others. It's also riveted in on the inside. It is still in place and not bypassed. I have to have the "in place" inspection in NC, also. What I have is the hose going into a vented catch can and not into the intake elbow upstream of the compressor intake. The intake is capped off during the testing so I do not draw in unfiltered air. What IS bypassed is that intake elbow. I'm testing how much oil comes out in a given time in order to gauge how big an external oil separator/catch can I'll need. ALSO there is a chance we'll plumb the oil back into the engine so we don't need to drain the can periodically.
If you loosen the oil cap and let it sit in place you can guess-timate the engine blow by according to how much the cap 'dances' like it's on a boiling tea pot. No dance = good. BUT, in the 603 the PVC hose elbow ends right by the cap so it gets sucked down by the intake vacuum. When you eliminate that intake vacuum, (remember - up stream of the turbo's compressor is the other end of that hose) the oil cap will not get sucked down. You'll also get a much better indication of blow by. I've seen a few gas and diesel, you actually had to hold the oil cap down to keep it from flying off.