Quote:
Originally Posted by gillzj00
Last night I took a candle out into the garage when I got home. Left the car running and blew it out under the hood near the PCV valve. I didn't see any smoking going into to the valve. It looks like there is a little cap on the end of the barbed PCV valve, do I need to remove that, if I remember right it is kind of clipped on there but moves freely?
The car wasn't squealing at that time but I seem to notice it when I am driving in a parking ramp and slowing down, I can hear a sound reflecting off the wall that sounds like the squeal I was hearing the other night. It only last 2-3 seconds.
I think I read that I could pull the oil cap off and put it back on and that would cause the engine to re-vacuum itself up and that might help me replicate the seal squealing.
I guess my question would be if the PCV valve seems fine, is it possible my rear main is just worn out? Would it be worth replacing the PCV with the new diaphragm as a cheap test?
Also, I have a good friend who is a Mercedes Benz Master Technician, should I ask him to do a smoke test for me or any other more technical diagnostic?
Thanks for all your help and responses guys, I know I am not an e90 guy so thanks for making me feel like family! 
Just got home, pulled oil cap off and put back on after 30 seconds or so, no squealing. Pulled following Carly codes and got myself excited with a horror story about the 28A0 and their camshaft bearing caps were expanding and about to fail?? ( http://www.bimmerfest.com/forums/sho...d.php?t=977220)
2 codes found:
28A0 - Throttle valve opening angle-intake pipe absolute pressure, comparision pressure too high
2775 - Air mass plausibility: air mass too low. |
Long shot but did you ever get these codes figured out. I'm having the 28A0 code on my N55 X5. Happened pretty much same time my serpentine belt jumped and shredded as I was pulling home. The code triggers manifold pressure sensors, but I'm getting a weird clattering sound also, so wondering if this could all be related to my front crank seal as I noticed there is a significant gap. I inspected carefully and pretty confident no belt got past.
Also wondering if it's related to the PCV valve bc after starting the car for a minute or so and shutting it off, I can see a little bit of smoke creeping up behind my crank pulley. Also smoke comes out when the oil cap is removed, seems way too quick for the motor to smoke like it does after a quick start and stop. Here is a picture of my front seal, looks like it's too far in and has a gap. Just need somebody to confirm whether this is normal or not. Need to know where to start as this is our family car.
Also read about a noise upon braking. I was getting almost like a grinding, squealing noise when I brake at slow speeds. I assumed it was the brakes but my pads still have a lot left on them. Even took the brakes apart a few weeks ago and cleaned them. But the noise never went away. Could that also be related to the front seal? Hoping @vespa can chime in as well.