1) I don't think just a bad plug or coil on one cylinder would cause any blue smoke out the exhaust. I wonder if something froze in the oil separator causing it to dump oil in the intake. Disclosure: I replaced the hose from the back of the intake to the oil control valve a few months back but did not use the $95 BMW hose, just made a 1" water
138 posts · Joined 2003. #3 · Jan 4, 2005. yupi am pretty sure the head gasket is blown :bawling: I notice more and more white smoke/steam coming from the tailpipe, and the white residue returned at the top of the engine under the oil cap (although it disappears afterward). I am taking it to avus autosport to get it diagnosed/repaired.
Check the Oil Filter Housing Gasket, Valve cover gasket, CCV, Oil cooler gasket (These will explain the blueish smoke). Oil pan gasket, the oil pan itself (look for damage), look around the oil level sensor for leaks aswell (this would explain the huge loss in oil). Valve stem seals will never let 1l go through in 100km. Just pull the plugs and crank the engine over to purge the cylinders. Put plugs back in, top off oil and start the engine. If the engine starts, you need to pick the car up and drive it for more than 1 hour on the highway and check the engine temp using the Hidden OBC menu. I know I performed this on my X5, but this will be 99% identical to E39's, E46's, E53's and anything else with an M54-M52TU engine. Parts used were bought at Autozone, PCV valve item # PCV1124DL $2.99. 1 Foot of 3/4 internal diameter Hose $1.50. 1 Foot of 3/8 internal diameter Hose $1.50. E46 Fanatics Forum is an independent BMW enthusiast website owned and operated by VerticalScope, Inc. Content on E46 Fanatics Forum is generated by its users. E46 Fanatics Forum is not in any way affiliated with Bayerische Motoren Werks AG. I am pretty sure I have a vacuum leak. I have checked the whole intake pipe but found nothing.
68-tank ventilation valve 53-LLFS opening coil Elec. 27-LLFS Closing coil Elec. 32-secondary air valve 140-output stage failure dmtl pump 126-output stage failure dmtl valve 124-Variable jet system can anyone assist me on where should I look to properly diagnose or to better pin point the issue? The battery needs replacing for starters but
Replace the crankcase vent valve, crankcase vent hoses, and dipstick guide tube. E46 (3 Series) rear-wheel drive only Part Number Description Quantity 11 61 7 534 237 Oil Separator Repair kit 1 11 43 7 565 437 Dip Stick Guide Tube 1 11 15 7 532 629 Hose 1 E46 (3 Series) all-wheel drive only Part Number Description Quantity
The air circulating through the PCV system helps to ensure that the fumes are drawn away from the crankcase and burned in the engine for use. The PCV system also creates a slight vacuum while the air is circulating, which helps to relieve any pressure that could build. This negative pressure is also beneficial because it can prevent oil leaks.

Remove dipstick and remove ccv input pipe from front left of valve cover, then blow air in the pipe while listening if air escape from dipstick tube. If not ccv clogged. Click to expand Once you sort out (or at least reduce) the oil consumption, you should do something about the carbon buildup on top of the pistons.

All thats left to do is 1. remove CCV and hoses associated 2. cap the inlet on the dipstick tube used for the CCV 3. replace o-ring on dipstick tube (might as well, lots of sludge around it) 4. fab up a hose to use on the distribution piece that connects BOTH inlets and attach that to the catch can. .
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