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  1. Technical Guides for the E36, E30 and E21
    In that video we gonna work on BMW E46 320D facelift 150hp M47N engine ! Mass air flow ( MAF ) sensor (part number: 13712247002) is quite easy to replace, but not the case with charge air pressure sensor (boost pressure) replacement. Let me show you how to replace it and where is located ! BOOST...
  2. BMW 3 Series Forum - Technical Talk on the BMW E46
    I am experiencing no torque under 2500 rpm, almost feels like a turbo lag. And car spews black smoke but not instantly after pressing the pedal. I have changed the air filter, changed MAP, and an injector The previous MAP read 1300kpa at idle and without turning the car on, now it reads...
  3. General BMW Discussions
    Hi all, I've blanked off the dreaded swirl flaps on my 320cd today, and when tightening the 8 bolts on the intake manifold I overtightened one of them and I think it's stripped the brass insert from the plastic that the bolt screws into. Anyone have any info on whether I can leave the screw out...
  4. BMW 3 Series Forum - Technical Talk on the BMW E46
    Hello everyone, I'm new on the forum. My car's problem has forced me to register on every single BMW forum out there. So back to the point. I have a 2003 320d m47n 110kw. last May I had to replace the engine and the turbo(they died). Engine is the same with 110k miles on it. Since then my car...
  5. BMW 3 Series Forum - Technical Talk on the BMW E46
    Hi all, Alternator packed in, bought a replacement, had a bitch of a time switching them (my power steering pump is above it, is that an M47n?) fitted the belt back on and turn the engine only for the belt to explode. Had a look and think the idler pulley may be shot as well, it turns but is a...
  6. Items WANTED - Post any wanted adverts in here
    Hello, Im after a sump if anybody has one or knows of an engine breaking Just gone to change the oil on my E46 and the previous owner has bloody welded the plug in!!! :mad
  7. BMW 3 Series Forum - Technical Talk on the BMW E46
    Hi all, please be gentle on my first post... My wife took my car to Dublin today and after visiting her auntie could not start it. The engine turns over and will not fire. Battery is fine. There was a mobile mechanic up the road that her auntie knew so he had a quick look and said that it...
  8. BMW 3 Series Forum - Technical Talk on the BMW E46
    *FIXED* 2004 320d M47N - Replaced Waterpump and Stats, Electric Fan Not Operating Replaced the pump and both stats today as the engine temp never exceeded low 70's (temp monitored via the OBD hidden function) - I found the solution on the site, thanks to all who contributed in many posts...
  9. BMW Engine Conversions
    After a meldet piston i am looking to swap engine and i want to know if i can change it to M47TU or a diferent engine? What could be the problems?
  10. BMW 3 Series Forum - Technical Talk on the BMW E46
    I know it's been done to death so I'll try to keep the question specific because I'm still not sure if this needs doing. I've been watching the coolant temp on the OBC and it more or less controls to 84C. Will go higher up to ~87C if it's left to idle. but 84-85 is where it's at on the...
  11. BMW 3 Series Forum - Technical Talk on the BMW E46
    Hi, My tensioner is rattling and making noise at low revs. I tried to find some manual or tutorial for replacing it but unfortunately I could not find any. My question is do I need to remove the timing case cover to get access to the tensioner? If yes is there some kind of manual or some sort...
  12. BMW 3 Series Forum - Technical Talk on the BMW E46
    Hello guys, I have an interesting fail to share, would you please help me as I am stucked right now? I bought 2002 e46 320d touring M47N engine, 300.000 miles on the clock. Cheap as chips, but running well according to the mileage. It was running lovely after I fixed few minor issues such as...
  13. BMW 3 Series Forum - Technical Talk on the BMW E46
    Made a quick inspection under the bonnet today and noticed what appears to be a vacuum pipe with one end unattached. Closeby (within 50mm) I can see a component with a male connecter, unfortunately I can't get my fingers into the confined space to reattach the pipe. A pair of 12" forceps would...
  14. Items WANTED - Post any wanted adverts in here
    hi Im looking for e46 320d facelift m47n engine block. regards Mel
  15. General BMW Discussions
    Hi there , just wondering if anyone knows why bmw changed the port size on inlet no4 ( vert port next to injector ) on the e90m47n head compared to the earlier e46 m47n head? It's only narrower on no4 not any other ? Reason I'm asking is I have an 04 compy 320d msport which needs another head...
  16. BMW 3 Series Forum - Technical Talk on the BMW E46
    Hi All I have to make a quick decision between two options as follows 1) Rebuild engine by replacing 4 valves and new inlet manifold total cost including parts and labour £550. 2) Replace with used engine with the mileage of 122K total cost including labour is £900. I am attaching pictures of...
  17. BMW 3 Series Forum - Technical Talk on the BMW E46
    Hi BMW forum My 320D 2002 Diesel Auto has engine 4 valves are damage in one circle. Mechanic suggested that by changing the inlet manifold and valves this should be fine. I need advice if this would be fine or not or i need to replace the whole engine. He says piston looks fine to him but i am...
  18. BMW 3 Series Forum - Technical Talk on the BMW E46
    Hello all, hopefully someone can shed some light on the issue which I am experiencing. When I turn the ignition on (but don't start the engine) I hear what can only be described as a short lived screeching/scraping noise, I have identified it as coming from the turbo area. From what I can see...
  19. BMW 3 Series Forum - Technical Talk on the BMW E46
    2004 E46 320D Variant AS72, M47N engine - Starting issue - Now fixed Looking through the forum this topic comes up too regularly. I have found out lots, but not a solution. The car runs beautifully once it does start and never stalls or hiccups etc, purely a starting issue. Does this car have...
  20. BMW 3 Series Forum - Technical Talk on the BMW E46
    Just had the sump cover off to do a job and noticed a wetting of oil around the power steering. It seems to be coming from the intake side of the turbo which is just pushed on. Traced back further to the breather. has a Vortex breather How much oil should get past the vortex? its not currently...
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