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  1. N46 Head gasket diagnosis and advice?

    General BMW Discussions
    Hi, I recently bought a 3 series E90 2005 with the N46B20O1 engine (3 months ago) and has done 97,000 miles, I had two overheats, though the first was due to a bad clip on a pipe (I just replaced it with a jubilee clip), on that first overheat I had to keep driving it due to the road I was on...
  2. 2004 E46 318ci (N46), Manual - Crank but no start even after new fuel pump and filter

    BMW 3 Series Forum - Technical Talk on the BMW E46
    Hello guys, I have been having a bit of a nightmare with my car lately, I had to be recovered twice and car is with the garage still. I have a "crank but no start" issue, which was fixed (car worked fine for a day) and then happened again. Car was working fine and then one morning it would...
  3. E90 Oil Leak Nightmare!! (N46 Engine)

    BMW 3 Series - Tech Talk For All Gen Of 3 Series
    Hi all, recently joined and looking for some help, I have bought a 2005 (55 plate) Bmw E90 320i with N46 engine (117k miles) and its literally pi$$ing oil! I have changed the Oil filter housing gasket and the vanos seals, but the leak I am experiencing now is coming from drivers side somewhere...
  4. N46 Valve Stem seals replacement

    BMW 1 Series - Tech Talk For All Gen Of 1 Series
    Hi Apologies if this is in the wrong place but I did search and couldnt find what I was looking for . I have 2005 120 Petrol E87 and think I need the valve stem seals replacing. I am getting blue smoke after idling upon acceleration. I have changed the Oil separator CCV Valve (under inlet...
  5. 2004 E46 318ci (N46) - Differential Oil change

    BMW 3 Series Forum - Technical Talk on the BMW E46
    Hi all, I changed the differential oil today and thought to share my experience. First of all, I discovered that my car does not have a drain hole, only a fill hole. Luckily I have a fluid extractor pump so I used that to remove the old oil - about a litre. I then topped up with a Laser...
  6. N46 Eccentric Shaft Sensor

    BMW 3 Series Forum - Technical Talk on the BMW E46
    Hi, Hope someone can help. I have to replace my eccentric shaft sensor and I'm looking at some used ones on eBay. There appear to be two different types though both are allegedly suitable for the N46 engine. The obvious differences between the two are that on the back one has a small square...
  7. N46 Injector E83 Vs E90/E92

    BMW 3 Series - Tech Talk For All Gen Of 3 Series
    Hi people, New to this forum but thanks for all i've learnt here so far reading your threads Hope someone can help me with this: I have an X3 xdrive 2.0i E83 (mfg year 2009) with the N46B20BC engine (this is the exact engine nomenclature as stamped on my engine) When i check parts for it in...
  8. N46 E83 Injector vs E90/E92

    BMW X Series - Tech Talk For All Gen Of X Series
    Hi people, New to this forum but thanks for all i've learnt here so far reading your threads Hope someone can help me with this: I have an X3 xdrive 2.0i E83 (mfg year 2009) with the N46B20BC engine (this is the exact engine nomenclature as stamped on my engine) When i check parts for it in...
  9. Problem with N46 - 2A88

    BMW 3 Series - Tech Talk For All Gen Of 3 Series
    Hello guys, I have 2006 N46 and I have my timing chain set + oil pump chain set replaced by carmechanic and I did rest of the job. I have replaced eccentric shaft actuator + sensor, valvecover gasket, oil pan gasket, oil cooler gasket, water pump + thermostat. Before this I often had codes and...
  10. E46 318ci n46 2004 MV946 DME

    BMW 3 Series Forum - Technical Talk on the BMW E46
    Hi to any who reads this your going to laugh ok so i had a 318ci vert ? leaking oil like hell white stuff in oil cap so pulled the head of redone valve seals seated valves new compolite top end gaskit kit in the mist of this my bro good lad put the battery on back wards and blow the central...
  11. 2004 E46 318ci (N46) - Torque setting for deflection pulley

    BMW 3 Series Forum - Technical Talk on the BMW E46
    Hello guys, I will be replacing the mechanical tensioner pulley, deflection pulley (aka idler pulley?) and the v-belt in my car. My question is about torque values. I have found that the tensioner pulley is 40Nm, but I cannot find the correct torque for the deflection pulley. I have looked...
  12. Horrible noise on cold start (2006 318Ci N46)

    BMW 3 Series Forum - Technical Talk on the BMW E46
    Hi. This is a clip of my 2006 318Ci (N46) starting up cold: It doesn’t make the noise on a warm startup. It also has a tendency to idle fairly rough when cold, but I’m not sure it’s related. No warning lights or anything and the last time I had it read my mechanic didn't mention any codes...
  13. e46 n46 1.8i - Rattle noise when moving off in 1st and 2nd

    BMW 3 Series Forum - Technical Talk on the BMW E46
    I have recently purchased a 318ci for the summer and enjoying it at the moment (apart from the oil leaks!). However it has an annoying noise when you move off in first or reverse just as the clutch engages. It’s a sort of rattle/knocking. Lasts about 1-2 seconds then goes away until the next...
  14. E90 318i n46 2d07 throttle potentiometer

    BMW 3 Series - Tech Talk For All Gen Of 3 Series
    Permanent fault code, no issues with running, constant engine light, can’t reset with any diagnostics. So far- changed throttle body, re-setting the values-no difference Changed full wiring kit for engine bay. No difference Running out of ideas. ? Live data ?DISA potentiometer voltage 0.0V...
  15. 318ci 2005 N46 vanos rattle rings

    BMW 3 Series Forum - Technical Talk on the BMW E46
    Firstly, hello All, I've been looking to rebuild my vanos as it's developed that horrible rattle, my problem is I can't find anywhere that sells the replacement rings. I've looked through the forum but can't see any posts that can help due to the age of the posts, but if I've missed something...
  16. 2005 318i n46 rattle when warm

    BMW 3 Series Forum - Technical Talk on the BMW E46
    hi hoping someone can give me any ideas about my car, its been great up until now, its got the n46 2ltr engine with manual gearbox, drives great, starts good and pulls well, when it gets up to temp there is a rattle from the top end, i it only happens when i blip the throttle or hold the revs...
  17. 2004 E46 318ci (N46) - VANOS solenoid seals

    BMW 3 Series Forum - Technical Talk on the BMW E46
    Hello guys, I want to replace the seals of the VANOS solenoids and I came across some aftermarket ones that are made from Viton and claim to be better that the OE ones. Has anyone used these, or should I just get a set from BMW? If the aftermarket ones are better, any recommendations about...
  18. 2004 E46 318ci (N46) - Replace rocker cover gasket and chain tensioner

    BMW 3 Series Forum - Technical Talk on the BMW E46
    Hello, I plan to replace the rocker cover gasket soon, and while at it I will also replace the ignition coil tube seals. Is there anything else that is advisable to do as a precautionary measure while the rocker cover is off? Also I will fit the latest version of the chain tensioner, does...
  19. 2005 n46 320i oil pump and timing chain

    BMW Engine Conversions
    Hi, looking for some advice.After quite a lot of work on my car,recently coil pack,rocker cover gasket replaced, i,v been told by my local garage that the oil pump needs replacing,the people they use to get parts from told them that i need to get a new one from BMW,£650, and timing chain...
  20. E46 318 N42 engine smoke

    BMW 3 Series Forum - Technical Talk on the BMW E46
    E46 318 n42 2001 sedan So now my problem is that it smokes at takeoff after idle or stood idling at a trafic light so i disconected the vacuum line from the CCV on top of the intake manifold and plugged the intake manifold i saw some oil in the hose,so F-up CCV valve i started the car and out...
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