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m54 2.5l
1-12 of 12 Results
  1. Driveline, Performance, Tuning
    Just wondering if anyone here has done something like this as I cant find a thread... I bought a 2002 325ci MT (without doing my research first) and thought I could turn it into something with a bit more power until I could come up with the money to either turbo or SC it. Still waiting on the...
  2. Driveline, Performance, Tuning
    Hey guys this is my first post on here, I'm strongly considering building an M54B25 into a low compression engine for high boost applications. I can't find anywhere the differences between B25 and B30 pistons. The only thing I know is that the B30 pistons are lighter, would the B30 pistons in an...
  3. E46 General
    I have a m54b25 engine which burns oil and smokes occasionally. After a fresh oil change and about 100miles in and the yellow oil light comes on the dash. I recently put forte oil fortifier and forte valve stem seal conditioner which are oil additives. Now I put over 150miles on the car and the...
  4. E46 General
    CAR: 2004 325i M54 Auto w/220k+ miles. CODES: P0302 P16A7 (when car stalls only) P0171 (only 171, 174 never present) P0411 SYMPTOMS: Rough idle Misfiring Extreme power loss now Stalling Low MPG (16.2 down from 19.8) Crank no start (sometimes happens but the fuel pump, fuel filter, intake...
  5. E46 General
    I recently swapped the engine from a 2002 325ci into a 2005 x3 which originally had the 2.5 in it. When I start the car now, it misfires in cylinders 4 and 6, and will not drive. I believe it puts itself into a limp mode and sometimes disables the gas pedal. I have tested everything mechanical...
  6. E46 General
    Today I took my 04 325i (auto, M54 2.5l - 218,000 miles) to a local euro shop (with nothing but great reviews of course) and addressed a vacuum leak I had which would throw P0171. That leak was the hose connecting to the fuel filter. The reason i took it to the mechanic is due to a power loss...
  7. E46 General
    I have a manual transmission (124k miles). Due to Covid I had to isolate for 10 days and today was the first time I moved the car. Car started up just fine put it in gear 1 and when I was moving off it made a weird grinding sound. It only happens the 1st time and never again. I know my clutch is...
  8. Driveline
    ** FOR SALE ** BMW 325Ci E46 M54 B25 Engine (out of a 2001 325Ci not M3). Collection in person only. This has been taken from a 2001 3 SERIES with 325Ci coupe circa 150,000 Miles but may suit other models. The car has been owned by the same person since 2005, however it started to consume oil...
  9. E46 General
    Hey guys, I have an '03 325it and I'm hearing a chirping type sound when I step on the gas. Sounds like the chirp is coming from around the intake/intake manifold but I can't locate it. Only chirps when I first hit the accelerator but constant acceleration will not cause any sound. The first...
  10. E46 General
    Hello, I was just curious if anyone can relate to burnt oil smell from engine bay. I am experiencing this in my 2003 325i m54. There are no visible oil leaks on the engine. Smell is quite significant and sometimes goes into cabin. It probably has something to do with oil consumption which is...
  11. E46 General
    Hi, I pulled my fuel rail in the process of removing my intake manifold to more easily change the CCV plumbing. When the rail came off, the injectors stayed in the manifold. I reinstalled the fuel rail, pushing down hard over the injectors and taking care to make sure the rail/injector clips...
  12. E46 General
    I have searched and read as many threads as possible and haven't seen anything that quite details what my car is doing, so I hope someone on here may be able to pinpoint it or at least point me in the right direction. On my 2001 325 xi wagon, I have idle issues no matter what temperature it is...
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