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compression
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  1. E90/E91/E92/E93 (2006 - 2013)
    I'm looking into buying an n52b25, and the one i came across had compression readings as follows: C1 - 15bar C2 - 14.5bar C3 - 14bar C4 - 15.5bar C5 - 16bar C6 - 13bar Is that too big of a difference? Cyl 1-5 look great, but cyl 6's reading is considerably lower. The engine otherwise runs good...
  2. E60 / E61 (2004 - 2010)
    Hello everyone, so I have a 2008 535XI with 77k miles N54 engine , my car won't start and gets zero compression in at least 3 of the cylinders according to my indy. Back story: I purchased the car the day it died. It had a very weak battery from sitting so giving jump start took a long time...
  3. E30 (1982 - 1993)
    Hello I'm new to the world of BMW and to the forums. Recently purchased a 1988 BMW 325i 5 speed with about 142K miles on it. Decided to do a bunch of maintenance based on how long it had been since the previous owner had replaced common parts. In total did the following Timing Belt Water...
  4. X3 E83 (2004 - 2010)
    Okay, I don't have the answer but I didn't find a page searching for the X3 so I thought maybe I'd ask and next person who searches for this could benefit from the answers. I know there are other similar models with instructions but always nice to find exactly what you're looking for. What is...
  5. E39 (1997 - 2003)
    I know I am going to get slammed for this, but has anyone ever attempted to replace a bad piston ring by simply removing the engine support and oil pan? From there one should be able to pull out the piston and apply a new ring and reassemble. I know this is not ideal for a multitude of...
  6. E36 (1991 - 1999)
    Ok so to start out, I bought a 1995 325is rolling shell manual and put in a getrag and m50 in it. Should be plug and play, or so I though. So once it was all installed, the car started after a bit of cranking but it did start.But now it wont start unless we push start it in which the car...
  7. E36 (1991 - 1999)
    Hi Guys.I have googled and googled all day and i cant seem to find a solution to my exact scenario hence me posting here on the forum.My sincere apologies if someone may have had the same problem and if my post seems like a duplicate. So... I bought me a 318is (the M44 engine) two months...
  8. E30 (1982 - 1993)
    I have 213k miles on my 90' 325I and my compression is very low in cylinders 6 and 5 it's 120psi. And it increases as I go to the front of the engine. What is the reasoning to this? About 140 or more psi in cylinders 3 2 and 1. I also have a lot of carbon build up on the spark plugs in cylinder...
  9. E39 (1997 - 2003)
    I've seen a few threads lately where the engine won't start, and, I noticed there wasn't a good thread in the bestlinks yet for the starting point for noobs. To be sure, there are PLENTY of threads on specific starting problems (related to gas, air, spark, compression & timing), and even more...
  10. E46 (1999 - 2006)
    So I purchased this 323i about 2k miles ago about 2 months ago. So I did put 2 thousand miles on it already. I've changed the oil 2 times in a month just to make sure its running clean oil. things were going great the engine ran smooth and the car was running slick on the road until about 2 days...
  11. E30 (1982 - 1993)
    Hey all, I bought an 87 325is about a month ago for cheap, and towed it home. I have great and reasonable suspicion that it had been sitting for a long time, even though the P.O. didn't say that. I put new fuel lines in it, changed the oil, checked all the fluid and topped off as necessary, and...
  12. E46 (1999 - 2006)
    I own 99 323I, it has 150k on it, I just love driving it. Last Friday morning, I saw the coolant indicator but drove it work with a plan to have the coolant filled near work (40 miles from home). One the way back home the coolant indicator disappeared, so I thought the indicator popped in the...
  13. E39 (1997 - 2003)
    I bought a 2003 BMW 540i with the 6 speed manual in December. It has 110K and has been running well, until a few days ago when it stalled at a stoplight and seemed to start running a little rough, but nothing too bad. (It has never even come close to overheating since I've owned it and the oil...
  14. 7 Series - E38 (1995 - 2001)
    So my 2001 740il with 136k has no compression in like 3 cylinders... so I am pricing out new engines and wanted some input on where to go for the best deals. Is there another type of engine that would be beneficial to switch to? Is it even worth repairing? I'm in Cincinnati OH. Anyone want to...
  15. X5 E70 (2007 - 2013)
    Hey all, I know that for the '11s and probably earlier, the audio system says it can read wma, mp3, etc., from a USB flash drive. Has anyone tried wma *lossless* with the system? The internal format is a little different as is the compression type. If you have, or if you could, I'd...
  16. E39 (1997 - 2003)
    Hi again :), have been carrying out compression testing on my 1997 520i and note that each cylinder (while hot) is giving a reading of around 105 psi (+- 2psi) does this sound right? When I'm testing compression sometimes the pressure drops and then jumps up again as if i'm losing pressure...
  17. E46 (1999 - 2006)
    Been having trouble with my 2001 330i 135,000 miles. Problem started with an apparent oil leak (white smoke in exhaust during ignition only, would occur once in a while only). No problems or loss of power. Mechanic tried cleaning out the engine, and ran a compression test - checked out fine...
  18. E90/E91/E92/E93 (2006 - 2013)
    Dear All, My E90 has started smoking on engine start-up. This happened after an oil leak was corrected (apparently the head gasket had the leak). The car is only 2 years old. The smoking does not occur at each and every start, but rather every 2 days or so. It happens most often in the...
  19. E36/7 Z3 (1996-2002)
    i have a 1999 Z3 with the 2.3 engine and am having problems with it. the car starts fine but when i start to drive it jerks and dose not go above 50mph. i can get it to about 80mph but then is slows down to 50mph almost right away. i brought it to a dealer and they did not know what to do. i...
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