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  1. General BMW Questions
    Hello , sorry if this is the wrong forum . New user. I’ve had my 3 series a few years and when I went to top off some coolant/check levels my o ring from the raditor cap slid off and fell into the reservoir I went to grab it and it sank !! I tried to find it but no luck . Cap looks like its in...
  2. 3 Series & 4 Series
    I recently bought a 2011 335i sedan with the n55 engine. The car has about 57,000 miles on it. Right now I’m having all sorts of weird things go on and wanted to see if any of these could be related with each other. Ever since I bought the car, every once in a while, and ONLY on warm starts...
  3. General BMW Questions
    Hey guys, What are the possible causes of the coolant going to the intake manifold? Did you have the same problems before, how did you solve the problem? Now one of my friends has the issue. It might work if he just bypassed the coolant lines to the throttle body. But I wonder whether there...
  4. E30 (1982 - 1993)
    I own a 1984 318i and was on the way to the mechanic for a starter issue. My heat has worked before with the odd noise here and there but A/C never worked. When the fan was turned to the lowest speed, while I was driving, coolant scented steam started blowing through the vents very fast, almost...
  5. E39 (1997 - 2003)
    So recently I had an upper radiator hose failure and It spewed green coolant everywhere and now after it’s fixed I still have green coolant. I know BMW’s are supposed to have blue coolant so idk should I flush it out or just stick with green? I’m asking bc I’m low on coolant and need to add some...
  6. E60 / E61 (2004 - 2010)
    I recently purchased a brand new Borg Warner OEM replacement for my 2007 550i from FCPEuro.com after realizing i needed to replace the water pump and water pump pulley. On my way to work a few days ago the upper coolant hose had so much pressure it popped and so i replaced that. today i ran...
  7. General BMW Questions
    hi everyone, first time poster, and possible first time bmw owner. So i recently got a used 2005 645ci from honda dealer down in sarasota florida, (paid $13k including taxes and everything, with 62k miles) we test drove it, drove great, put the downpayment on it and they sent it in for...
  8. E60 / E61 (2004 - 2010)
    A few days ago I replaced my upper coolant hose due to a leak. After replacing the hose, I decided to pour distilled water in the coolant reservoir ( so that I don't just waste any coolant ) just to see if there are any more leaks. I attempted to start the car, but now after it starts, it stays...
  9. E39 (1997 - 2003)
    Can anyone help me, i wanted to add some more antifreeze into my 1997 523i and i wanted to bleed it, however, when i turn on climate control on max temp and fan on lowest, open both bleeding caps(screws), nothing is happening, tried even the highest fan setting, nothing, car blows hor air into...
  10. E39 (1997 - 2003)
    Hey guys, my 1997 523i had a crash back in 2018, only radiator was damaged, nothing much, and was fixed by previous owner, however, i'm pretty new to BMW's i bought it a few months ago, and i was doing the usual check of the engine when i found out that the coolant temp sensor that is located on...
  11. 5 Series
    I, recently, had a mysterious coolant leak coming from a weep hole near my water pump in my 2009 550i. After calling around to several auto shops, the price seemed like it would be steep to fix the issue. The coolant was actually coming from the front seal of the coolant transfer pipe. After a...
  12. E46 (1999 - 2006)
    Hey! I have been trying to find the coolant leak on my 99 e46 for a few weeks now and I don't know what it could be. After getting a coolant system pump I found the first leak, which was at the thermostat, and successfully fixed that by changing the thermostat housing gasket. Now it's leaking...
  13. 5 Series
    Hello! I recently changed both my thermostats since it was not getting warm enough. When I did this, i poured in(what i thought was 100%) coolant. Everything worked fine. Temps in the 90's and stationary 97, then it opened up en cooled it back to 92. Driving to 90 and so on. Also on highway and...
  14. F10 / F11 (2011 - 2016)
    Hey everyone, So I keep getting a notice that my coolant level is low; however, my reservoir is maxed. I recently drained what I could and replaced the sensor in the bottom of the overflow tank and I am still getting the same notification. Engine isn't overheating otherwise and everything else...
  15. E39 (1997 - 2003)
    1997 e39 528i here with ~230k mi My coolant has been leaking for a while now but never found a place where it could be leaking! I couldn't even find the floor stains with I park it in my garage because as seen in the photos, it seems like it evaporates since it comes to contact with the exhaust...
  16. F10 / F11 (2011 - 2016)
    So I have a coolant leak that started after I had replaced the oil filter housing gaskets; however, it does not appear to be coming from the coolant lines feeding into the oil cooler. I had to remove the fan and I was thinking a line may have gotten cracked when I was putting the fan back into...
  17. E90/E91/E92/E93 (2006 - 2013)
    Hi everyone, I've had a coolant leak in my 2007 335i coupe that so far has resulted in the replacement of: my radiator, then my oil filter housing gasket, and then my water pump this past Tuesday (3/24). Tuesday and Wednesday, I was able to drive probably about 270 miles with absolutely no...
  18. 7 Series - E65 / E66 (2002 - 2008)
    Hi all! Please help me figuring this out- Recently, I was driving my car and felt pretty cold (outside temp around 3c) Activated hidden menu (genious way to check engine temperatures, much better than a normal dial on speedo) and yes- coolant was around 60c. Drove to service and replaced both...
  19. Do-It-Yourself H.Q.
    I tried to start this thread a couple of days ago as my first bimmerfest post, but it said something about awaiting moderator approval and hasn't appeared. Some of my thought process is posted in various replies to others on this board. I'm a newbie to BMWs but no stranger to engine...
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