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thermostat

  1. Thermostat/water pump issue

    General E46 Forum
    I just bought my 325i and when i plugged in my scan tool while driving I noticed that my engine was at 99C and my radiator was at 27C. I tried to bleed the system with some distilled water just to see if that was the issue but I don't believe that it is. The radiator stayed stone cold the...
  2. Strange coolant issue

    General E46 Forum
    Hi all, I’ve got a 2002 M3 but I’m posting in the general forum as the same thing could maybe happen with any model. So the issue. The car has been in storage for a couple of months but I needed it about a fortnight ago. All was good when I put it away and it started and drove fine when I got...
  3. Coolant Temperature Rapidly Changing

    General E46 Forum
    A few months ago I had a little scare with overheating. It turns out one of the coolant lines was loose and resulted in coolant leaking out. Everything was fixed but ever since then I've made a note to turn on my obc to the coolant temperature to keep a closer eye on it, which brings us to this...
  4. E46 320CD overcooling

    General E46 Forum
    Hi everyone, i have an e46 diesel, my car used to get up to temp and then cool once on the motorway. I self- diagnosed this as a faulty thermostat and had it replaced. The car now stays at temp once its on the motorway. However, i have noticed that when i stop accelarating or going down hills or...
  5. ATF Thermostat Won't Sit Properly - HELP

    General E46 Forum
    First off, I have SCOURED Google and these forums for an answer, so sorry in advance if I missed it. Anyways, I have a 2000 323i and long story short, it overheated due to the idler pulley breaking, so now I'm replacing the expansion tank. When I went to pull out the old atf thermostat...
  6. How I dominated the beast or how I avoided that my M54B30 to overheat

    General E46 Forum
    Long time without write in the forum but last week my e46 it almost overheat and I want to share my history, all was good until a few days back when I return to my home from work, two blocks before my house my car start to rise temperature by one grade by grade in a very slow way, I mean one...
  7. Thermostat or not the thermosat? That is my question.

    General E46 Forum
    Hi all! I own a 2005 330i with 193k+ miles. Bought it for my kid half a year ago. Still runs great. However, we've noticed a couple months back that the thermostat gauge is reading half way. We recently drove it on a 6 and another 8 hour trip and the engine did not overheat even in...
  8. Troublesome cooling system

    General E46 Forum
    Hey everybody. So I have a 2000 323i automatic that just won't behave. A couple of days ago I was driving home and overheated. A surprise since last summer I replaced the expansion tank, radiator, and hoses. Got the car towed home refilled with coolant and she held everything without spilling a...
  9. No Solution

    DIY: Do It Yourself
    Hey everybody. So I have a 2000 323i automatic that just won't behave. A couple of days ago I was driving home and overheated. A surprise since last summer I replaced the expansion tank, radiator, and hoses. Got the car towed home refilled with coolant and she held everything without spilling a...
  10. thermostat

    General E46 Forum
    Hello. My engine dont get warm.. And because of this I want to change the thermostat! I need some help to fint the thermostat on my 316i 2004. Got a picture of the engine in another 316i that I want to take the thermostat from. Would be awsome if you could help me and maby paint a ring around...
  11. Code P0128 *replaced Thermostat* Code P0128 AGAIN!

    General E46 Forum
    Hey guys, I'm having a bit of a strange issue with my 2001 325xi. I first started getting this P0128 code that suggests that my thermostat might be stuck open. I looked it up on the forums and then found that i should probably replace the Thermostat, so I got myself an eBay thermostat (no...
  12. Possible blown head gasket on 2000 BMW 323ci ?

    General E46 Forum
    First of all, I know there are many posts under " head gasket" but this is my first post and I still had to ask before spending big bucks. A little background,(and the biggest regret of my car ownership life) I had to drive my car after the expansion tank cracked, all the coolant was leaking...
  13. New to forum! Experiencing over heating...

    General E46 Forum
    I have a 2003 e46. 2 weeks ago my expansion tank got a crack and over heated. I replaced it with an OEM tank and OEM upper radiator hose. I then filled up the tank but little did I know since its my first bmw i had to remove the bleeder screw and turn on my heat then fill up. So my car started...
  14. Summer and yet another cooling question.

    General E46 Forum
    Today was a pretty hot day around here and I was stuck in traffic at noon for a nice 45 minutes surrounded by other 300 running cars. I became concerned about the temp raising due to being stuck, with 90F outside and the A/C on so I used the hidden OBC. To my surprise, the temperature was a...
  15. So, um P1624 anyone?

    General E46 Forum
    So I just got the P1624 SES on my 2000 e46. I know this is computer/ engine specific, so I have a 2000 328i M52tub28 engine 5 speed auto/sport :thumbdwn: I believe the date of MFG is around march of 99. I've heard it could be the thermostat with my model and year. I replaced the upper/lower...
  16. Water pump failure, parts questions

    General E46 Forum
    Hey, over the weekend I had a water pump failure. Have some input on a few things i noticed before the failure which I will post to this thread tonight. Just want to get the questions out there so I can get parts ordered. Front bearing on pump is completely gone. I took the pump off. I...
  17. overheating strangeness! (no smoke, no milky oil, no leaks, new parts)

    General E46 Forum
    2001 325i Manual Wagon 166k factory electric puller fan (no mechanical fan and no front Aux pusher fan) Issue: Short story: blew expansion tank (replaced it) Yes I bled correctly fan not working (replaced it...still not working) Still overheats on highway with RPM between 1500-3500 RPM (no...
  18. Emergency: Reduce the M54s thermostat operating temperature cheaply and quickly

    General E46 Forum
    Hey guys and gals, The YouTube channel "B is for Build" is currently patching together a 2001 e46 325i for Oregon's "500/500 Rally", where one takes a $500 car and drives it for 500 miles on fire roads and whatnot. Anyways, Chris of B is for Build has built a custom cooling system, but he'd...
  19. M54 Water pump, Thermostat, Serpentine Belts Complete DIY

    DIY: Do It Yourself
    Guys, here's the complete DIY video on replacing your M54 thermostat, water pump and serpentine belts: https://www.youtube.com/watch?v=rci7ASOme7o
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