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expansion

  1. Technical Guides for the BMW E31.
    Well, mine lasted 21 years before it popped - but it did pop in the end. Here's how to change it:
  2. BMW Z Series - Tech Talk Z1, Z3, Z4, Z8, Z9
    Hi All, Does anyone know how to remove this retaining screw out of the expansion tank top plate. Added a pic to show exactly where it's located. Appreciate any replies. Jenk
  3. BMW Z Series - Tech Talk Z1, Z3, Z4, Z8, Z9
    Hi All, Does anybody know whether the two pins to remove the expansion tank on a Z3 are allen key or pozi scewdriver. Im having trouble removing them, any suggestion please. Actually it is supposed to be a 5mm allen key, the problem is that the last owner may have tried to get the tank out...
  4. BMW 3 Series - Tech Talk For All Gen Of 3 Series
    Hi, First post on this forum and hoping for some advice. :) I have a coolant leak on my 2011 335i which appears to be emanating from the coolant expansion tank (white dribbles appearing down the side of it). The job to change it looks fairly straightforward, but I've no idea where to buy a...
  5. BMW Guides and How To's
    Hi, My expansion tank mountings are damaged, so I've brought a replacement. Looks fairly simple to change, but I noticed what looks like a sensor plugged into the bottom of it. Does anyone know if this is as simple as unplug and plug into the new unit? Or is it one of those things that will...
  6. BMW 3 Series Forum - Technical Talk on the BMW E46
    mine question is:on e46 m43 engine when i push down measure stick in expansion tank i should get warning light to fill up the coolant right?i have wierd stuf going on when i stay aprox 4500 rpm mine warning light to add coolant turns on and when i drop rpm it goes away.so i tried to push down...
  7. BMW 3 Series Forum - Technical Talk on the BMW E46
    Going through a few jobs on an e46 328i i bought to do rust to rome in this year. While doing the sump and oil filter housing gaskets i found the expansion tank to be leaking at the bottom and wonder if anyone know the o-rings require to sort it and were to get them from? Thanks
  8. BMW Guides and How To's
    https://youtu.be/pgzjpO2h5jg
  9. BMW 3 Series Forum - Technical Talk on the BMW E46
    I've got a hairline crack on the side of my expansion tank, having to top up coolant every week. Should I replace the tank, or repair somehow? I would replace but i've read how it's quite tricky to replace without breaking the thermostat underneath or very old coolant pipes. Mileage is 150k...
  10. BMW 3 Series Forum - Technical Talk on the BMW E46
    Hi Folks Not been on here for a while Anyway the missus trusty 2004 330i sport tourer has had the coolant level warning coming up now and again. Seems no water loss, float seems to be sticking. On closer inspection the float fell apart, very brittle. Ordered new header tank, question is...
  11. BMW 3 Series Forum - Technical Talk on the BMW E46
    Hey Guys, I read allot in this forum about how to bleed your cooling system with the ignition on, max heat, unscrewing the expansion tank cap and the bleeder screw. And that's just what I did: the car is cold, I unscrewed the cap, the bleeder screw, turned the ignition on, fan on low but max...
  12. General BMW Discussions
    Hi All, I had some guys come to look at my E60 525d BMW. They seemed like pleasant enough folks and were polite enough. However I was distracted and when checking my CCTV footage afterwards I noticed one of them doing something at the back of the car, while a neighbour told me one was doing...
  13. BMW 3 Series Forum - Technical Talk on the BMW E46
    Hi Guys..... Was just checking the coolant level this morning in my 330 ci sport and noticed a slight pressure release sound when removing the expansion tank lid. The engine was cold after being parked up for just over 12 hours. Is this to be expected ? Thanks for any responses.
  14. BMW 3 Series Forum - Technical Talk on the BMW E21
    Hi, I fitted a Nissens 60623A radiator to my 328i Auto Coupe, and the expansion cap screws in but doesn't seem to make a seal. I don't believe it's cross-threaded, but it hisses when I squeeze the top hose. Surely it's supposed to be airtight? I've tightened it as much as I dare, and it was...
  15. BMW 3 Series Forum - Technical Talk on the BMW E46
    Hi All Im sure this has probably been covered elsewhere but cant find this specifically. I had a cracked expansion tank in my 323CI. Replaced it without much bother, bled the system through and took it for a test drive. The engine temperature is good holding steady at about 12oclock on the...
  16. BMW 3 Series Forum - Technical Talk on the BMW E46
    Hi all, Does anyone happen to know what size the O ring is in the bottom of the radiator expansion tank? 22 x 3.5 keeps cropping up on forums, but I'm sure there was two in there but can't remember for sure? Ever since I replaced the tank a few years ago it has given me grief from time to time...
  17. BMW 3 Series Forum - Technical Talk on the BMW E46
    Only had this car around six weeks now, and for the first time the other day, the coolant light came on. Now, I have a receipt for Expansion Tank and Thermostat fitted 2 years ago (approx 12k miles). And I have another that looks like it says 'Head Tank'(?) + Coolant a year later (£50 charged...
  18. BMW 3 Series Forum - Technical Talk on the BMW E21
    Posted this in the wrong area by mistake :sarcastic Hi all, just wanted to see if anyone might have any ideas on this. I am currently in the process of removing my fuel tank and I cannot for the life of me figure out how to disconnect the expansion tank hoses on the driver's side. The clamps...
  19. BMW 3 Series Forum - Technical Talk on the BMW E46
    I've got an E46 320d touring, Y-reg (2001), with the 136bhp engine. It's just started leaking coolant (0.5L a week). I've not had a proper look yet, but I can already see that the radiator is bowed and has some blue/green stains on it. I assume it's that, but may be the expansion tank too. Can...
  20. BMW 3 Series Forum - Technical Talk on the BMW E46
    Recently I bought the car mentioned above and have noticed a lot of white smoke from the exhaust pipe and bubbling and white foam in the expansion tank. Anyone any idea of what this is?? Thanks!
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