mehr Bilder, server ist allerdings sehr langsam
http://www.tntcomp.com/tim%20s/heatercore.htm
http://www.bimmerboard.com/forums/posts/427855/
http://www.bimmerboard.com/forums/posts/418296/
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heater core replacement DIY
didn't document with photos but in case anyone wants to tackle the heater core replacement, here are some instructions. Perhaps it will be good for the archives at any rate. I, of course imply no guarrantees of success and take no responsibility for your peril (I'm not a lawyer). But seriously, it's not too hard.
Tools: Philips #1 and #2. Socket or wrench 8 or 9mm and 13mm. Small straight blade screwdriver for prying. Flashlight.
1. Pry off vertical black strips to right and left of center black console housing the radio, etc to reveal screws.
2. Pry off wood dashboard strips below instruments to reveal screws.
3. Remove drivers lower dash panel via 6 screws
4. Open/lower glovebox (can keep attached by straps).
5. Remove shifter knob, leather boot surround, wood surround (reach hand in and pop up forward edge, slide forward and up (towards ash tray) to clear tabs at edge of wood closest to you).
6. Remove rubber and foam around shifter rod.
7. Pry off color-coded cap from screw at junction of front and rear consoles (where center recess is between arm rests).
8. Unscrew said screw.
9. Pry off leather parking brake surround and lift up a little.
10. Unscrew screw at bottom of opening around parking brake which holds down driver's side of front console to rear console.
11. Pry off rear black panel where rear airducts are located.
12. Use 8 or 9mm socket to unscew two side bolts holding rear console in place (I couldn't easily budge the 2 phillips screws but this is an alternate).
13. With rear console free, slide it back 5 inches but don't need to lift up.
14. Using 8-9 mm socket, unscrew black plastic bolt holding rear of front console in place on a ridged plastic tab.
15. Up front, unscrew single phillips screw holding small carpet piece along right and left sides of transmission tunnel (e.g. near accelerator pedal) and slide piece of carpet forward and lift off.
16. Unscrew black phillips screw holding front bottom of center console to a brass metal tab on both sides.
17. Unscrew any of the four remaining screws at black plastic console holding radio, climate control, etc., revealed in step #1
18. Attempt to free the front center console. The window switches need to be pried up and disconnected along with the hazard switch. I don't have ASC but this switch, if present, should be disconnected. Un plug white connector holding wires to cigarette lighter.
19. Try to swing upper center black console containing radio to the right. As you do so, disconnect radio wires, climate control cables, and climate control wires. Look at how connectors come off carefully; one has a small lever that needs to be pulled which helps eject it. I didn't disconnect the computer but this could also be done.
20. Swing this assembly to the right and balance on open door of glove box (don't scratch your wood - use a protective paper, cloth, etc.
21. Revealed is now a big black plastic enclosure to the heater core. Disconnect temperature wires at white connectors on each side.
22. Unscrew two phillips screws at front base of enclosure.
23. Un-bolt two shock absorbing mounts at base of front enclosure.
24. Remove 10 clips holding enclosure back (facing you) to the front half. The clips at driver's side may be tough to spot and access due to the obvious wires and metal support rod, but this is "do-able".
25. Clip tie wraps holding t-shaped wire loom in front of enclosure and push this and climate control cables up, out of your way.
26. Remove enclosure panel. Start at passenger side and pull towards you, then slide to passenger side and free driver's (left side) from behind wiring etc.
27. Now you see heater core!
28. Un-screw each of three pipes slowly and make sure paper towels are on hand. I didn't drain coolant and did lose 1/4 cup from top of core and pipes, but that's all. Make sure towels soak up any draining coolant and not your carpeting.
29. carefully bend/move passenger element pipe torwards you to make room for removing core (just a little).
30. Core is only held in place by the three pipes. Pull top of core forward torwards you and lift out of dashboard.
31. Clean plastic box well.
32. Have three new washers on hand for attaching new core and pipes.
33. Test the new core to rule out leakage by reattaching the climate control and running the car.
34. Assembly, is, well reverse of above.
35. Bleed the coolant system.
I hope I haven't missed anything. Good luck.
Using these instructions, and putting everything into its own numbered plastic bag took me only 2h 15 mins to get to the core, and about the same amount of time to put everything back together.
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