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Heater Core Replacement

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  • #31
    Done a bit of research. I think aliminium pipe = aircond, plastic pipe = non-aircond.

    Does that sound right ?

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    • #32
      Certainly true in my case - I did this job 2 weeks ago.

      Good tip on removing the air-duct above the heater matrix. When you separate the pipes from the matrix be careful not to lose the captive nuts.

      Once you've disconnected the hoses from the engine bay, disconnect the pipes from the matrix and then push them back toward the firewall - the heater matrix will then slide out. Mine went pop so I didn't have fluid to worry about - everything was soaked so the carpet had to come out, but if I did have fluid in the system I'd use a babies nappy cut up or something very absorbant.

      It's not a tough job if you take the driver's seat out first (which let's face it takes no time at all).

      These are the parts I used:

      1 x B64.11.8.391.363 Heater Matrix 119.55
      1 x B64.11.1.386.707 Electric Water Valve (kinked pipe) 122.01
      3 x B64.11.8.377.824 O Ring Seals 2.87

      Cheers,

      Dave.

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      • #33
        How much time is required to do a complete job? I asume that all of our cars need this done as a proactive age based replacement.

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        • #34
          Originally posted by PhilWalter View Post
          Done a bit of research. I think aliminium pipe = aircond, plastic pipe = non-aircond.

          Does that sound right ?
          Yes, so since all US spec M3's had AC, we have the aluminum pipes which I hear is easier to swap the heater core than the non ac type. The job isn't too bad...maybe an hour or so if you take your time.

          88 M3 - LACHSSILBER/M TECH
          89 M3 - ALPINEWEISS II/SCHWARZ
          85 323I S52 - ALPINEWEISS/SCHWARZ
          91 M TECHNIC TURBO - MACAOBLAU/M TECH


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          • #35
            Cheers - yeah I have Euro spec, so my pipes are plastic. Cooland not leaking onto carpet luckily so don't have to worry about that :-)

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            • #36
              Originally posted by PhilWalter View Post
              Cheers - yeah I have Euro spec, so my pipes are plastic. Cooland not leaking onto carpet luckily so don't have to worry about that :-)
              ohhh I think the job is much more involved for the plastic pipes.

              post at r3vlimited

              Does your car also not have AC? I think you might not be able to remove/install the heater core without hitting the steering column which leaves you two options, both painful.

              Remove dash and the whole heater box assembly
              or
              Drop the steering column and pedal box.

              -chris
              1988 M3
              2007 Lotus Exige S

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              • #37
                My car is Euro Spec but has AC and Aluminium pipes.

                The hardest part of the job I reckon is removing and replacing the hoses from the engine bay which you have to do if you're replacing the valve - with a Carbon Airbox the job is a dream (remove Airbox takes 5 minutes if you take your time); doing it with std airbox I guess will be nasty.

                Interior work One Hour top - in and out.

                Remove Seat,
                Remove Lower Dash trim from below streerring wheel
                Remove centre console forward section
                Remove Air Vent (one screw + clip at back)
                Remove screws on heater matrix
                Remove screws holding aluminium pipes to matrix (x3) don't lost the nuts.
                Once the aluminium pipes are free - push the whole lot back into the engine bay and remove the matrix.

                If you are repacing the valve (and you should) you'll need to disconnect the hoses from the engine bay and the plug on top of the valve.

                It's not a hard job.

                Dave.

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                • #38
                  Anyone know the size of the heater core hoses going in and out from the engine firewall?
                  Thanks!
                  88 M3 DS 89 M3 Zinno

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                  • #39
                    Inlet hose 64211370807 coming from the Heater By-pass. Outlet hose 64211381541. If you are going to replace the inlet hose, you might as well replace the hoses on the Heater By-pass. BTW, I have a spare fire wall rubber grommet if you intend to replace yours. I double ordered on this item. I might as well kept it instead of sending it back to Tischer.
                    Attached Files
                    Last edited by Das Boots; 03-28-2011, 03:39 PM.
                    Lawrence

                    BMW CCA San Diego Chapter #192742
                    '90 M3 AWII - Garage Queen
                    '09 540i Touring 6 Spd - Son's DD
                    '03 530i 5 Spd - SO's DD
                    '03 Nissan Frontier Crew Cab - My DD & Range truck
                    '05 330i ZHP 6 Spd - Alternate DD
                    '15 Honda Pilot - Daughter's & Grandkids Hauler

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                    • #40
                      LAST CALL!
                      Any OC,CAL M3 owners wanna help out your Pal Archie with this job. I am located in The City Of Orange.
                      I have lots of cold beer in the fridge.:gotcha:
                      88 M3 DS 89 M3 Zinno

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                      • #41
                        89 M3.
                        Dont think it's the heater core that blew and leaked. I think its the seal from where the valve attaches to the core.
                        But I'm changing the core also while I'm at it.

                        88 M3 DS 89 M3 Zinno

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                        • #42
                          That is where the O-Rings are supposed to go......be careful do not lose those screws and square nuts that hold the flange together. GL.
                          Lawrence

                          BMW CCA San Diego Chapter #192742
                          '90 M3 AWII - Garage Queen
                          '09 540i Touring 6 Spd - Son's DD
                          '03 530i 5 Spd - SO's DD
                          '03 Nissan Frontier Crew Cab - My DD & Range truck
                          '05 330i ZHP 6 Spd - Alternate DD
                          '15 Honda Pilot - Daughter's & Grandkids Hauler

                          Comment


                          • #43
                            what tool did you use Lawrence to take those screws off?
                            Just curious cuz I cant really see the top of them?
                            Last edited by archie; 04-02-2011, 04:57 PM.
                            88 M3 DS 89 M3 Zinno

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                            • #44
                              The HC has to come out a little bit so as you can get the screws in the back of the flange. Don't forget that overhanging vent...it has to come out. I screw and pop out the vent by compressing the sides. Philipps is what I used...if I remember. Then you can get the bottom and the side. The pipes, HC Valve & outlet pipes are notched. They can & will only go one way. Don't forget to loosen the bracket strap that hold the pipes in place. And when you are done replacing all, you will have the biggest smile and be so happy that you will say, "I did it." And will probly say, 'it was not that hard, after all.'
                              Last edited by Das Boots; 04-02-2011, 05:06 PM.
                              Lawrence

                              BMW CCA San Diego Chapter #192742
                              '90 M3 AWII - Garage Queen
                              '09 540i Touring 6 Spd - Son's DD
                              '03 530i 5 Spd - SO's DD
                              '03 Nissan Frontier Crew Cab - My DD & Range truck
                              '05 330i ZHP 6 Spd - Alternate DD
                              '15 Honda Pilot - Daughter's & Grandkids Hauler

                              Comment


                              • #45
                                Originally posted by Das Boots View Post
                                The HC has to come out a little bit so as you can get the screws in the back of the flange. Don't forget that overhanging vent...it has to come out. I screw and pop out the vent by compressing the sides. Philipps is what I used...if I remember. Then you can get the bottom and the side. The pipes, HC Valve & outlet pipes are notched. They can & will only go one way. Don't forget to loosen the bracket strap that hold the pipes in place. And when you are done replacing all, you will have the biggest smile and be so happy that you will say, "I did it." And will probly say, 'it was not that hard, after all.'

                                I hope so on your last sentence. ha!!!

                                Thanks again
                                88 M3 DS 89 M3 Zinno

                                Comment

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