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Old 11-11-2007, 02:10 AM   #1
nefarious7907
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Default Replacing the E30 Heater Core and Valve

This pertains to E30's with the metal pipes



This job should only take 45-60 minutes to uninstall and reinstall while goofing off and taking breaks to stretch.

You need:
1 long phillips head screwdriver
1 short phillips head screwdriver
1 standard screwdriver
1 rachet or nut driver
1 8mm socket
1 10mm deep well socket
Heater Core and or Valve
3 O-rings
Some oil for the O-rings
1 or 2 extra square nuts, your bound to drop one of these pt #07119921431 and they are like ~.31 cents each
The heater pipes are ~$10 each so you might consider those too
And some coolant to top your system back off when your done

Removal:

-Undo the two hoses that go to pipes located to the passengers side of the brake booster, and drain any coolant



-Then remove the rear console by removing the rear ash tray and removing the 8mm nut underneath it and pull your ebrake boot out and set it aside

-Now to remove the front console pry out your shift boot and pull it up so that its inside out and then pry up your window switches and disconnect them

-With the shift boot pulled up remove the 10mm nut and now is good time to remove the two phillips head screws that hold your front ash tray in place and you can disconnect the lighter.

-Then turn the standard plastic screws located at the front of your console 90 degrees to unlock them, and now you should be able to remove your console

-Next remove the floor ducting connector thing on the drivers side



-And now the air diverter above it by removing the screw shown in the picture below



-Now you will have the heater core exposed and you can undo the two screws that hold in the heater core that are diagonal from each other



-Remove the screw that goes through the clamp that holds the pipes in place its located about 2 inches away from the firewall, you can just barely see in this picture its and E shaped bracket just on the other side of the heater core valve.



-Pry the heater core out a bit and with a short 8mm wrench undo the three bolts that hold the heater core to the heater valve

-To seperate the heater core from the valve will require some prying but you should be able to push the pipes through firewall an inch or so and you will be able to slide the heater core out

- There is a 2 pin connector for the heater valve that is located on the top of valve that you need to disconnect before you can remove the valve

- Then remove the valve with the upper pipe attached and with the lower pipe still loosely in place you can remove it as an assembly.

Installation:

-Take you new heater core and install the insulation by referencing you old heater core

-Take you metal pipes and clean ends with a mild abrasive to insure a proper seal for both of heater hoses that connect on the firewall

-Install the top metal pipe with a new lightly oiled O-ring onto the heater valve and tighten the two bolts

-Intall the other two O-rings onto heater valve and lightly oil them

-Fit the heater valve back into the car by loosely installing the screw that goes through the clamp to hold the pipes in place

-Then slide the heater core 90% into place so that the top bolt would between the heater core and valve will be accessible

-After tightening all three bolts between the heater core and valve push the heater core into place and reinstall the two screws that secure it in
place

-Now is a good time to plug in the heater valve and replace the air diverter



-Go back over your nuts and bolts and make sure everything is tight and start the car and run the Heat on high for several minutes and check for leaks.

- When you verify that you are not having any leaking issue, you can replace the expandy duct connector and then front and then rear console

My heater core nor valve came with new o rings, so make sure you get those ordered.
I never looked at the bentley or any other manual before doing this.
It is all pretty self explanitory when you look at it. But sitting in your seat upside as I did does make this a bit easier if you are too lazy to remove your drivers seat. Removing the steering wheel is easy and will give you a bit more space should you choose to attack it upside down.
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Last edited by nefarious7907 : 03-01-2008 at 11:57 PM.
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Old 01-05-2008, 04:59 AM   #2
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what are the differences for e30's with non metal pipes (i'm assuming late model e30's?)


i smell coolant every time i turn my heater on
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Old 02-26-2008, 02:22 PM   #3
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just ordered my parts from Bavauto. Couldn't believe they were cheaper than BMA and free shipping if anyone is interested. Going outside in a few to drain all coolant(regular maintenance) and remove both the valve and core.
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Old 03-01-2008, 06:09 PM   #4
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damn damn damn. just got around to doing this and lost 2 of the damn hex nuts (#9) needed to be complete!! Just got back from local HW store and they don't carry them either
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Old 03-01-2008, 07:58 PM   #5
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Oops I have been forgetting to update this writeup, I have a better updated writeup on this on R3V but I still havent got around to editing the pictures and putting them in the right places next to the correct steps. But once you drop one of those nuts they are gone.
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Old 03-01-2008, 11:58 PM   #6
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Updated , although I would still like to get a few more pictures in
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Old 03-02-2008, 03:32 PM   #7
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as posted on R3v order more of #9 in the pic. You will lose them. Not one place stocks them
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Old 03-04-2008, 06:44 PM   #8
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Gah, I have to replace my heater valve soon... Hmmm, or should I just T it off, so there's no coolant going into my HVAC anymore...
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Old 03-04-2008, 06:51 PM   #9
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Quote:
Originally Posted by evil_twin View Post
Gah, I have to replace my heater valve soon... Hmmm, or should I just T it off, so there's no coolant going into my HVAC anymore...
You could just T it off, well I used a 1/2in coupler or 5/8in coupler. I did that for a couple of months before I could afford a heater core and valve $230 for the pair isnt pocket change.
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Old 03-04-2008, 09:00 PM   #10
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further setback there are only 33 items in stock for those damn square nuts in the country Can't get them untill tomorrow
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