93 wrx import HEATER MATRIX help ???
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Scooby Newbie
Joined: Apr 2012
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From: leeds
93 wrx import HEATER MATRIX help ???
hi all my mates subaru is needing a new heater matrix fitting as old one has given up .. hes been told by various people to just break the car for bits as its got a good couple grand of mods... but personally i think its FAR too good to be breaking !!! i was just wondering if anyone new how big of a job it would be to replace it ?? i understand you have to take off whole dash to access.. but after dash off is away is it an simple procedure ?? any info would be appreciated cheers 
hi all my mates subaru is needing a new heater matrix fitting as old one has given up .. hes been told by various people to just break the car for bits as its got a good couple grand of mods... but personally i think its FAR too good to be breaking !!! i was just wondering if anyone new how big of a job it would be to replace it ?? i understand you have to take off whole dash to access.. but after dash off is away is it an simple procedure ?? any info would be appreciated cheers
If your good with spanners and screwdrivers it should take a few hours max, just drain the water out before you take it off and have something to plug the pipes as it can flood your car.
Here you go.
Don`t be put off as it looks like a total mess, its pretty straight forwards.
Don`t be put off as it looks like a total mess, its pretty straight forwards.
Classic heater matrix, dash out completly. Have fun!
Remove all the centre console around the handbrake and radio.
Heater vent on top of the dash unclips to reveal 2 bolts.
Glove box needs to come out and the plastics under steering wheel.
Undo 2 bolts under the steering column to drop it down.
I took all the clocks and switchs out of the dash, including the heater controls.
Undo all the nuts and bolts you can see holding the dash in and unplug anything you come across remembering where they go!
Give it a wiggle and a nudge to get to this stage:
Remove the cross bar running between the pillars.
If you have air con it needs to be de-gassed.
Disconnect the 2 air con pipes in the engine bay that go through the bulkhead.
Back in the car unbolt the air con unit from the bulkhead and pull it out of the way. I tried my hardest to do it without draining the aircon but there is no way the heater box is going to come out without doing it.
In the engine bay remove the heater matrix hose's that go into the bulkhead.
You may need to remove the intercooler to get down there.
Back in the car unbolt and remove the heater box.
Your car should look like this:
Remove the matrix out of the heater box and put the new one in.
All you need to do then is put it back together. Fill the matrix with water before putting the hoses back on under the bonnet which makes it easier to get any air locks out of the system.
Took me a day to do mine.
I may have missed something but thats the way i do it.
Remove all the centre console around the handbrake and radio.
Heater vent on top of the dash unclips to reveal 2 bolts.
Glove box needs to come out and the plastics under steering wheel.
Undo 2 bolts under the steering column to drop it down.
I took all the clocks and switchs out of the dash, including the heater controls.
Undo all the nuts and bolts you can see holding the dash in and unplug anything you come across remembering where they go!
Give it a wiggle and a nudge to get to this stage:
Remove the cross bar running between the pillars.
If you have air con it needs to be de-gassed.
Disconnect the 2 air con pipes in the engine bay that go through the bulkhead.
Back in the car unbolt the air con unit from the bulkhead and pull it out of the way. I tried my hardest to do it without draining the aircon but there is no way the heater box is going to come out without doing it.
In the engine bay remove the heater matrix hose's that go into the bulkhead.
You may need to remove the intercooler to get down there.
Back in the car unbolt and remove the heater box.
Your car should look like this:
Remove the matrix out of the heater box and put the new one in.
All you need to do then is put it back together. Fill the matrix with water before putting the hoses back on under the bonnet which makes it easier to get any air locks out of the system.
Took me a day to do mine.
I may have missed something but thats the way i do it.
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