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RX7 FD 1993 Leak under dash - blower motor

Old 02-11-19, 06:24 AM
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RX7 FD 1993 Leak under dash - blower motor

Hello Guys,

So i am having a issue with water getting in via passenger foot well (RHD), seen other posts but not what my issue could be.

I have removed the ECU, blower motor, glove box and air con rad plastic cover.

Aircon is broken and not the drain tube leaking, the leak is pooling in the blow motor and dripping out. I removed the blower motor and water is running down the wall of the blower box and out.

IF i pour water over the window/door/sunroof it drips from the blow box.

So water is making it inside the car, removed the plastic cowl from the bottom of the window and all looks fine.

Basically what would you guys recommend i check. I would love to remove the blower white box fully but not able to get it out, thing the dash needs to be removed.

Going to try and remove the aircon rad box as its not connected, so advice on that would be good as i would maybe able to see above the blower box.
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Old 02-11-19, 09:06 AM
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I think you have to remove the AC box first then you can remove the blower. Both are removable with the dash in the car, you will need some long extensions to get to the 10mm nuts at the very top but it's quite doable.

If I remember right, the opening to bring fresh air into the blower unit has a lip that keeps water from going in. If there are leaves and junk built up around there or the drain is blocked that could be the root of the problem.

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Old 02-12-19, 04:21 AM
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Originally Posted by DaleClark View Post
I think you have to remove the AC box first then you can remove the blower. Both are removable with the dash in the car, you will need some long extensions to get to the 10mm nuts at the very top but it's quite doable.

If I remember right, the opening to bring fresh air into the blower unit has a lip that keeps water from going in. If there are leaves and junk built up around there or the drain is blocked that could be the root of the problem.

Dale
Thanks Dale, knowing it was possible took it all out last night, was a pain too. You are correct in that the box covering the AC unit needs to be removed, at least the bottom end of it.

So a little heads up if someone is looking into this and gets stuck - above the AC box, to the top and left set about 3" back is a 10mm bolt if you want to fully remove the AC black box. I removed this with a flexible extension bar (its a tight space). The box once AC unit is removed will drop down and at angle.

Regarding the blower unit, the last 10mm bolt is high up, almost directly behind the passenger vent. I found removed the edge trim on the dash, the cap on the end with the vent in. It just pulls off and with a 6" inch extension and deep 10mm socket, can get to it.

Should add, found the leak and tbh i didn't need to do all this to fix it as it turns out. However I was removing my AC unit as have a removed the full system and my blower was full of leafs and crap that made a right noise.

So the leak, it was the plastic clips up top that you use to screw down the wiper cowl. Water was getting around them and dripping in, I will take a photo tonight from the underside. Just purchased some car window sealant and going to go around all the plastic clips to stop it.

As dale starts there is a lip around the opening for the air to be drown it, so any water will not come in, however if you look at your wiper cowl, the two screws to the right, the mounts for these are directly above the blower opening, so the water can bypass the lip.
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Old 02-12-19, 09:02 AM
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Interesting find! I wonder if that was something that was changed in a later production date or if there was sealant there that broke down.

Dale
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