xjguy98
NAXJA Forum User
- Location
- Belleville, Ontario
CONTUNUED FROM PART 1...
5) Between the evaporator tubes and heater core tubes, you'll see a small vacuum hose. Disconnect it from the tee-fitting.
6) This is the biggest pain I found for this entire job. Removing the five mounting nuts. You'll find one just outboard of the blower motor. The next two are holding the accumulator mounting bracket to the firewall. The next one is just to the right of the engine centerline and above the valve cover (on the firewall, looking forward) and the WORST is about 6" below it behind the cylinder head. I was able to use a 7/16" socket for the first four but the bottom one I had to use a long box end wrench and turn it a little at a time. Be very careful not to drop it as it'll end up on the bellhousing and you'll never get it back.
Here you can see two of the five mounting points as well as the tee fitting for the vaccum line (top right):
7) After you are able to remove the five mounting nuts, go back inside and gently pull the entire HVAC box rearward to clear the studs/drain hose from the firewall. This is what you should end up with:
Almost there....
Gone....
Now it's time to break the box down and actually do what we set out to do. Replace the evaporator or heater core.
1) Unplug the vaccum lines from the floor door actuator on the lower left side of the box as well as unplug the vaccum line from the recirc door actuator on the right side.
Floor Door Actuator:
Recirc Door Actuator:
2) Disengage any vaccum line from any clips on the lower half of the housing.
3) Disengage the blower motor harness and relay from their holes in the upper half of the housing:
4) Unplug and remove the blower motor from the housing
5) Remove the foam seals from the blower motor surround and the evap/heater tube surround. I bought new seals ($60) so I didn't care what the old ones turned out like but I'm sure with patience, a heat gun and a scraper you could salvage both.
6) Pop off the two snap clips on the left forward side of the housing and remove the 14 screws securing the two halves.
7) After making sure everything is disconnected/removed, carefully lift the top half off the bottom half. It might take a bit of coaxing but it should come off easily enough. Set the top half aside.
This is what I was left with. Looking down on the bottom half of the housing:
And this chunk of foam is what sat under the evaporator....nicely rotted away
8) After the two halves are apart, simply lift the old evaporator and heater core out of the housing. When replacing either or both of these, all the foam rubber seals need to be transferred over to the new part. Be careful when taking them off because I don't know of any part numbers for them.
5) Between the evaporator tubes and heater core tubes, you'll see a small vacuum hose. Disconnect it from the tee-fitting.
6) This is the biggest pain I found for this entire job. Removing the five mounting nuts. You'll find one just outboard of the blower motor. The next two are holding the accumulator mounting bracket to the firewall. The next one is just to the right of the engine centerline and above the valve cover (on the firewall, looking forward) and the WORST is about 6" below it behind the cylinder head. I was able to use a 7/16" socket for the first four but the bottom one I had to use a long box end wrench and turn it a little at a time. Be very careful not to drop it as it'll end up on the bellhousing and you'll never get it back.
Here you can see two of the five mounting points as well as the tee fitting for the vaccum line (top right):
7) After you are able to remove the five mounting nuts, go back inside and gently pull the entire HVAC box rearward to clear the studs/drain hose from the firewall. This is what you should end up with:
Almost there....
Gone....
Now it's time to break the box down and actually do what we set out to do. Replace the evaporator or heater core.
1) Unplug the vaccum lines from the floor door actuator on the lower left side of the box as well as unplug the vaccum line from the recirc door actuator on the right side.
Floor Door Actuator:
Recirc Door Actuator:
2) Disengage any vaccum line from any clips on the lower half of the housing.
3) Disengage the blower motor harness and relay from their holes in the upper half of the housing:
4) Unplug and remove the blower motor from the housing
5) Remove the foam seals from the blower motor surround and the evap/heater tube surround. I bought new seals ($60) so I didn't care what the old ones turned out like but I'm sure with patience, a heat gun and a scraper you could salvage both.
6) Pop off the two snap clips on the left forward side of the housing and remove the 14 screws securing the two halves.
7) After making sure everything is disconnected/removed, carefully lift the top half off the bottom half. It might take a bit of coaxing but it should come off easily enough. Set the top half aside.
This is what I was left with. Looking down on the bottom half of the housing:
And this chunk of foam is what sat under the evaporator....nicely rotted away
8) After the two halves are apart, simply lift the old evaporator and heater core out of the housing. When replacing either or both of these, all the foam rubber seals need to be transferred over to the new part. Be careful when taking them off because I don't know of any part numbers for them.
