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Air Filter Replacement


Parker

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Just purchased an AC filter to replace on my 1997 Eldorado. Instructions in owners manual say to unplug AIT (Air Inlet Temperature) sensor first. Then to loosen clamp and remove duct prior to unclipping air box to lift forward to access the old air filter. Well, after loosening the clamp it is impossible to remove the duct. It is as if the duct is permanently glued into position. Loosening the clamp doesn't at all loosen the duct. Yanked and tugged with no effect. Am I doing someting wrong?

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Here's what I do:

1) Unplug the air temperature sensor.

2) Undo both air filter housing clips. There's one in the right rear corner (looking at it from the front of the car) and there's also one on the left edge, just under the coolant hose.

3) Loosen both large hose clamps on the duct...there's on at the filter housing and one attaching the duct to the mass air flow sensor.

4) Using both hands, grasp the duct right near the mass air flow sensor, like you're going to...for lack of a better word, strangle it. Twist back and forth, just to "break it loose" from the mass air flow sensor. You probably won't be able to actually remove it, but you want it to be able to rotate easily.

5) Being careful not to let the clip under the coolant hose to gouge the hose as you lift, carefully lift up on the back of the air filter housing and try to rotate it toward the front of the car. There are tangs on the front of the housing lid that are engaged with the housing itself, so you won't be able to simply lift it straight up.

6) Here's where a small screwdriver comes in handy. As you're lifting up on the back edge of the housing lid, the duct is going to pick up with it, but try to resist you pulling it up, because it's still connected at the mass air flow sensor. Use a small screwdriver to "pry" the duct off the filter housing as you lift up. The idea here is to tear the housing lid and the duct away from each other.

Installation is reverse of removal. Make sure the duct is connected at the mass air flow sensor, but loose so it can swivel, or rotate. Rotate the duct so it's pointing straight up, on the mass air flow sensor. Insert the tangs of the filter lid into the housing. As you rotate the lid down into place, rotate the duct down into place, so they "meet in the middle". It is a pain, and probably could be easier if it were designed a little differently.

Jason(2001 STS, White Diamond)

"When you turn your car on...does it return the favor?"

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You can flat rate 'em! release the clips, pry that mf open, wrench the old filter, wad up the new filter, and jam it in. I relase the clips, remove the resonator box, and loosen the clamps incuding the one that holds the hose on the trottle body. Based on mechanical leverage laws, it's eaiser to pull than push, so I pull the hose off the throttle body, kinda working both ends of the hose. I spent a few moments the first time I installed a filter, doing these short-cuts, not the professional one, the not loosening all the clamps and resonator. I can do it pdq, in and out, probally a little over 2 minutes. You see, I don't wrestle anything, just loosen everying up and kinda' yank the thing as a whole. Oh, I don't disconect the wire on the air flow.

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Be sure to remove the sensor and lossen the hose clamp around the intake first.

Next the air filter housing is held to the body, by two posts inserted into rubber bushings. You can lift the housing vertically by pulling on it straight up. Once you lift the box be careful to unclip the retainers holding the housing cover down. To open the housing you will need to release the clips holding the housing cover in place. Now you can replace the filter, however clipping the cover retainers to the housing may not be as easy since the filter’s seal in brand new.

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