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  Topic Review (Newest First)
June 8th, 2019 21:31
lightsgoupdown Anyone save these images?
July 15th, 2017 10:42
Doc Brown Great Great post thank you. I did not feel like removing the dash as I don't think I could get it back together. For those of you like me I found a shortcut. Remove the glove box lid and basket so you can get at the pin on the right side. Then work to remove the diffuser out of the dash. Took some juggling but I got it out. I then put the half Velcro on the inside of the tube to hold the flap permanently open. I will never close it so I am OK with this.
September 28th, 2016 18:17
Abesdub that 2 pound mini sledge hammer is for smashing the piss out of the vent if all else fails
September 28th, 2016 16:20
JWSMR2 I have the same problem with my center vent! If I run the AC fan on high, the vent pops shut.

Thanks for taking your time to post this very useful tip. Now to just do it.

By the way, when do you use that 2 pound hammer?
November 24th, 2008 09:23
Xhermes Mmm I need to do this..
March 12th, 2007 11:40
Toyo Kogyo Thanks for the write up sam. Its good to actually see something useful in this sub section!!
March 11th, 2007 23:07
samweber Reinstall the flap and make sure it is seated and operates properly.

Finally, reinstall the air deflector unit. Use the feeler as shown to get the inside tab past the front face of the vent body.



Here?s the finished product. Make sure not to over tighten the mounting screws when reattaching the vent to the dash. Enjoy.

March 11th, 2007 23:05
samweber Once the tabs are released, remove the thumbwheel as shown.



Now that the vent is completely disassembled, clean it thoroughly.

Now for the repair. Cut a small piece of the felt side of some self-adhesive Velcro as shown.



Attach the Velcro to the vent body as shown.



Now, reinstall the thumbwheel. A small bit of prying may be needed but it is nowhere near as difficult to install as it was to remove it. Now the repair should look like this.



Continued...
March 11th, 2007 23:02
samweber The flap can be jiggled out of the vent body from here without much drama. Here?s a shot of the removed flap so you can see the seating pins on either side.



Now for the bonus round. It?s time to remove the thumbwheel.

Here?s what the thumbwheel looks like when it?s removed.



The thumbwheel is held in place by plastic tabs. One tab is built into the side of the vent body and the other is built into the plastic wall that separates the thumbwheel from the air deflector. The first step is to get a feeler inserted between the vent body and the thumbwheel. Insert a small screwdriver in between the vent body and the thumbwheel and gently pry so that the feeler can be inserted to keep the tab on that side from reseating. Here?s what you have once the feeler is inserted.



Next, use a precision screwdriver to pry on the separator wall to unseat its tab from the wheel. Keep some pressure on the wheel so that when the tab releases, the wheel moves toward the rear of the vent body.



Continued...
March 11th, 2007 22:58
samweber Once you get the tab to unseat, the air deflector unit comes out the front of the vent housing as shown.



Note that the air deflector unit has felt glued to each side. On the vents I?ve worked on, these pieces of felt were in fine shape so I didn?t attempt to replace them. The purpose of these felt pieces is to keep the air deflector in the position you put it.





Now the easy part is over. The next step is to remove the air control flap from the vent housing. The flap has some flex to it. The side of the flap opposite the thumbwheel is the place to start. Coax the flap?s seating pin out of the hole in the vent body so the flap can drop down.



Continued...
March 11th, 2007 22:54
samweber I have seen these screw posts repaired with epoxy but if you can find a vent with good posts, use it.

The first disassembly step is to remove the air deflection portion of the vent. The air deflector has a tab that fits into a hole in the side of the vent (see below).



Use a small screwdriver to push in the tab. The goal is to push it in far enough so that the feeler gauge can be inserted between the tab and its seating hole. The vent should look like this when you have the feeler inserted properly.



Next, the tab closest to the thumbwheel has to be pried up so it comes out of its seating hole. Here?s a picture of the tab you?ll be dealing with. The tab is inside the air deflector housing just above the thumbwheel in the picture.



Use a precision screwdriver to GENTLY pry the tab up while keeping some pressure with your fingers on the back of the air deflector unit. Here?s a picture of the technique.



Continued...
March 11th, 2007 22:50
samweber
Restoring 85/86 MKI Center Vent

This thread contains a procedure I developed for restoring the center vent on 85/86 MKI?s. The problem I?m addressing is that the air control flap won?t remain in the open position. It is easy to tell if you have this problem, even with the vent in the car. Set the thumbwheel to the full open position. If it closes as soon as you remove your thumb from the wheel, your vent needs work. Even if the flap isn?t that loose, it may close as you drive over bumps. This procedure only applies to the 85/86 vent. In 87+ models, the vent is much simpler because the air control flap is built into the heater box.

The fix for this flap problem is to install a small piece of Velcro between the vent body and the thumbwheel. This is a reversible modification since the Velcro can be removed without damage to the vent. The Velcro provides sufficient friction for the thumbwheel to hold the flap in place but does not make the thumbwheel more difficult to operate.

Removing the vent from the dash is a huge hassle. The vent CANNOT be removed from the front. The dash pad must be removed in order to get to the two screws that come in from the back. The screw posts (shown later) are extremely brittle and may break when the screws are removed.

Here are the tools needed for performing this procedure.



The precision screwdrivers and feeler gauge are needed for taking the vent apart and putting it back together. The Tuff Stuff and paintbrush are used to thoroughly clean the vent after disassembly.

Here is the vent I started with.

Front (note the thumbwheel):



Some vents will exhibit cracking on the lower face. This is due to the stress put on these areas by the screw posts. If time and budget allows, try to find a vent that doesn?t have any stress cracks.

Rear (note the flap mechanism):



Screw posts:



Continued...

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