Below are some installation tips helpful for Gamiviti products.
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Roof Rack removal
Prior to installing your rack you must first remove your old one. This is a well-documented process and you should be able to easily find info on this specific to your vehicle, here are a few tips we have found to be most relevant and worth adding here.
Squirt penetrating oil onto the screw heads for several days prior to removal. Once removed, you can put smaller bolts back into those same holes, using some silicone (see below) and rubber sealing washers. You only have to remove the long raised rails on the sides, you don't have to remove the thinner rails that are secured to the roof in the center. On the 80 series, if you're running 45 degree towers you actually don't have to remove anything, however it makes using your new rack a little easier if you get that old one out of the way, regardless of the fact that it will clear it. Looks better too to just have one rack.
You will need to find a T-30 Torx driver. You won't use those bolts again, and you may not ever use that T-30 tip again... chance you got one with that cheap set of screwdrivers and/or drill attachments you bought.
on LX models, they didn't put a bolt in the forward location of your center towers. So there is going to be a bunch of dirt in there... when you get the rack off, squirt some lube in there, then run a bolt down with nothing on it. better yet, run a M8 x 1.25mm tap down there to clean those threads up, otherwise it's possible to bugger this one up when you install the rack.
The 1" wide rubber strip can stay on, if you are going from a 3-tower per side factory rack to a 3-tower per side Gamiviti rack. But it won't keep all the needles and water out of that channel, there will be a gap around the towers. So we think it's better to just pull that rubber thing off, regardless of rack, that way you can visually inspect what's going on up there periodically, and keep the area clean.
Probably the best tip on removal is go slow, and slowly ease out both bolts at the same time. Inside your roof is a little backing plate with 2 nuts on it, held in place by these little plastic sleeves around the bolts, and a small retainer clip. If you are too aggressive with a bolt (like pushing down) you can dislodge that plate, then it will be swimming down in space below your roof above the headliner. This isn't the end of the world, but it can slow down the process.
To deal with a plate that has come loose, first remove all tower stuff completely so you have a clean roof surface. Then take one of the M8 bolts and try to thread it into one of the nuts- you may need to run to the store to buy an even longer M8 bolt if it's way in there, or possibly use a poker (coat hanger, skinny screwdriver, etc) to move it around, again the thread is M8x1.25 if you need it. But once you get one side started, you can use that bolt as a handle to get the other side into view, at which time you thread another bolt in there. The goal is to have bolts in both sides, then add the tower.
So once you have bolts in both sides, remove one of them, then reinstall the bolt now running through your tower. Once one side is started, then do the other side, then slowly work both bolts in until the tower is secure.
The 1" wide rubber strip really has nothing holding it on. It was smashed in place by the factory towers, but with those out it will just fly off if you don't remove it now. Most people don't try to retain those, instead just run a clean channel.
Roof rack installation
Here is a photo showing the channel tower setup for a basic rack setup. Note that the middle towers do not have a small 1/4-20 bolt.
Start by putting the towers together, see the above picture for a guide. The front towers do the 3rd highest setting, the back do the second highest, that's a good start. The middle don't use the center height bolt, just put it together as low as it will possibly go. Note how the front tower has the top that goes in front of the bottom, while the back tower has the top part behind the bottom, that's to help compensate for the taper of your roof.
Bolt all the towers to the rack, using a little silicone on the bolt holes. If you don't have the stock rubber pads, you can use some rubber washers between the roof and tower. Only finger tighten the towers, just in case you need to slide one. Here's a picture of a good silicone to use:
Once the towers are in place, have someone help you lift the rack in place, and put all the top bolts through, the whole thing should be very symmetrical. To tighten, do the top bolts first, then the center tower bolts, then the bolts that attach the towers to the roof (or clamps, if using rain gutter towers). Last thing to tighten is those 4 height adjusters (channel towers only). Note there are only 1/4-20 bolts supplies with the channel towers, they are used in the far corner towers only to set your height.
Fairings come in one size, and pre-drilled for a variety of applications. You won't use all of the holes.
For bolt-on fairings, use 4 pipe clamps across the top of the fairing, to secure to the main hoop of the roof rack. The other two clamps install on the lower Expo bar, spaced about 12" from the center. These lower clamps do not need to be bolted through the fairing, they are mainly there to prevent vibration. One tip is to twist & force the fairing into the lower clamps while tightening the tops, to give the fairing a little more down force, however generally the oncoming wind is all you need here. If desired, you can drill holes through the fairing to secure the lower clamps, but this is generally not necessary.
80, 100, and 200 series fairings with the snap-on attachment will bolt theirs up in this configuration... if you have the drop-down feature for the light bar, you will use the lower center hole. If you do not have the drop-down, you will use the higher center hole. Use your hand to bend the clips to achieve a tighter or looser grip to the rack. Same notes apply for the 120 series.
The center clip of a snap-on fairing may contact your roof, depending on the height you have set your rack. Be sure to inspect that center clip, if necessary you can grind a little bit of it off to gain more clearance. Try to get at least a 1mm gap between the clip and rack, and inspect this area periodically to make sure there isn't any contact. Here are photos of that clip after it has been ground down, and the resulting gap below it.
120 Series fairings with the snap-on attachment will bolt theirs up in this configuration... note 2 additional holes are required, for the outer clamps on the bottom.