Coutesy of OZTuscani
Tools Needed:
Pliers
Ratchet
10mm Socket
12mm Socket
Rags and/or disposable cup
This DIY assumes you have already removed the Throttle Body (which I covered in a different DIY). This will cover everything you need to do to install a Stage 1, 2, 3, etc.. Intake Manifold This DIY (Upper Intake portion) can also apply to anyone just replacing the plugs or wires!
UPPER INTAKE MANIFOLD REMOVAL
Remove the 2 – 10mm bolts from the throttle cable brackets, the 2 – 10mm bolts from the hose brackets, & 10mm bolt from the ground strap connected to the firewall.
Using pliers compress the clamp and remove the vacuum line (#1) and then remove the fuel line (prepare for some fuel to spill) (#2). Remove the Grey hose with Red stripe from the Intake (may need to pry loose) (#3), Disconnect wiring harness) (#4).
Now go around to the rear of the intake, using pliers remove the brake booster vacuum hose. Remove the 3 – 10mm bolts holding the throttle linkage brackets to the rear of the intake. The Blue wires in my pic are from my ground wire kit (you may not have these).
Next, disconnect the wiring harness by pressing in the retainer ring and pulling. Now that the throttle bracket is loose you can leave it hang or remove the wire loom clips from it so you can get it out of the way (recommended). There are 3 plastic tabs poking through the bracket (only 2 shown in pic), just pinch them with pliers and push them back through the holes. Now you can swing the throttle cable assembly up under the windshield wiper. It takes a little bit of work, but makes the next part easier!
Now you need to remove the 3 – 12mm bolts from the bracket on the rear of the intake. You can see 1 of the bolts in the photo, another in the middle, and 1 on the other end. You will have to do some of this by feel as you cannot easily see them.
Now you can remove the remaining 5 bolts and 2 nuts (all 12mm) connecting the upper and lower intake.
You should now be able to lift the intake directly up and off the engine. Remove and inspect the gasket & replace if needed. If you are replacing the intake, make sure you have removed any fittings which may not come with your new one! At this point I recommend covering up the open holes so you cannot drop anything into them.
LOWER INTAKE MANIFOLD REMOVAL
First we need to remove the fuel injector rails. Start by removing the 2 - 10mm nuts from the hose and bracket on the right end of the front rail. Pull the hose and bracket away from the rail (watch for spilling fuel).
Next, disconnect the grey wire harnesses from all 6 injectors. Now remove the 4 – 12mm bolts holding the fuel rail to the lower intake. CAREFULLY lift the fuel rails up off the lower intake. The injectors are just held in by o-rings so they pop right out. Set the rail assembly aside somewhere well protected (covered would not be a bad idea either), until you are ready to reinstall.
Now all that’s left is to remove the 8 – 12mm nuts and lock-washers holding the lower intake on. Be careful not to drop anything into the injector holes!
If you are not ready to reinstall the intake immediately, you may want to consider covering the port openings in the heads. You do not want to drop anything down there!
REINSTALLATION - LOWER INTAKE
Before we begin, remove any tape or other coverings you may have used to protect the open head ports. Next make sure your gaskets are installed (these gaskets can be reused since they are steel). Now set the lower intake down onto the studs (IMPORTANT! It is possible to install the lower intake backwards, so make sure it goes on the same way it came off) and install the 8 – 12mm nuts and lock-washers holding the lower intake on. Be careful not to drop anything into the injector holes! Factory torque specs these bolts is 14-15lb.ft.
Now CAREFULLY install the fuel rails onto the lower intake, making sure the injectors are all seated. Next, reinstall the 4 – 12mm bolts holding the fuel rails to the lower intake (the 2 - front rail holes also hold the brackets for the injector wiring, make sure they are in place before tightening). Factory torque specs on these bolts is 7-11 lb.ft.
Finally, reconnect the grey wire harnesses to all 6 injectors.
Now we need to reinstall the 2 - 10mm nuts with the fuel hose and bracket on the right end of the front rail. Once that is done the lower intake install is compete!
REINSTALLATION - UPPER INTAKE
First, be sure to reinstall any fittings you may have removed from your upper intake.
Now we are ready to install the upper intake, first make sure the gasket is in place (this is a steel reusable on as well). Now place the upper intake on to the lower intake and reinstall the 5 bolts and 2 nuts (all 12mm) connecting the upper and lower intake. Factory torque specs on these are 11-14 lb.ft.
Next reinstall the 3 – 12mm bolts that attack the black bracket to the rear of the intake. You can see 1 of the bolts in the photo, another in the middle, and 1 on the other end. You will have to do some of this by feel as you cannot easily see them.
The attached intake should look like this:
Now we go to the throttle bracket assembly. If you removed any of the 3 wire loom clips from the bracket, be sure to reattach them. Now reinstall the 3 – 10mm bolts holding the throttle linkage brackets to the rear of the intake (#1). Now you can reconnect the wiring harness to the back of the intake (#2). Lastly, using pliers reinstall the brake booster vacuum hose (#3).
Now go around to the driver’s side of the intake. Several things need to be reconnected here: Using pliers reinstall the vacuum line (#1), reinstall the fuel line (#2). Reinstall the Grey hose with Red stripe to the Intake (#3). Finally, reconnect injector wiring harness) (#4).
Now all you need to do is reinstall the 2 – 10mm bolts from the throttle cable brackets, the 2 – 10mm bolts from the hose brackets, & 10mm bolt from the ground strap connected to the firewall. Finished product should look like this!
Now you can proceed to my Throttle Body DIY if you need to reattach it.
Enjoy
-Ryloth
Tools Needed:
Pliers
Ratchet
10mm Socket
12mm Socket
Rags and/or disposable cup
This DIY assumes you have already removed the Throttle Body (which I covered in a different DIY). This will cover everything you need to do to install a Stage 1, 2, 3, etc.. Intake Manifold This DIY (Upper Intake portion) can also apply to anyone just replacing the plugs or wires!
UPPER INTAKE MANIFOLD REMOVAL
Remove the 2 – 10mm bolts from the throttle cable brackets, the 2 – 10mm bolts from the hose brackets, & 10mm bolt from the ground strap connected to the firewall.

Using pliers compress the clamp and remove the vacuum line (#1) and then remove the fuel line (prepare for some fuel to spill) (#2). Remove the Grey hose with Red stripe from the Intake (may need to pry loose) (#3), Disconnect wiring harness) (#4).

Now go around to the rear of the intake, using pliers remove the brake booster vacuum hose. Remove the 3 – 10mm bolts holding the throttle linkage brackets to the rear of the intake. The Blue wires in my pic are from my ground wire kit (you may not have these).

Next, disconnect the wiring harness by pressing in the retainer ring and pulling. Now that the throttle bracket is loose you can leave it hang or remove the wire loom clips from it so you can get it out of the way (recommended). There are 3 plastic tabs poking through the bracket (only 2 shown in pic), just pinch them with pliers and push them back through the holes. Now you can swing the throttle cable assembly up under the windshield wiper. It takes a little bit of work, but makes the next part easier!

Now you need to remove the 3 – 12mm bolts from the bracket on the rear of the intake. You can see 1 of the bolts in the photo, another in the middle, and 1 on the other end. You will have to do some of this by feel as you cannot easily see them.

Now you can remove the remaining 5 bolts and 2 nuts (all 12mm) connecting the upper and lower intake.

You should now be able to lift the intake directly up and off the engine. Remove and inspect the gasket & replace if needed. If you are replacing the intake, make sure you have removed any fittings which may not come with your new one! At this point I recommend covering up the open holes so you cannot drop anything into them.

LOWER INTAKE MANIFOLD REMOVAL
First we need to remove the fuel injector rails. Start by removing the 2 - 10mm nuts from the hose and bracket on the right end of the front rail. Pull the hose and bracket away from the rail (watch for spilling fuel).

Next, disconnect the grey wire harnesses from all 6 injectors. Now remove the 4 – 12mm bolts holding the fuel rail to the lower intake. CAREFULLY lift the fuel rails up off the lower intake. The injectors are just held in by o-rings so they pop right out. Set the rail assembly aside somewhere well protected (covered would not be a bad idea either), until you are ready to reinstall.

Now all that’s left is to remove the 8 – 12mm nuts and lock-washers holding the lower intake on. Be careful not to drop anything into the injector holes!

If you are not ready to reinstall the intake immediately, you may want to consider covering the port openings in the heads. You do not want to drop anything down there!

REINSTALLATION - LOWER INTAKE
Before we begin, remove any tape or other coverings you may have used to protect the open head ports. Next make sure your gaskets are installed (these gaskets can be reused since they are steel). Now set the lower intake down onto the studs (IMPORTANT! It is possible to install the lower intake backwards, so make sure it goes on the same way it came off) and install the 8 – 12mm nuts and lock-washers holding the lower intake on. Be careful not to drop anything into the injector holes! Factory torque specs these bolts is 14-15lb.ft.
Now CAREFULLY install the fuel rails onto the lower intake, making sure the injectors are all seated. Next, reinstall the 4 – 12mm bolts holding the fuel rails to the lower intake (the 2 - front rail holes also hold the brackets for the injector wiring, make sure they are in place before tightening). Factory torque specs on these bolts is 7-11 lb.ft.
Finally, reconnect the grey wire harnesses to all 6 injectors.

Now we need to reinstall the 2 - 10mm nuts with the fuel hose and bracket on the right end of the front rail. Once that is done the lower intake install is compete!

REINSTALLATION - UPPER INTAKE
First, be sure to reinstall any fittings you may have removed from your upper intake.
Now we are ready to install the upper intake, first make sure the gasket is in place (this is a steel reusable on as well). Now place the upper intake on to the lower intake and reinstall the 5 bolts and 2 nuts (all 12mm) connecting the upper and lower intake. Factory torque specs on these are 11-14 lb.ft.
Next reinstall the 3 – 12mm bolts that attack the black bracket to the rear of the intake. You can see 1 of the bolts in the photo, another in the middle, and 1 on the other end. You will have to do some of this by feel as you cannot easily see them.
The attached intake should look like this:

Now we go to the throttle bracket assembly. If you removed any of the 3 wire loom clips from the bracket, be sure to reattach them. Now reinstall the 3 – 10mm bolts holding the throttle linkage brackets to the rear of the intake (#1). Now you can reconnect the wiring harness to the back of the intake (#2). Lastly, using pliers reinstall the brake booster vacuum hose (#3).

Now go around to the driver’s side of the intake. Several things need to be reconnected here: Using pliers reinstall the vacuum line (#1), reinstall the fuel line (#2). Reinstall the Grey hose with Red stripe to the Intake (#3). Finally, reconnect injector wiring harness) (#4).

Now all you need to do is reinstall the 2 – 10mm bolts from the throttle cable brackets, the 2 – 10mm bolts from the hose brackets, & 10mm bolt from the ground strap connected to the firewall. Finished product should look like this!

Now you can proceed to my Throttle Body DIY if you need to reattach it.
Enjoy
-Ryloth