The front passenger side will be held down with a double ended bolt.the PVC rubber hose has a grounding strap going to it which is held on by a nut. Be carefull with the bolts, you don't want them falling into the intake ports of your heads. There are 4 bolts holding it down at each end of the "X" shaped pipe. The next step is to remove the old coolant lines that run between the heads. The floor of the manifolds differ as you can see in the picture. Now that the old intake manifold is off, you can compare it to the new intake manifold. Be carefull with it and set it aside somewhere in the engine bay for now. Here is the fuel rail totally disconnected from the intake manifold. You can also try pulling up the front of the rail to pop out the front 2 injectors on one side first, then pull on the back end of the rail for the back 2 injectors.then do the same for other side. The 4 injectors on that side will "pop" out of the hole. Now, with one hand hold the intake manifold firmly, and with the other pull up on one side of the fuel rail (pull by grabbing the rail, not the injectors). Remove the 4 remaining bolts holding the fuel rail to the intake manifold. Now you can pull the intake manifold out a little more into the open since its just connected by the fuel line now. Leave the big vacuum hose connected for now, the other end was disconnected in the previous step. Now, reach behind the intake manifold and there will be a sensor and a small vacuum hose to disconnect. Now, holding the back 4 (or 2 on the C5) bolts up out of their holes as far as you can try to slide the intake manifold out towards you as far as you can without pulling too hard, as there is still a hose attached to the back! On the corvette you only need to leave the back 2 in. You should be able to totally pull out the first 6 bolts, but just leave the back 4 sitting in the hole after you've unbolted them as they'll probably hit the cowl. These are the 10 bolts that DON'T have threads on both ends. Unbolt all 10 8mm bolts that hold down the intake manifold to the engine. To disconnect the plastic connector, you need to press in the grey ring and then pull the whole connection off the brass fitting on the intake manifold. There is a hose on the left, and a plastic connector for fuel on the right. Now remove the remaining hoses/connectors going to the front of the intake manifold. The picture on the left shows which hose this is. Remove the big vacuum hose from the brake booster. There was also a wire harness on the drivers side fuel rail going to a valve of some sort, I disconnected this as well. To do this, push upwards on the shiny metal clip on the bottom of the harness, then pull of harness off the injector. Do this now.ĭisconnect each wire harness going to the 8 injectors. You will need to put a block off plate on your headers if you are removing the EGR assembly. You need to unbolt the egr tube from the passenger side header (2 10mm bolts), and then unbolt the 2 15mm bolts holding the EGR assembly to the passenger side head. Then, if your new intake manifold doesn't have EGR provisions, remove the wiring harness going to the egr assembly. Unbolt the EGR pipe from the top front of the intake manifold. Next, disconnect the sensor plugs off the throttle body, pull off the coolant lines going to the bottom of the throttle body, disconnect the throttle cable and pull off the cruise control cable if you have it, corvettes will have no throttle cables as they are fly by wire. If you have a C5, unscrew the airbridge where it connects to the throttlebody, then unscrew the clamp where your maf goes into your air filter assembly.remove the whole tube/maf piece and set it aside. If you have an F-body, just loosen the screw on the intake tubing going to the throttle body, unclip the lid, and pull it all off in one piece. (Note, f-body specific instructions will be orange, andĬ5 specific instructions will be yellow.)įirst step is to remove the air intake/maf assembly. 2x 2001+ rear coolant plugs - #12562788 (Note, you can use a 2nd coolant pipe in place of these plugs if necessary) Intake Manifold Swap E-mail jmX with corrections Click here for a printable version Tools Needed:
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