This guide will show you how to install a manifold insulator / spacer in your VE or VF Commodore fitted with an LFX engine (MY12+ Vehicles). This process is also very similar for late model Camaro vehicles fitted with the LFX engine.
- Socket Set
- Torx Key Set
- Spanners (Ratchet Spanners are preferable!)
- Blue RTV Gasket Maker
Remove the engine cover by pulling upwards on the front, then sliding the cover off the engine.
Disconnect the PCV pipe from the air intake resonator.
Remove the air intake pipe located between the throttle body and filter housing.
Remove the shield pictured by popping the two clips on the top of the engine. The shield can then be wiggled off the engine.
Remove the PCV (Positive Crankcase Ventilation) hose located on top of the intake manifold. This rigid hose is highlighted in Yellow. Refer to the next step for the removal process.
Follow this hose to the rear of the engine where you will find a clip-down fitting. To release this fitting, push the plastic tab across whilst pulling up on the hose.
Now rotate the hose 90 degrees in an anti-clockwise direction. You will need to bend it around the other hoses that may be in the way. This step is required to release the other end from the manifold.
Unbolt the purge solenoid from the intake manifold. There is a single bolt holding this in place as pictured.
Pull the map sensor upwards to disconnect it from the manifold. Also remove the clip holding the wire in place.
Remove the two bolts holding the fuel line shield in place. These are quite small, and there is one on each side of the engine.
Note: You will not be able to re-install these once the spacer is installed. The shield will actually sit comfortably in place without requiring the bolts.
Next, unbolt the final bolt securing the manifold to the engine. You will need to unscrew this bolt entirely, however you will not be able to remove it from the manifold due to a lack of clearance. It needs to be guided out with the manifold upon its removal in the next step.
The intake manifold can now be removed from the vehicle. Grasp the throttle body and gently lift upwards and away from the engine, guiding the remaining bolt out at the same time.
This is what the engine looks like without an intake manifold! Use this opportunity to inspect the intake runners. If they’re covered in oil and grime, perhaps it is time to install a Catch Can!
With the intake manifold removed from the vehicle, flip it over to reveal four triangular shaped screws that hold the aluminium section in place. Unscrew these using a HEX key and remove the aluminium piece.
Orientate the spacer onto the manifold. To aid this process you can insert the long OEM bolts into the holes to help align the spacer onto the manifold. Once secure, place a thin bead of gasket sealer around each runner as per the blue illustration on the image.
Next, place the aluminium piece onto the spacer and screw into place using the supplied screws (Which are longer than the original ones). Wipe up any excess sealant around the outside and inside the intake runners as shown in the image.
Once the sealant has dried, install the manifold back onto the vehicle.
Please note that the rear bolt on the manifold MUST be pre-inserted into the manifold as you guide it into position, reversing the initial removal process. Due to the length of this bolt, it can not be inserted after the manifold is in place. There is simply not enough room above the intake manifold.