Introduction

This guide will show you how to install a catch can 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.

Tools Required

  • Hose Cutters
  • Socket Set

Parts Required

  • Catch Can
  • Oil/Fuel Hose (Internal Diameter 10mm)
  • Mounting Hardware
  • Cable Ties

Step 1

Remove the engine cover by pulling upwards on the front, then sliding the cover off the engine.

VE Commodore Engine Cover

Step 2

Remove the shield pictured by popping the two clips on the top of the engine. The shield can then be wiggled off the engine.

VE Commodore LFX Engine

Step 3

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.

VE Commodore Manifold Insulator / Spacer

Step 4

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.

VE Commodore Manifold Insulator / Spacer

Step 5

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.

VE Commodore Manifold Insulator / Spacer

Step 6

Once rotated 90 degrees, pull the PCV hose upwards and remove from the vehicle.

VE Commodore Manifold Insulator / Spacer

Step 7

With the PCV pipe removed, you will need to cut it in half as circled in the image.

Both halves can then be reconnected to the engine.

LFX Catch Can

Step 8

You will now need to mount the catch can in a suitable location. This will largely depend on the size and design of the catch can.

We chose to affix the catch can to a bracket, which was then bolted to the upper radiator mount as seen in the image.

LFX Catch Can

Step 9

With two appropriately sized hoses, they will need to be routed as follows:

Connect the ‘clean side’ (Green) line to the intake manifold (1) and the catch can outlet (2)

Connect the ‘dirty side’ (Red) line to the crankcase ventilation (3) and the catch can inlet (4)

LFX Catch Can

Step 10

Neaten the installation with a few cable ties, re-install remaining parts, then the job is complete.

The dirty air will flow from the crankcase ventilation through the top of the catch can (Red). Within the catch can the oil particles will rapidly condense and collect in the bottom as a liquid. The clean air will then exit through the outlet and return to the engine via the intake manifold (Green).

This clean air will result in a huge reduction of oil deposits within your intake system. This means a cleaner, better performing engine. Don’t forget to empty the catch can alongside scheduled oil changes, or more frequently if required.

11 comments on “V6 LFX Catch Can Installation

  1. John says:

    Thanks for the speedy reply.
    I figure the low pressure pump in the tank is mature technology and robust enough to handle a little fuel contamination.
    I really wanted to make sure that nothing got through to that high pressure pump (2000psi) mounted on the rear of the LH camshaft. They fail without warning and are expensive to replace, as the transmission needs to be removed to access them.
    I still think there is merit in the addition of a replaceable inline filter, but it probably needs to be located just before the pressure sensor. Apparently the low pressure pump is switched on and off to modulate the fuel pressure to the inlet of the HP pump depending on engine demand/conditions…

    • Staff @ AutoInstruct says:

      I’ve never personally heard of a HPFP failing on the VE Commodore, so I wouldn’t think it’s that common, however best to speak with a workshop on this one, especially when it comes to the appropriate fittings to adapt the hard fuel lines.

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