It can be hard to find trustworthy information on the LF3 & LF4 engine. In this section we will collect & link together a useful repository of information such as DIY install guides/videos to help with your LF3/4 build & its maintenance. Special thanks to Josh Thornell of Fatal Garage & Danial Stalcup of the JetFuelOnly channel for the amazing content.
This video shows how to change the spark plugs on an ATS-V.
The process is very similar on the CTS Vsport.
This video is to give you a good idea of the process to bleed and add coolant to the VSport LF3 and ATS-V LF4. You do not need to purchase the bleeding kit to get this job done. With schmidty tune on the car, the pump is commanded to run in accessory mode, so no need to jump, just hold the start button 5 seconds with your foot off the brake and the car will go to accessory mode.
You can do the job with:
Simply attach the hose to the filler neck with funnel, fill with dexcool, put car into accessory mode and open the valve with your dowel and allow it to gravity feed the system until no more bubbles come out and pump stays running constantly
This video shows how to install downpipes on an ATS-V. The CTS Vsport process is nearly identical besides the additional extension piece provided by Renick Performance for the ATS-V.
This video shows how to access the PTM menu on the ATS-V, this is also how you use the factory launch control by entering the PTM menu, pushing the brake to the floor, & then the gas to the floor at the same time.
This video is a great guide on how to install a fuel lobe cam on an ATS-V or Vsport in order to increase the fuel supply from the high pressure fuel system.
This video shows how to remove the stock HPFP to install the Autotech internals, as well as the Flex Fuel sensor for an ATS-V or Vsport engine. These mods are crucial to run E85 on these platforms.
This video shows how to install a new drive shaft on the ATS-V
This video shows how to change the brake rotors, pads and fluid on your
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