Where does the PCV valve hook up to on a 6 l engine?

The PCV valve's location on a 6L engine (assuming you mean a 6.0L engine, as there are many 6L engines from different manufacturers) varies slightly depending on the specific make and model of the vehicle. However, it generally connects to two places:

* The valve cover: One end of the PCV valve is typically connected to a port in the valve cover. This allows crankcase gases to enter the PCV system.

* The intake manifold (or a related intake tube): The other end of the PCV valve is connected to a vacuum source, usually a port on the intake manifold or a tube leading to it. This vacuum draws the crankcase gases into the intake, where they're burned in the combustion chamber.

To find the exact location on *your* 6.0L engine:

1. Consult your vehicle's repair manual: This is the most reliable source. The manual will have diagrams showing the PCV valve and its connections.

2. Use a repair database: Sites like AllDataDIY or Chilton offer diagrams and repair information for many vehicles.

3. Search online for your specific vehicle's year, make, and model: A picture search might reveal images of the engine bay showing the PCV valve location.

Without knowing the specific vehicle, it's impossible to give a more precise answer. Remember to be cautious when working on your engine and always disconnect the negative battery terminal before beginning any repairs.