Thermostatic Coolant Simplification Kit – TCSK

Are you dedicating your VQ powered car to track use? The Z33/G35 VQ35DE engine has a complex cooling system that incorporates a factory oil heater/cooler while sending hot water to your heater core and assists in opening the engine thermostat. To accomplish this Nissan was definitely not concerned with engine aesthetics or minimizing potential leaks. As most aging 350’s or G35’s the OE preformed hoses that encompass the engine are showing their age. This is a potential track day gremlin and for most an unnecessary point of failure.

Our Thermostatic CSK system removes both the passenger and driver side coolant bypass pipes which removes the heater core from the system and removes the factory oil heater/cooler. It replaces these components with CNC Billet Aluminum components and deletes all unnecessary coolant hose which greatly reduces potential coolant leaks and streamlines your hot coolant directly to your radiator. The passenger side coolant pipe is replaced with a dedicated high temp silicone hose that works with any stock or aftermarket radiator. Our thermostatic CSK system includes a specialized Mishimoto low temp thermostat that removes the oil heater/cooler return and assists in keeping the engine at optimum temperature. Since our kit removes the oil heater/cooler its a perfect time to upgrade to a proper oil cooler such as the Mishimoto Oil Cooler System.

In addition the Thermostatic CSK system allows for an easy turbo coolant line feed. A return access as both CNC components are pre fitted with 3/8″ NPT 1/2″ hose barb to route hot water to assist in thermostat control. Looking to go the extra step, the hose barb fittings can easily be changed out to the AN fitting of your choice.

This system doesn’t fit the HR engine, Nissan completely redesigned the cooling system after the Rev Up model.

Note: For off-road racing use only.

If you haven’t already upgraded the oil cooler on your 350z or G35 click this link to see our recommended oil cooler!