Thermostat is under the intake and you'll have to remove it to replace the thermostat...gotta love engineers.

Lot's of VX owners have done the repair themselves. It's messy but not overly complicated.

While you there check the coolant line o-rings. They are an off size and hard to find if you find one that is hard/cracked and needs replacement.

Clean your EGR tube while you have the intake off as well.

Join the VehiCROSS Facebook page for help as well. It's more active than the forum and you can typically get help quicker.