Hello, on your motor, it is necessary to remove the exhaust cross over pipe to access the thermostat housing. Instruction below. Thanks
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
Tighten Tighten the exhaust crossover pipe bolts to 25 N·m (18 lb ft).
Tighten Tighten the exhaust crossover pipe heat shield bolts to 10 N·m (89 lb in).
Tighten Tighten the thermostat housing bolts to 25 N·m (18 lb ft).
Tighten Tighten the surge tank line fitting to 21 N·m (15 lb ft).