The bolts have a number on it, what is the number? There is a general torque spec in the shop manual that will say what the torque is based on that number
For your 1992 Nissan/Datsun 300ZX: Flywheel Torque 61-69 Foot pounds (Final torque)
To install a thermostat on a 1987 Nissan 300ZX, remove the two nuts and one bolt on the lower water neck. Slip off the old thermostat and use a gasket sealant to secure the new thermostat.
On my 93 the thermostat is behind the water pump. If you remove the waterpump you will see the thermostat.
The thermostat for a 1986 Nissan 300ZX is located in the engine compartment, specifically at the end of the upper radiator hose where it connects to the engine. To access it, you typically need to remove the hose and then unbolt the thermostat housing. This component regulates the engine's coolant flow to maintain optimal operating temperature. Be sure to check the vehicle's service manual for specific instructions and torque specifications.
In the thermostat housing on the front of the engine were the radiator hose attaches
water pump
Flywheel Torque 61-69 Foot pounds
When changing the thermostat on a Nissan 300zx first drain the coolant from the engine. Then find the lower coolant hose on the radiator. Trace the hose to the thermostat housing. Remove the housing to uncover the thermostat and replace the unit with a new thermostat.
200HP 227lb ft torque.
You'll have to take off the water pump because that is where the thermostat is.
25-33 ft-lb
look up 300zx manual on net it has all specs.