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This is a much more difficult job than it should be. This is how I do it (without removing the timing belt). You'll need a good shop light.
The thermostat is located where the BOTTOM radiator hose meets the engine. Drain about the antifreeze. Remove top radiator hose, then remove the fan shroud. You may want to remove the fan, or you can work around it (expect your wrist to get several superficial scratches which is a bit annoying).
Now remove the BOTTOM radiator hose which is bolted to the engine block with one smallish bolt. You must unbolt it and disconnect it from the bottom of the radiator before you can pull it off the t-stat housing. You will be working around your PS belt (which you could also remove if necessary).
You can now access the thermostat housing. If you shine the shop light up under there you can see it. Use a ratchet with either a deep socket or extender and remove each of the three bolts hold the t-stat housing. You will be doing this by feel but can periodically stop and use the light to see what you are doing. You can now remove the t-stat housing.
Clean the old gasket off the t-stat housing and where it attaches to the engine intake with some medium grit sand paper. Position the new gasket on the t-stat housing and "glue" it there with a very thin layer of liquid gasket. If you do not do this the gasket will slip when you try to put it back on.
Install the new t-stat in the same position (spring towards engine). Make sure the t-stat is sitting right and hold it tight in position while you insert and start each of the bolts. Again, you will be working by feel, but can periodically stop and look with the light to see what you are doing. If the t-stat slips you can push it back in place with your finger through the hose hole in the t-stat housing.
Once all bolts are started hold the housing tightly in place and tighten the bolts. Check it with the light to make sure the t-stat did not slip and there is no visible gap between the housing and the engine intake.
Hang in there you're doing great!
Reattach the bottom radiator hose, remember to re-insert the bolt, the the fan (if you took it off) the shroud and the top hose. Fill with water and antifreeze. You're on your way
What else can I help you with?
Where can you find a diagram of the 1987 Nissan Pathfinder power steering?
You can find a diagram of a 1987 Nissan Pathfinder power steering system in the owner's manual. You can also find it at various auto stores.
How do you find crank sensor on a 1987 Nissan Pathfinder?
it is inside the distributor.
Where does the carb coolant hose go on a 1987 Nissan Pathfinder?
You have to tap into the heater hoses.
How do you install a thermostat on a 1987 Nissan 300ZX?
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.
Where is a 1987 Nissan Pathfiner wiring diagram?
The 1987 Nissan Pathfinder wiring diagram can be obtained from most Nissan dealerships. The wiring diagram can also be found at most auto-parts stores.
Where does the thermostat go in a 1987 Nissan 300zx?
In the thermostat housing on the front of the engine were the radiator hose attaches
How do you replace the thermostat on a 1987 Nissan pickup?
To replace the thermostat on a 1987 Nissan pickup, drain the radiator. Locate the thermostat which is under the top hose assembly, and remove the screws holding it in place. Put the new one in position and refill the radiator.
How do you change the thermostat on a 1987 Chevy van?
To change the thermostat on a 1987 Chevy van, drain the radiator and locate the thermostat under the upper host assembly. Remove the bolts holding the thermostat in and replace it.
Where can you buy a sppedometer cable for a 1987 Nissan hardbody pickup d21?
We found one out of a Pathfinder at a wrecking yard.
Where can you find a vacuum diagram for a 1987 Nissan pickup?
That info is on pages 18 and 19 of the EF(Engine fuel) & EC(Emission control)section of the 1987 Nissan Truck/Pathfinder service manual.
Where is the starter relay located on a 3.0 V6 1987 Nissan Pathfinder?
Inside the right of the engine compartment, near the battery.
What is the normal oil pressure for a 1987 Nissan Pathfinder?
New probably 40-60 psi 20 year old ???
