Hi,
Here are the directions for removal and replacement of the thermostat housing. The first two pics I attached show location of the t-stat. First, here is a link showing in general how it is done:
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https://www.2carpros.com/articles/replace-thermostat
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Here are the directions specific to your vehicle. The remaining pics correlate with these directions. Note that this is for removal and replacement of the t-stat housing. Once it is off, you can access the t-stat.
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2002 Lincoln LS V8-3.9L VIN A
Procedures
Vehicle Engine, Cooling and Exhaust Cooling System Thermostat Housing Service and Repair Procedures
PROCEDURES
Thermostat Housing
Removal
1. Drain the engine cooling system.
2. Remove the intake manifold.
pic 3
3. Remove the nuts and remove the bracket.
pic 4
4. Remove the stud bolts.
pic 5
5. Disconnect the lower radiator hose from the thermostat housing.
pic 6
6. Remove the bolts.
pic 7
7. Remove the thermostat housing cover.
pic 8
8. Remove the water thermostat.
pic 9
9. Disconnect the hoses.
10. Remove the coolant outlet pipe.
pic 10
11. Remove the four bolts and the thermostat housing.
Installation
1. NOTE: Clean all the sealing surfaces, and inspect the O-ring seals thoroughly.
To install, reverse the removal procedure.
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Let me know if this helps.
Joe
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Tuesday, February 11th, 2020 AT 6:00 PM