How to remove and install the thermostat on Cadillac ElDorado and Fleetwood?

For 4.5L and 4.9L engines, drain coolant, and remove the upper air filter assembly. Next, unscrew the two bolts of the upper thermostat housing, then remove the thermostat. Install a new thermostat and O-ring, reattach the housing, and tighten the bolts. Refill the system, start the engine, and make sure there are no leaks.

Genuine Cadillac Eldorado Thermostat

Engine Coolant Thermostat

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9 Thermostats found

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Cadillac Eldorado Housing, Thermostat
Part Number: 1647540
$11.14 MSRP: $21.01
You Save: $9.87 (47%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: HOUSING, Engine Coolant Thermostat; Thermostat Housing, Water Outlet
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1993-2002 Cadillac Eldorado | COMMERCIAL CHASSIS, ELDORADO | 8 Cyl 4.6L
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Cadillac Eldorado Thermostat,Engine Coolant
Part Number: 12559807
$43.23 MSRP: $87.72
You Save: $44.49 (51%)
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Product Specifications
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
- Replaces: 3531407, 12555811, 12554784
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1993-2002 Cadillac Eldorado | COMMERCIAL CHASSIS, ELDORADO | 8 Cyl 4.6L
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Cadillac Eldorado Thermostat,Engine Coolant
Part Number: 3539588
$9.25 MSRP: $17.46
You Save: $8.21 (48%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1986-1993 Cadillac Eldorado | COMMERCIAL CHASSIS, ELDORADO | 8 Cyl 4.1L, 8 Cyl 4.5L, 8 Cyl 4.9L
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Cadillac Eldorado Thermostat,Engine Coolant
Part Number: 12514334
$12.91 MSRP: $23.16
You Save: $10.25 (45%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1982 Cadillac Eldorado | ELDORADO | 6 Cyl 4.1L
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Cadillac Eldorado Thermostat,Engine Coolant
Part Number: 10207373
$10.85 MSRP: $19.72
You Save: $8.87 (45%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1982-1985 Cadillac Eldorado | BIARRITZ, COMMERCIAL CHASSIS, ELDORADO | 8 Cyl 5.7L Diesel
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Cadillac Eldorado Thermostat Assembly, Engine Coolant
Part Number: 1623547
Product Specifications
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1982-1985 Cadillac Eldorado | BIARRITZ, COMMERCIAL CHASSIS, ELDORADO | 6 Cyl 4.1L, 8 Cyl 4.1L, 8 Cyl 5.7L Diesel
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Cadillac Eldorado Housing
Part Number: 1646974
Product Specifications
- Other Name: HOUSING, Engine Coolant Thermostat; Thermostat Housing, Thermostat Outlet Housing
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1988-1993 Cadillac Eldorado | COMMERCIAL CHASSIS, ELDORADO | 8 Cyl 4.5L, 8 Cyl 4.9L
View related parts
Cadillac Eldorado Housing
Part Number: 1625774
Product Specifications
- Other Name: HOUSING, Engine Coolant Thermostat; Thermostat Housing
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1986-1990 Cadillac Eldorado | COMMERCIAL CHASSIS, ELDORADO | 8 Cyl 4.1L, 8 Cyl 4.5L
View related parts
Cadillac Eldorado Housing
Part Number: 3520936
Product Specifications
- Other Name: HOUSING, Engine Coolant Thermostat; Thermostat Housing, Thermostat Outlet Housing
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1988-1993 Cadillac Eldorado | COMMERCIAL CHASSIS, ELDORADO | 8 Cyl 4.5L, 8 Cyl 4.9L

Cadillac Eldorado Thermostat Parts Questions & Experts Answers

Thermostat,Engine Coolant
3539588
Q: How to remove and install the thermostat on Cadillac ElDorado and Fleetwood?
A: For 4.5L and 4.9L engines, drain coolant, and remove the upper air filter assembly. Next, unscrew the two bolts of the upper thermostat housing, then remove the thermostat. Install a new thermostat and O-ring, reattach the housing, and tighten the bolts. Refill the system, start the engine, and make sure there are no leaks.