How to check and replace a thermostat in a cooling system on Saturn LS and LS1?

Before replacing the thermostat, inspect the coolant level, drive belt tension, and temperature gauge operation. In 2004 models, remove the exhaust manifold heat shield, drain the coolant, remove the thermostat cover, and replace the thermostat. For V6 models, remove the intake manifold, and disconnect the radiator hose.

Genuine Saturn LS1 Thermostat

Engine Coolant Thermostat

Select Vehicle by Model
Select Vehicle by VIN

Select Vehicle by Model

Make

Model

Year

Select Vehicle by VIN

For the most accurate results, select vehicle by your VIN (Vehicle Identification Number).

2 Thermostats found

View related parts
Saturn LS1 Thermostat Assembly, Engine Coolant
Part Number: 12622410
$77.07 MSRP: $156.38
You Save: $79.31 (51%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
- Replaces: 21018811, 90537453, 55350941, 12615097
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2000 Saturn LS1 | LS, LS1, LS2, LW1, LW2 | 4 Cyl 2.2L
View related parts
Saturn LS1 Housing Asm,Engine Coolant Thermostat
Part Number: 90537819
Product Specifications
- Other Name: HOUSING, Engine Coolant Thermostat; Inlet Assembly
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2000 Saturn LS1 | LS, LS1, LS2, LW1, LW2 | 4 Cyl 2.2L

Saturn LS1 Thermostat Parts Questions & Experts Answers

Thermostat Assembly, Engine Coolant
12622410
Q: How to check and replace a thermostat in a cooling system on Saturn LS and LS1?
A: Before replacing the thermostat, inspect the coolant level, drive belt tension, and temperature gauge operation. In 2004 models, remove the exhaust manifold heat shield, drain the coolant, remove the thermostat cover, and replace the thermostat. For V6 models, remove the intake manifold, and disconnect the radiator hose.