Achieva L4-144 2.4L DOHC VIN T SFI (1996)
3.
If any signs of coolant leakage are noted, replace the thermostat gasket using the procedures in the Engine Cooling Section of the Service Manual.
4.
If the thermostat seal has been replaced with part number 24576633 and there continues to be leakage between the radiator outlet pipe (thermostat
housing on 2.2L engines) and the coolant pump cover (coolant inlet pipe on 2.2L engines), replace the thermostat housing on 2.2L engines or the
radiator outlet pipe on 2.4L engines.
Important:
Do not attempt to install any seal other than 24576633 into this joint! If an attempt is made to install a thicker seal, the flange on the radiator outlet
pipe will be distorted when it is tightened creating an additional leak. If any attempt has been made to repair the leak with a thicker seal, the
thermostat housing on 2.2L (RPO LN2) engines or the radiator outlet pipe on 2.4L (RPO LD9) engines should be replaced to prevent leaks caused by
distortion.
Important:
DO NOT REPLACE 82°C (180°F) 1996 THERMOSTAT WITH ANY OTHER THERMOSTAT. If poor heater performance is noted, follow
diagnostic procedures in Section 1A of the appropriate Service Manual.
In some instances of poor heater performance, 1995 91°C (195°F) thermostats have been installed in 1996 2.2L LN2 and 2.4L LD9 engines. The
1996 thermostat used for the inlet thermostat system is unique and cannot be replaced with a thermostat from an outlet side thermostat application.
If a 1995 91°C (195°F) thermostat is used to replace a 1996 82°C (180°F) thermostat, the following conditions WILL occur:
^
91°C (195°F) (1995) vs. 82°C (180°F) (1996) will cause the 1996 2.2L LN2 and 2.4L LD9 engines to run hotter at low RPM.
^
A lighter spring in the 91°C (195°F) (1995) thermostat will allow the thermostat to be pulled open by coolant flow at higher RPM, causing the
engine to run too cold and will cause poor heater performance at highway speeds.
5.
On vehicles equipped with the 2.4 Liter (VIN Engine Code T RPO LD9) engine, inspect the sealing of the joint between the coolant outlet and the
cooling system air bleed pipe.
If any leakage is noted, replace the coolant outlet, GM P/N 24575259, air bleed pipe, GM P/N 24574205, and "0" ring seal, GM P/N 24573057.
Use silicone based lubricant, GM P/N 12345579, when installing the new air bleed pipe and seal into the coolant outlet.
Parts Information
Whenever ordering parts, refer to the part numbers as shown.
Warranty Information
