PS267

susJEcT:
GROUP
MODEL
Engine
NUMBER
2010-201 JMY
Forte TD
DATE
PS267
March 2013
THERMOSTAT RE-INSTALLATION PROCEDURE- REPEAT
REPAIR (OTC P0128)
When diagnosing a Forte returning with a repeat OTC P0128 after replacement of the
thermostat, remove the thermostat housing to verify if the thermostat was installed incorrectly
during the previous repair. Incorrect installation may be difficult to determine due to the
sideways orientation of the thermostat housing, however, pay close attention when the
housing is removed for coolant flowing out and displacing the thermostat as soon as the
housing is separated. In some cases if the housing is closely inspected , witness marks on the
housing or gasket outside of the thermostat outer edge may be visible ; if so, the thermostat
was installed incorrectly (Fig. 1).
lmprope r Installation
Proper Installation
*NOTICE
Removing the upper coolant hose from the housing will relieve tension and make
the thermostat installation easier.
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To prevent any further repeat repairs, follow the procedure outlined on KGIS and remove all
necessary components to gain proper access, including the air box assembly. Correctly
position the thermostat in the housing by aligning the tab on the thermostat housing (Fig. 3)
with the tab on the thermostat body (Fig. 4) . Try rotating the thermostat to validate if it is
properly indexed and seated. No movement should be possible, if properly installed . Make
sure the thermostat does not move during installation of the housing as this could cause
repeat repairs .
I Fig .4 I
Alignment Tab on
Thermostat Housing
Alignment Tab on
Thermostat
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