Solstice L4-2.0L Turbo (2008)
Cooling System Air Bleeder Pipe / Hose: All Technical Service Bulletins
Cooling - Engine Over Heat/Poor Heater Performance
TECHNICAL
Bulletin No.: 10-06-02-001
Date: February 04, 2010
Subject: Engine Over Heat/Poor Heater Performance (Install Two Valves in Cooling System)
Models:
2007-2009 Pontiac Solstice GXP
2007-2009 Saturn SKY Redline
2007-2009 Opel GT
2007-2009 Daewoo G2X
All Equipped With RPO LNF
Condition
Some customers may comment that the engine over heat warning lamp is on and/or that there is poor heat from the HVAC system.
Cause
This condition may be due to excess air in the cooling system which results in an air pocket in the heater core.
Correction
1. Verify the engine is operating above normal operating temperature and/or that there is poor heat from the HVAC system.
2. With a cold cooling system, lower the coolant level enough that when removing the coolant return hoses from the cylinder head and radiator return
ports coolant will NOT leak on to the ground or on surrounding components. Prior to removing the hoses, place shop towels around the bottom of
the ports to absorb any lost coolant.
3. Remove the coolant return hose from the engine port. Carefully remove the clamp from the hose and set aside - the clamp will be reused in the
final step of installing the hose.
