2004 - Engine Cooling System - Coupe: Maintenance Infiniti G35 III

Flushing Cooling System

1. Fill radiator with water until water spills from the air relief hole, then close air relief plug. Fill radiator and reservoir tank with water and reinstall radiator cap.
2. Run engine and warm it up to normal operating temperature.
3. Rev engine two or three times under no-load.
4. Stop engine and wait until it cools down.
5. Drain water from the system. Refer to «DRAINING ENGINE COOLANT»(ref-179447-S18905748542005070800000) .
6. Repeat steps 1 through 5 until clear water begins to drain from radiator.

Scheme 99

Scheme 100

Scheme 101

Scheme 102

Scheme 103

1. Remove engine cover with power tool. Refer to «INTAKE MANIFOLD COLLECTOR»(ref-159319-S30522086712005010600000).
2. Remove undercover with power tool.
3. Drain engine coolant from radiator. Refer to «CHANGING ENGINE COOLANT»(ref-179447-S03967100672005070800000). CAUTION: Perform when the engine is cold.
4. Disconnect A/T fluid cooler hoses. (A/T models) Install blind plug to avoid leakage of A/T fluid.
5. Remove air duct (inlet) and air cleaner case. Refer to «AIR CLEANER AND AIR DUCT»(ref-159319-S16893288942005010600000).
6. Remove bracket mounting bolt for anchoring A/C piping from vehicle left side, so that A/C piping can be moved.
7. Remove reservoir tank and bracket.
8. Remove radiator hoses (upper and lower) and reservoir tank hose. CAUTION: Be careful not to allow engine coolant to contact drive belts.
9. Remove radiator cooling fan assembly. Refer to «COOLING FAN»(ref-179447-S37964667422005070800000).
10. Rotate two radiator upper mount brackets 90 degrees in the direction (Scheme 100)and remove them.
11. Remove two A/C condenser mounting bolts located in upper part of radiator.
12. Remove radiator as follows: CAUTION: Do not damage or scratch A/C condenser and radiator core when removing. With lifting and pulling radiator in a rear direction, disassemble lower mount from radiator core support center. CAUTION: Because A/C condenser is onto the front-lower portion of radiator, moving to rear direction should be at minimum. Lift A/C condenser up and remove radiator after disengaging the fitting as front-bottom surface. CAUTION: Lifting A/C condenser should be minimum to prevent a load to A/C piping. After removing radiator, put A/C condenser on radiator core support center to prevent a load to A/C piping, and temporarily fix it with a rope or similar means.