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3_Angels · 07-12-2014, 08:46 AM

If there is no obvious sign of water leaks, bleed the system: excerpt from Pelican Technical Article: Boxster Coolant Replacement / Boxster Coolant Flush - 986 / 987 (these cars do not easily bleed themselves)

Now it's time to refill the coolant, and bleed the system. In the trunk, remove the oil cap, lift up the “trap door” panel (Figure 3), and then screw the oil cap back on. Flip up the metal clip that opens the bleeder valve (Figure 4). If you have an automatic transmission car, then you need to remove fuse B1, which is located in the fuse panel near the driver's side foot well (see Photo 5 of Pelican Technical Article: Roof Rack System (Roof Transport System - RTS)). This will disable the ATF cooler shut off valve temporarily. Now, fill the car up with coolant, until the coolant level is visible at the bottom edge of the coolant tank. Start the car and run it at idle, topping off the coolant to the maximum level, until no more coolant can be added. Rev the engine and let it settle down and top it off again if the level decreases. Be sure during the whole process that the car does not exceed 176° F (80° C) while bleeding the system: if the car gets too hot it will interfere with your ability to fill and bleed the system to the proper level.

Now, reinstall the reservoir cap and let the car continue to warm up at about 2500 rpm for 10 minutes or until the thermostat for the front radiators opens up. When the thermostat opens and coolant starts flowing forwards, the electrical radiator fans should turn on. Now allow the car to continue to warm up a bit more, revving the car to about 5000 rpm every 30 seconds or so. Remove the reservoir cap slowly, letting any built up pressure dissipate. There should not be any tremendous pressure built up because the bleeder valve is still open at this time. Top off the coolant in the tank to the maximum level, reinstall the cap, and repeat the process of revving the engine to about 5000 rpm for another five minutes.

Now, allow the engine to idle for a few minutes until you hear the radiator fans cycle on and off at least once. Turn off the engine, and slowly remove the reservoir cap again, relieving any pressure that might have built up there. Top off the coolant until it reaches the MAX level indicated on the coolant tank gauge, located on the side of the tank. Flip down the metal clip to close the bleeder valve and replace the “trap door” panel on top of the tank. If you have an automatic transmission car, then replace fuse B1 in the driver's side door kick panel.

07-12-2014, 08:46 AM	#3
3_Angels Registered User Join Date: Mar 2014 Location: Albuquerque Posts: 46	If there is no obvious sign of water leaks, bleed the system: excerpt from Pelican Technical Article: Boxster Coolant Replacement / Boxster Coolant Flush - 986 / 987 (these cars do not easily bleed themselves) Now it's time to refill the coolant, and bleed the system. In the trunk, remove the oil cap, lift up the “trap door” panel (Figure 3), and then screw the oil cap back on. Flip up the metal clip that opens the bleeder valve (Figure 4). If you have an automatic transmission car, then you need to remove fuse B1, which is located in the fuse panel near the driver's side foot well (see Photo 5 of Pelican Technical Article: Roof Rack System (Roof Transport System - RTS)). This will disable the ATF cooler shut off valve temporarily. Now, fill the car up with coolant, until the coolant level is visible at the bottom edge of the coolant tank. Start the car and run it at idle, topping off the coolant to the maximum level, until no more coolant can be added. Rev the engine and let it settle down and top it off again if the level decreases. Be sure during the whole process that the car does not exceed 176° F (80° C) while bleeding the system: if the car gets too hot it will interfere with your ability to fill and bleed the system to the proper level. Now, reinstall the reservoir cap and let the car continue to warm up at about 2500 rpm for 10 minutes or until the thermostat for the front radiators opens up. When the thermostat opens and coolant starts flowing forwards, the electrical radiator fans should turn on. Now allow the car to continue to warm up a bit more, revving the car to about 5000 rpm every 30 seconds or so. Remove the reservoir cap slowly, letting any built up pressure dissipate. There should not be any tremendous pressure built up because the bleeder valve is still open at this time. Top off the coolant in the tank to the maximum level, reinstall the cap, and repeat the process of revving the engine to about 5000 rpm for another five minutes. Now, allow the engine to idle for a few minutes until you hear the radiator fans cycle on and off at least once. Turn off the engine, and slowly remove the reservoir cap again, relieving any pressure that might have built up there. Top off the coolant until it reaches the MAX level indicated on the coolant tank gauge, located on the side of the tank. Flip down the metal clip to close the bleeder valve and replace the “trap door” panel on top of the tank. If you have an automatic transmission car, then replace fuse B1 in the driver's side door kick panel.