Changed By: Boxsterra Change Date: April 21, 2013 10:37AM Diagnostics
A slightly low coolant level generally won't cause overheating unless air gets sucked into the system, which only happens if the reservoir is quite low. If that's the case, the problem will generally persist until you bleed out the air. Driving with the bleeder valve open for a while should do the trick.
One thing to check (since it's easy) is the ballast resistors. Instructions here: http://pedrosboard.com/read.php?7,4382,4424
You can also check under the water pump for signs of leakage, which is normal as it starts to fail. The water pump is located on the bottom of the car behind the passenger seat (for left-drive cars). If it's leaking you should see white crusty stuff on the bottom.
Those really are the top three.
For completeness you should also check the last two digits of your coolant cap (443.121.321.XX) to see if it's one of the obsolete designs. I think the latest version is 04.
Original Message
Author: Boxsterra Date: April 21, 2013 10:36AM Diagnostics
A slightly low coolant level generally won't cause overheating unless air gets sucked into the system, which only happens if the reservoir is quite low. If that's the case, the problem will generally persist until you bleed out the air. Driving with the bleeder valve open for a while should do the trick.
One thing to check (since it's easy) is the ballast resistors. Instructions here: http://pedrosboard.com/read.php?7,4382,4424
You can also check under the water pump for signs of leakage, which is normal as it starts to fail. The water pump is located on the bottom behind the passenger seat (for left-drive cars). If it's leaking you should see white crusty stuff on the bottom.
Those really are the top three.
For completeness you should also check the last two digits of your coolant cap (443.121.321.XX) to see if it's one of the obsolete designs. I think the latest version is 04.