Car getting Warm!

Cool Z4

Active member
 So. Cal, USA
One day, my wife calls me and says there is liquid on the garage floor after I pulled out for work. In the afternoon, I had my radiator light come on. Weather conditions at the time was in the 100+deg F range, so of course, I had the A/C blasting and :oops: top up :oops: . I saw the temp rising, so I turned off my A/C off and the temp fell back to normal range. Turn A/C back on, temp slowly started to rise again.
Next day, I took it to the indy mechanic. They found the expansion tank to be cracked and the top radiator hose needed to be changed. Fixed all that. Now, I still have the same problem with the temp slowly climbing with the A/C on while driving city speeds, not at highway speeds, and with top down as well :wink:
So, got any ideas?
 
Could be the system has some air trapped inside. N52 engines have a special bleed procedure that may have been overlooked. For M54s crack open the bleed valve with the engine running at normal temperature. If bubbles come out, there is still air in the system. If just liquid, you may have a thermostat or pump issue.
 
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