Did you open the vent valve at the reservoir and run engine for a while to get trapped air out? I don’t see a need to drain new coolant only to refill.
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1997 Boxster arctic silver/ red, XNE riveted mahogany/ leather steering wheel & 917-style wood shift knob, Ben’s short shifter, PSE, 996 TB, UDP, stereo/ center console delete, hardtop and speedster humps, daily driver rain or shine or snow!
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