^^Lots of assumptions. Techs are not gods. Was this a dealer tech or independent shop? I'd likely be more trusting of the latter.
Btw, probably a good idea to replace a radiator cap anytime a drain/fill is done. Cheap insurance.
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G37S Sedan 6MT, Eibach swaybars, Invidia Exhaust, Weaker Clutch Pedal Spring
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