rogeriwt;
I do believe you may want to wish to re-think your comment. bbforks suggestion is almost identical to the manufacture's recommendation. It is just missing a few other task which are included in Nissan's procedures to correct this issue.
Removal of the thermostat and running the engine without it, is not a wise procedure to take on a bottom by-pass thermostat. Removal of the thermostat and putting it in a calorimeter to check it's function is the OEM's recommended step to take.
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