When i turn the heater on there is a grinding noise in the engine, what is causing this

10

Asked by Apr 29, 2015 at 08:43 PM about the 2003 INFINITI M45 4 Dr STD Sedan

Question type: Maintenance & Repair

2 Answers

8,385

is it a quiet grinding or a loud

10

It is quit until I turn on heat/ac then it get loud

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