Hi and thanks for using 2CarPros. Com.
Turning the heater on does help slow the process because the heater core is like a small radiator which adds additional cooling for the motor? If that is not helping, the problem needs identified and repaired. The engine produces heat when it runs. We cannot stop that.
You mentioned that you plan to drop it off for repair. If you decide to tackle the issue yourself, let me know and we can work through it together.
Wish I could help more.
Take care,
Joe
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Sunday, June 10th, 2018 AT 7:12 PM