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Hi, I'm Chad. Welcome to JustAnswer. I'm reviewing your question and I will be posting your reply ASAP.
Hey how are you
1- The coffee color stuff could be oil been mixed with coolant , and if that is the case ,it means we have head gaskete problem
2- First flush the system ,change thermostat ,refill , bleed system and retest ?
3- If you let it run at idle and let it reach operating temperature ,will the fan kick in and the temp dont pass the middle mark or it will over heat ,with full of coolant and fans running and at idle ?
Please let me know
ASE Certified Technician
ok that is good .
1-Testing will be needed to see what happened, it could have blowed gasket again,but the system has to pressure tested ,flushed ,test radiator flow, fans are running when they supposed, put your hand on the top of coolant hose after thermostat opens ,can you squeeze the hose or it is hard as rock ?