Engine temperatures
Engine temperatures
On my 97 om606 na, I ditched the viscous fan and replace the belt driven aux fan with a second electric fan, like the baby Yezus intended. The first fan runs as normal triggered by the AC, the second fan is belt driven until its own switch and relay which turns it on at max speed at 90c. That also feeds full power to the first fan as well so both are going full blast. Last summer we sat in traffic in 115f with the AC blowing 45f out the vents. The coolant temp never exceeded 90c.