Since I am MB diesel-less I am driving around my Cummins in 8F weather which having lived in 60F winter weather for 30 years is a shock. I can't reach operating temperatures of 190F. I reach 150F if I am lucky.

Has anyone tried removing the fan and or taping up the radiator airflow areas for the winter with positive or negative results?

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1974 240D 3.0L 4(M) - 250K -OM617.910 + 300D FW + Rajay turbo power!
1977 6.9 3(A) - 84k