I finally got around to flushing my cooling system and replacing the T-stat. That fixed the overcooling problem, but I still cannot get heat all the time. Sometimes it is great, but other times it is just lukewarm. Is the monovalve at fault? And is there anything I should check before replacing that?

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"There are a lot of pebbles on the beach, but there's a Little Rock in Arkansas."

Logan

1983 300D Turbodiesel
1976 300D Rustdiesel