Well Im pulling the water pump tonight. Got everything all loosened up for when my parts get here later today.

Drained the radiator and took the monovalve off. There's my no heat problem - the pick up screen was plugged with white powder. I dont think its citric acid, its something else. Sort of chalky and not dissolvable in water like the citric. Cleaned it all out and not thats back in.

So tonight out comes the water pump, new one goes in and on with my citrus flush I go....$350 later :-)

dd

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'85 300D, 'Lance',250k, ... winter beater (100k on franken-Frybrid 3 Valve Kit)
'82 300D, 'Tex', 228k body / 170k engine ... summer car
'83 300TD Cali Wagon 210k, wife's car