Is there a simple way to replace that maybe I'm missing? Looks like I have to pull the water pump.

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1983 300SD 240,000?
1992 300 E 160,000
1993 Honda Del Sol 198,000

I mean the small hose between the block and thermostat housing . Mine split in half.

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1983 300SD 240,000?
1992 300 E 160,000
1993 Honda Del Sol 198,000

Fully remove clamps, cut the old hose off and slip the small end of the new hose on then slide it over the larger nipple. It will fit between the gap just takes a little effort.