Quote:
Originally Posted by rosenfe
is o ring different on 116 vs 123,i havent taken old one out,but in box with new thermostst came a thin rubber o ring,on my 85300d the o ring is fatter with a little lip on top with hole in it,are they different -i want to have correct o ring before i take it apart
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The turbo 617's have the thermostat bypass and need the gasket with the small hole. The shape of the thermostat housing cover will give a good clue as to which gasket is required.