I was curious too about indicated temperature. My '85SD runs at about 85-90 in MOST circumstances. The exception was when I ran a stretch of freeway at 85-90 mph and it crept up to about 100.

Shall I assume that this is normal, and that the cooling system isn't sized to keep 85-90 at near full power output? In any case, there isn't much opportunity to run high speeds commuting to/from Detroit, where 65 mph is cause for jubilation!


BCingU, Jim

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'96 E300D 58k mi (wife's daily ride)
'95 Audi 90 118k mi
'92 GMC Suburban 138k mi
'85 300SD 230k mi (my daily ride)