Dash temp gauge reads normal and doesn't take unsually long to get there. Heat is fine at "city" speed, blows cool at hwy speed. I've never seen the radiator fan operate, even when idling for long periods. That can't be normal.

I don't know, does a 1986 SL have similar computerization to a 1995 E?

__________________
1991 560SEL (254K miles)
1980 Lincoln Mark VI - Givenchy
1979 Lincoln Mark V Collector's Series
1979 Lincoln Town Car Collector's Series
1979 Ford "Effie" Pickup (in gradual transformation to a show/street truck)
1969 Lincoln Mark III (waiting for "Overhaulin" to call)
1989 Lincoln Towncar
2001 Lexus GS300 (spousal unit's daily driver)