On the OE fan. You want to be sure you have the CORRECT fan. Isuzu 2.8 fans are getting hard to come by. There is a GM fan that fits, but it is wrong because GM made these engines with fans that turned clockwise, and fans that turned counterclockwise. The wrong fan pushes air forward through the radiator, this cools them when they are idling, but when you start driving, the fan is fighting the incoming air and the radiator doesn't get sufficient air. Know this from experience (Chevy Blazers - same basic engine). Dennis
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The fan would have to be one to fit 1989-1991 2.8 Trooper, 1991-1992 3.1 Rodeo, 1990(?) - 1994 3.1 pickup. They are hard to come by. Dennis
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