Engine & Performance
Guys,
I have 2 trucks. a 1986 chev 1/2 ton and a 1993 gm 2500 with the 6.5l diesel. When cold the 86 fan wont move when the truck is not running and the 93 6.5 the fan is easy to spin. Which is correct. the 86 seems to have loud fan noise when running at 2000rpm and the 6.5l has heating issues...