Clutch fan

[heavy iron]

Well found out that 1987 clutch fan for a suburban this 350 is different then one for a 1990 . Bolt pattern is out father and blade angle is different .so what I did is port the hole so it would fit . The fan is so loud and the truck went from running 210 to 250 .put the old one back on went right back to 210 . running a 195 thermostat and put a new OEM fan shroud with the factory 2core radiator. Reading this on the factory temperature gauge. Anyone run colder or is this normal temperature

 

[sweetk30]

a 87 will prob be still v/belt style .

and 90 should be serp belt style .

this = fan that spins different direction = your problem .

 

[heavy iron]

a 87 will prob be still v/belt style .

and 90 should be serp belt style .

this = fan that spins different direction = your problem .

 

[heavy iron]

Ah I see now .but what temp does a 1990 TBI 350 run at in a suburban. If it hot out or cold still runs at 210 °

 

[sweetk30]

some one prob put in a 195* t-stat . . . .

how many core rad ?

how does the core tubes look inside ? full of junky build up ?

fan shroud ?

whats the coolent mix test out at freeze/boil point ? whats the age of it ?