Author Topic: Fan belt routing  (Read 7309 times)

Offline zieg85

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    • 73-87 GM squarebody extended cab and conversions up to 91 R/V series
Fan belt routing
« on: May 19, 2012, 09:47:03 PM »
Can anyone tell me the fan belt routing on a 1985 C30 5.7L with AC?  Specifically is the AC belt closest to the engine and does it go around just the ps pump?
1985 C30 Custom Deluxe Ext. cab 5.7L TH400 3.21 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
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Offline 1979C20

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Re: Fan belt routing
« Reply #1 on: May 19, 2012, 09:54:46 PM »
You should have a 3 groove crank pulley, 2 groove power steering pully. So, the first belt on is the ac, the pulley clostest to the engine block : crank-power steering-AC. Then crank - power steering, or crank-water pump-power steering. Then crank - water pump- alternator. The power steering belt routing is preference. It can go on the water pump but it doesnt have to.
1979 SCLB C20 Q-jet 350 SM465 14b F.F. 4.10 G80
1989 GMC Suburban V2500 TBI350 TH400 4in lift 35's 14b SF