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Old 06-24-2010, 04:17 PM   #130 (permalink)
IsaacCarlson
eco....something or other
 
Join Date: Jul 2009
Location: Colfax, WI
Posts: 724

wood hauler - '91 Ford F-250
Team Pontiac
90 day: 26.69 mpg (US)

Rav - '06 Toyota Rav4 Base
90 day: 26.52 mpg (US)
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I pulled the serpentine belt today to check bearings and look the belt over and found out the smog pump bearings were just about seized and the power steering pump was really stiff and I had removed most of the A/C components earlier so I wanted to bypass the A/C pulley. I picked up a ribbed tensioner pulley and a MUCH shorter belt and rerouted it. I also checked the timing because I was having to crank it twice just to start it. The timing was almost 5° ATDC so I set it at 14° BTDC. Starts right up. It is not hard to steer and runs much smoother.

The alternator bolt was in the way so I ground the head a little and also cut the bushing down to flush. The belt now clears it by 1/16th of an inch. Just enough. The belt goes around the crank and up over the fan/water pump and to the tensioner and then over the alt and back down. SIMPLE. The belt is about 63" compared to 98" original. I still need to loop the P/S lines so I am not fighting the pump. I have been getting about 25 mpg as I have been hauling stuff....like my tractor and plow. I actually got close to 20 mpg pulling that thing.

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1991 F-250:
4.9L, Mazda 5 speed, 4.10 10.25" rear
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