How To Rebuild Your Ford V-8 351C-351M-400-429-460.pdf - Index of

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Tightening belts the easy way-with a breaker bar at the A/C compressor and an adjusting
nut at the power-steering pump. Readjust the belts for the proper 1/2-Inch deflection
after you've run your engine.
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- have to wait until the drive belts are in- belt tension. Posh firmly on the belt
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stalled before you can torque the (about 10-lbs. pressure) and measure how
Time for the belts. Make sure they,re new mounting bolts. So for now, tighten them much it deflects. A properly adjusted belt
or in great shape. Loosely install them from as much as you can, then complete the should deflect approximately 112 inch in
back to front. job after installing and adjusting the belts. the middle of an unsupported length of
Accessory-Drive Belts-Your engine will 14-18 inches. For new belts, the deflecbe
equipped with one t~ four belts, again tion can be slightly less, but after it's run
depending on the accessories your engine for ten minutes or more, recheck it. If
water-pump shaft and line up the holes in is equipped with. If they are more than You want to be more accurate when usin'g
the pulley with those in the water-pump two-years old, replace them. Inspect them the deflection method, lay a straight edge
flange after loosely installing the alterna- regardless. If you have more than one on the backside of the belt to gage from.
tor and air-pump belts if you have a 4291 drive belt, install them in the proper, Belt Adjustment-Depending on the year
460, This is necessary because there's not order back to front. YOU should have' of your car and how it's equipped, there
enough room between the water-pump already started with the alternator or air- are three possible ways to adjust a drive
and crankshaft pulleys to slip the belts on Pump belt if you have a 4291460. belt. The most common, and the one you
their pulleys. If you have a futed fan, It's very important that the belts be will have regardless of the year and how
loosely assemble the fan, spacer, the four adjusted to their proper tension. If one is your car is equipped, is the type requiring
mounting bolts and lock washers and too loose, it will slip on the pulley. If the that the accessory be rotated on a pivot.
locate this assembly on the water-pump belt happens to be driving the alternator, All alternators and rotary A/C compressors
shaft and start the bolts. Tighten the you'll be plagued by a battery that seems use this method as well as some powerbolts
in a criss-cross pattern and torque to run down for no reason. Conversely, if steering pumps. To adjust a belt, rotate
them 10-1 5 ft.lbs. You'll have to hold the a belt is too tight, it will overload all the the accessory with a pry bar or large
fan to keep it from turning while tight- bearings in the pulleys and shafts it drives screwdriver to hold the belt in tension
ening the bolts. and is driven by. This is particularly im- while you tighten the adjusting bolt to
If your fan is the flex-blade type, in- portant in the case of a water pump. hold this tension. When doing this, make
spect the blades for cracks. Because of They don't take kindly to being over- sure the pivot bolt is loose. And don't pry
the constant flexing, the roots of the loaded. It shortens a water pump's bearing against something which is easily damaged
blades can eventually fatigue to the point life drastically. such as a power-steering-pump reservoir.
of cracking and breaking off. As a result, As for how tight a drive belt should You won't have this problem with the
this type of fan has been known to throw be, Ford specifies 140 lbs, tension in a rotary-type A/C compressor. There's a
a blade when the engine is running, so new belt and 100 lbs. in a used one-a 112-inch square hole provided for using
remember, never stand in line with a fan used belt being defined as one that has Your 112-inch-drive breaker bar to tension
when the engine is running, particularly been run for more than 10 minutes. its belt. It's a lot easier than trying to find
when the engine is operating faster than Knowing the correct tension and mea- something to pry against.
idle. suring it are two different matters. There The second method is a variation on
When installing a clutch-drive fan, is a belt-tension checking tool, but it the method used to adjust the rotary A/C
there's no spacer, but the job may still be rarely finds its way into even the most compressor, however this one came first.
difficult because of the way the bolts are complete tool chest. If you happen to It's used for adjusting the two-pistonlocated
behind the fan and clutch-drive have one, by all means use it. Otherwise, compressor belt. Rather than rotating the
assembly. The fan is not fixed, so you'll use the dejlectiorz method for checking accessory, an adjustztble idler pulley ro-