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

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A simple check to make sure pistons are in the right holes and in the right direction-rod numbers pointing toward their cylinder bank and<br />

piston arrows or notches pointing forward. These pistons are numbered because they were fitted to the bores to obtain consistent pistonto-bore<br />

clearances. Even the most accurate pistons or bores are not exactly the same diameter, but don't think you have to do this<br />

because fitting pistons is not a standard rebuilding procedure.<br />

Checking connecrlng-roa slae clearance. It<br />

should be 0.010-0.020 inch with a maximum<br />

allowable clearance <strong>of</strong> 0.023 inch.<br />

Align crank and cam like this when installing<br />

timing chain and sprockets. Crankshaft<br />

key is slightly left <strong>of</strong> straight-up.<br />

With crankshaft sprocket and damper bolt and washer on crank end, fit cam sprocket and<br />

chain to crank sprocket so timing marks line up. Sllde sprocket-and-chain assembly back<br />

so cam sprocket engages camshaft nose. It's going to be tight if you are installing a new<br />

chain and sprockets. Fully engage cam sprocket with its drive pin by turning crankshaft<br />

clockwise whlle pushing back on cam sprocket.<br />

Install the Fuel-Pump Cam-Secure the<br />

camshaft sprocket, making sure you install<br />

the fuel-pump cam, or eccentric between<br />

the sprocket and the attaching bolt and<br />

washer. There are two basic types <strong>of</strong> cams,<br />

the one-piece and the two-piece. One-piece<br />

cams were used on the early <strong>429</strong>s until<br />

they changed to the two-piece design<br />

during the 1971 model year. <strong>429</strong>CJ, SCJ<br />

and Police engines continued to use the<br />

one-piece cam. The Police version <strong>of</strong> the<br />

460 as well as <strong>429</strong>1460s installed in F150<br />

or larger trucks also use the one-piece<br />

design. All other fuel-pump cams are the<br />

two-piece design.<br />

The difference between these two fuelpump<br />

cams is the fuel-pump actuating<br />

arm slides against the one-piece cam<br />

much in the sqme way a lifter slides<br />

against its cam lobe. The outer ring <strong>of</strong><br />

the two-piece cam rotates OII its inner<br />

piece, reducing sliding action between the<br />

fuel-pump arm and the cam. Sliding action<br />

is not harmful to the cam or arm.The twopiece<br />

type is less costly to manufacture,<br />

which is why the change was made.<br />

As opposed to most one-piece fuelpump<br />

cams for other <strong>Ford</strong> engines, the<br />

<strong>429</strong>1460 types doesn't depend on the<br />

camshaft drive pin to locate or drive it.<br />

It depends on the clamping force <strong>of</strong> the<br />

camshaft-sprocket bolt. Consequently it<br />

only has one hole in it. This doesn't present<br />

any particular problem unless the<br />

bolt loosens. If this happens, the cam<br />

rotates on the bolt rather than against the<br />

fuel-pump arm and no fuel is pumped to<br />

the carburetor. In a way this is a good<br />

feature because it brings attention to a<br />

bigger problem-the loose bolt.<br />

Unlike the one-piece cam, the twopiece<br />

locates to the cam sprocket with a<br />

ENGINE ASSEMSLY 107

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