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ENGINE COMPONENTS – TECH TIP CHECKING CAMSHAFT TIMING In order to check cam timing, you will need Slowly rotate the crankshaft backwards Start rotating the crank again until the lifter some specialty tools. You will need a degree counterclockwise until the same .030" below is .030" below the maximum travel on the wheel, dial indicator with magnetic base and a TDC is seen on the dial indicator. Again, closing side of the cam lobe. Note the degree heavy wire for a timing pointer. Choose a large note the degree wheel reading. Next, rotate wheel reading. The AVERAGE of the two diameter wheel as they are easier to read and the degree wheel so the pointer falls at the readings taken is the location of maximum more durable. Some manufacturers sell kits AVERAGE of the two observed readings. intake lift ATDC (After Top Dead Center). with a rigid, adjustable pointer that mounts Lastly, relocate the pointer exactly over the easily to the front of the engine. The other zero reading of the degree wheel, and you Compare this to the installation option is a heavy wire that is mounted to the will have perfectly dialed in TDC. Redo the recommendation of the cam manufacturer, block and bent into position. procedure to satisfy yourself that the setting as it should be relatively close. The timing is correct, and then proceed to measure should be within one degree of the Start with placing the dial indicator and stand cam timing. recommended setting. If there is a need to on the right side block deck to measure travel adjust the timing, FRPP has multi-index of the CENTER of piston number 1 (passenger Install the number 1 cylinder intake lifter in timing chain sets which have nine keyways side, front). Bring number 1 to TDC (Top Dead the proper lifter bore. Position the dial indicator to adjust cam timing. Center) by observing when the dial indicator so the tip is on the edge of the lifter or in the stops moving. Bolt the degree wheel to the center of the lifter. Extensions for the dial NOTE: Many cam manufacturers provide front of the crankshaft, and attach the pointer indicator may be necessary. Carefully line up .050" lift cam timing information. To check to the front of the block so that the pointer the dial indicator so the travel of the indicator this, reset the dial indicator to zero with is positioned at the zero degree reading on is linear to the lifter. Rotate the engine and the lifter at zero lift. Then rotate the crank the wheel. To find exact TDC, first set the observe the action of the lifter. Make sure the in the clockwise direction until .050" lift dial indicator to zero at the point of highest fully open and fully closed positions of the is shown on the indicator. Note the intake piston travel. Next, turn the crankshaft lifter are within the travel range of the dial open degrees. Then proceed clockwise until counterclockwise about 90 degrees. Then, indicator. Rotate the crankshaft until the lifter the intake closing at .050" lift is reached. slowly rotate the crankshaft clockwise (the is at the highest point of its travel, and set the Compare the readings to the cam card. normal direction of engine rotation) until the dial indicator to zero. Continue rotating the Together with the maximum lift information, indicator is .030" below the TDC (zero) setting. engine clockwise until the lifter starts to travel this data will tell you where the cam Note the reading of the degree wheel at this up again. Slowly continue until the lifter is is degreed. Once corrections are made, point. Then, continue turning the crankshaft .030" below the point of maximum travel, measure the cam timing once more to clockwise past the TDC about 90 degrees. and note the reading of the degree wheel. verify the fix was correct. For important information about the proper usage of performance parts, please see page 14. 118 Techline (800) FORD788 See pages 286-292 for important safety, emissions and warranty information.


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