F 250 2WD HD Pickup V8-7.3L DSL Turbo VIN F (1997)
3. Position the dial indicator which comes with the machine at the heel of the cam that you are going to check.
4. Zero the dial indicator.
5. Slowly turn the camshaft until the point of the dial indicator is on the tip of the cam.
6. Read the dial indicator. This is your cam lobe lift.
7. Check the lobe lift against the specifications. If any cam is excessively worn, the camshaft and valve tappet will have to be replaced.
Lobe Lift Inspection
1. Inspect camshaft.
2. Measure the distance of each cam at the major diameter.
3. Measure the distance of each cam at the minor diameter.
4. For each cam, subtract the minor diameter from the major diameter. The result for each lobe is the lobe lift.
5. Check the lobe lift for each cam against the specifications.
6. If any cam is worn excessively, the camshaft and valve tappet will have to be replaced.
Cleaning and Inspection
CLEANING
1. If not done as part of engine disassembly, remove camshaft center bearing or gear from camshaft and camshaft from engine.
2. Clean the camshaft in an appropriate solvent and wipe it dry.
3. Remove light scuffs, scores, or nicks from the camshaft machined surfaces with an oil stone.
INSPECTION
Inspect the camshaft journals and lobes for scoring and signs of abnormal wear.
Lobe pitting, except in the general area of the lobe toe, is not detrimental to the operation of the camshaft. Do not replace the camshaft unless lobe lift
loss has exceeded the specifications or pitting has occurred in the lobe lift area.
End Play
1. Push camshaft toward rear of engine. Install Dial Indicator with Bracketry TOOL-4201-C or equivalent so indicator point is on camshaft sprocket
attaching bolt.
CAUTION: Prying against the camshaft gear with the valve train load on the camshaft can break or damage the gear. Therefore, the rocker arm