Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1991CUTAWAY 5.8 H, C6REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROLS - ADJUSTMENTSADJUSTMENTSVALVE CLEARANCE5.8L VALVE CLEARANCE ADJUSTMENT
1991 Ford Cutaway 5.8 H, C6
5.8L Valve Clearance Adjustment
1991 Ford Cutaway 5.8 H, C6SECTION 5.8L Valve Clearance Adjustment
NOTE:
Hydraulic valve lifters are used; no valve adjustment is required. If valve clearance is incorrect, use oversize or undersize push rod to obtain correct clearance.
- Rotate crankshaft in normal operation direction until No. 1 cylinder is at TDC of compression stroke. Using Tappet Bleed Down Wrench (T71P-6513-B), apply pressure to No. 1 intake tappet until lifter is completely bottomed.
- Hold tappet in this position while measuring clearance between tappet and valve stem. Record measurement. Repeat this procedure for intake valves No. 4 and No. 8, and exhaust valves No. 1, No. 3 and No. 7.
- Rotate crankshaft 180 degrees (1/2 turn). Bleed lifter and check intake valves No. 3 and No. 7, and exhaust valves No. 2 and No. 6. Rotate crankshaft 270 degrees (3/4 turn). Bleed lifter down and check intake valves No. 2, No. 5 and No. 6, and exhaust valves No. 4, No. 5 and No. 8. Record measurement and compare it to specification. See 5.8L COLLAPSED VALVE LIFTER CLEARANCE . If clearance is not within specification, use shorter or longer push rod to obtain correct clearance.
5.8L COLLAPSED VALVE LIFTER CLEARANCE
| Application | In. (mm) |
|---|---|
| Allowable | .098-.198 (2.48-5.03) |
| Desired | .123-.173 (3.12-4.39) |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.