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 MANUALSFORD1987ECONOLINE E250, VAN WINDOW EXTENDED, 4.9 YREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEADJUSTMENTTUNE-UP - 6-CYLADJUSTMENTSVALVE CLEARANCE
1987 Ford Econoline E250, Van Window Extended, 4.9 Y
Valve Clearance
1987 Ford Econoline E250, Van Window Extended, 4.9 YSECTION Valve Clearance
NOTE:
If necessary, push rods are available .060" (1.52 mm) longer or shorter than standard to adjust valve clearance. To determine whether a shorter or longer push rod is necessary, use the following steps.
- Install an auxiliary starter switch. Divide crankshaft damper into 3 equal parts by making 3 chalk marks on damper (spaced 120° apart), including and starting with timing mark.
- With No. 1 piston at TDC (at end of compression stroke), tighten No. 1 intake and exhaust valve rocker arm bolts to 17-23 ft. lbs. (24-31 N.m). Using Tappet Bleed Down Wrench (T70P-6513-A), slowly supply pressure to bleed down lifter until plunger is completely bottomed.
- Hold lifter in this position and check clearance between rocker arm and valve stem tip with feeler gauge. If clearance is not to specification, install longer or shorter push rod.
- Rotate crankshaft 1/3 turn at a time (in direction of rotation). Repeat steps 2) and 3) for remaining set of valves. Adjust valves in firing order sequence.
VALVE CLEARANCE SPECIFICATIONS
| Application | Clearance | ||
|---|---|---|---|
| 4.9L | (1) .125-.175" (3.18-4.45 mm) | ||
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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.