Ford CSG-850 / WSG-858 — Valve Clearance Check — 5.0L V-8 Engine
Adjustments · Valve train / hydraulic valve lifters
For the Ford CSG-850 / WSG-858, from the Ford service manual.
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Procedure
- Install auxiliary starter switch; crank with ignition OFF until No. 1 piston is TDC after compression.
- Position hydraulic lifter compressor tool on rocker arm; bleed lifter until plunger fully bottomed.
- Check available clearance between rocker arm and valve stem tip with a feeler gauge.
- If clearance is less than specifications, install a shorter push rod; if greater, install a longer push rod.
- At Position 1 check No. 1, 7, 8 intake and No. 1, 5, 4 exhaust valves.
- Rotate to Position 2; check No. 5, 4 intake and No. 2, 6 exhaust.
- Rotate to Position 3; check No. 2, 3, 6 intake and No. 7, 3, 8 exhaust.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Feeler gauge width must not exceed 3/8 inch
Source: Ford service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.