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Home›Repair guides›Ford›Valve Clearance — Tappet Bleed Down Check

Ford LSG 875 — Valve Clearance — Tappet Bleed Down Check

Adjustments · Hydraulic valve tappets, push rods and rocker arms

For the Ford LSG 875, from the Ford service manual.

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Procedure

  1. Crank engine with ignition off until No. 1 piston is on TDC after compression stroke.
  2. Install Tappet Bleed Down Wrench T71B-6513-B or equivalent on the rocker arm.
  3. Slowly apply pressure to bleed down the hydraulic tappet until plunger is completely bottomed.
  4. Hold tappet and check clearance between rocker arm and valve stem tip with a feeler gauge.
  5. If clearance is less than specifications, install a shorter push rod.
  6. If clearance is greater than specifications, install a longer push rod.

Tools required

  • Tappet Bleed Down Wrench T71B-6513-B Amazon
  • Feeler gauge Amazon

Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.

Specs & values

  • Valve lifter collapsed gap allowable 0.075-0.175 inch; desirable 0.100-0.150 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.

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