Adjust valves

1984 GMC SIERRA
108 MILES • 6 CYL • 2WD • AUTOMATIC
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GRAYTA
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  • 13 POSTS
How do I adjust the valves on a 1984 GMC Sierra with a 250 straight 6 engine, automatic trans?
Jun 17, 2011 at 7:40 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
You can go straight down the cylinders-loosen it till it clatters then tighten it till it stops and then 1 full turn or you can follow the firing order-which ever is clever
Jun 17, 2011 at 7:45 PM
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