12mm Universal Valve Adjustment Tool
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Schley Products, Inc 12mm Universal Valve Adjustment Tool

Part No. SCH88800 Warranty Details  
Quantity  Add to Cart
Designed for a wide variety of cars with 12mm jam nut valve adjustment screws. This two in one tool features a window in its socket so the technician can see the position of the screwdriver blade holding the adjustment screw as the jam nut is tightened. This visual contact in addition to the feel of holding the screwdriver allows for quicker valve adjustment times as the technician can hold the adjustment screw exactly where he wants it. The unique handle pivots from one side to the other, so the window is always visible. Made from heat treated chrome vanadium steel this tool comes with a soft grip handle
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Schley Products, Inc12mm Universal Valve Adjustment Tool

(based on 1 review)

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Reviewed by 1 customer

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12mm Valve Adjusting Tool


from Jacksonville

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3 or more reviews submitted


  • Easy to use
  • Made in USA
  • Precise


  • Black Steel Vs Polished
  • Not Available In-store

Best Uses

  • Regular Maintenance
  • Specialty Tool

Comments about Schley Products, Inc 12mm Universal Valve Adjustment Tool:

If you have an Acura (or if you have a valve train with 12mm valve jam nuts, you NEED this tool.

I had a deteriorating valve cover gasket that I replaced with a new Fel-Pro (VS 50362 R). While replacing the gasket, I checked the valve tolerance with a feeler gauge--some needed adjusting. I initially used a 12mm box wrench and flat head screwdriver. At least two of the valves made more noise than before & the car felt sluggish.

A week later, this part arrived so that I could do it right. The Schley valve adjusting tool (SCH88800) made setting the valves faster and easier. I didn't spend as much time leaning over the engine bay so my back didn't hurt as much. Win-win.

When you finish, double-check clearances with feeler gauge and torque valve nuts (gently) with a torque wrench. Clean all head and valve cover mating surfaces thoroughly and add Hondabond (82194) to the sharp corners per the repair manual. Install valve cover flat and (gently) torque valve cover bolts in proper sequence. Congratulations, you just set your valves and replaced your vc gasket.

Last thought: this tool is black steel with red handles, not CrV or polished steel like typical wrenches. Keep it in a dry place and it will be alright.

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Do you have questions about this product?


Ask a question, get answers from real customers and in-house experts. For further assistance, please review your support options on our Contact Us page.

2 Questions | 3 Answers
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  • Q:

    Is this Schley tool made in the USA?
    Asked on 2/24/2014 by Joe from Jacksonville, FL

    2 answers



      Hi Joe, glad to assist you! Advance Auto Parts does sell Made in the USA products as well as products manufactured from many other countries in order to keep our pricing competitive. Please also keep in mind that many suppliers have multiple manufacturing plants that could result in different countries of origin for the same part.

      Answered on 2/25/2014 by Steve from AAP
    • A:

      Yes. The Schley SCH88800 is made in the USA. Disregard unhelpful, generic comments.

      Answered on 3/14/2014 by JC from Florida
  • Q:

    does this tool do the 16 valve 1.6l engine.if not can you help find the right valve adjustment tool. thank you
    Asked on 3/13/2012 by Anonymous

    1 answer



      This Schley Products, Inc Valve Adjustment Part number SCH88800 is designed for a wide variety of cars with 12mm jam nut valve adjustment screws. This part is universal and not a direct fit for your vehicle.

      Answered on 3/14/2012 by Steve from AAP
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