TDC Indicator Standard 6.25″ (14mm Thread)

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TDC Indicator Standard 6.25″ (14mm Thread)


TDC Indicator Standard 6.25″ (14mm Thread)

(19 customer reviews)

Stop the guessing and easily set a piston to TDC.

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Distributor Information

Innovative Products of America® Incorporated is an OEM (Original Equipment Manufacturer) who only sells through traditional three step distribution. Our products are available through most professional tool distributors, AG/construction equipment dealers, farm supply stores, MRO and industrial supply companies.
To locate a distributor near you, please call 888-786-7899 or email us.

If you do not have access to a local distributor, you may buy directly from our website.

Price $31.59


Enables a Technician to Accurately Set a Piston to Top Dead Center (TDC).

Just remove the spark plug, screw in the gauge and rotate the engine while observing the radial marks on the sliding shaft and note the top of the piston stroke.


Features and Benefits:

  • Accurately displays piston movement
  • Installs as easily as a spark plug
  • 6 1/4″ long (14 mm thread)
  • 1/8″ gradient marks
  • Made of 1144 steel alloy with a stainless steel spring






• DO NOT use on an engine that has an acute spark plug angle relative to the flat top of the piston or you may bend the TDC shafts.


19 reviews for TDC Indicator Standard 6.25″ (14mm Thread)

  1. Jim

    Works as described I used this TDC indicator on my Ford 302 and it worked just fine. What I like the best about it is, there are tick marks on the spring shaft to identify when TDC is reached, very helpful.

  2. Philippe B.

    Very accurate Work good

  3. Phils2888

    Works well. Excellent quality and must have tool for engine builders.

  4. Juan Wong


  5. larry j brendle

    Great product As indicated

  6. Amazon Customer

    Easy to use Found TDS easy

  7. chris volpe

    Perfect Worked great

  8. Jeff P.

    Would recommend this to everyone who is looking for TDC Very easy to find top dead center.

  9. Michael R.

    Top dead center tool I love this, I work on a fleet of standby generators and am constantly performing valve adjustments in the field. It’s a God send. I know that the cylinders are exactly where they need to be for proper adjustment. The side of the slide is turned with resesed marks that can’t ware off in 1/8 inch increments (very important for compression release engines). I just wish the tube the tool came in had a cap of some sort.

  10. Rick Bewski

    Did it’s job, good quality! Did it’s job great quality

  11. Gerald Alberda

    great way to find top dead centerll and check timing marks on damper easy to use and great dircetions

  12. KB

    Great tool Reasonable priced

  13. Andy S

    Works Great For Finding TDC (in combination with a whistle) This 14mm tool works great for finding top dead center. I insert a whistle in the spark plug hole first to determine the compression stroke. As soon as it whistles I insert this indicator tool to find the exact top dead center. Perfect tool to prepare for a cylinder leak down test.

  14. chip

    Appears good solid and well designed I haven’t been able to use it yet, but it looks like a good piece of equipment. Haven’t tested the metallurgy yet, but in the hand seems to fit the bill.

  15. Pat Hedrick

    TDC tool Very well built and easy way to find top dead center.

  16. Jorge F. Rodriguez

    good accurate

  17. Amazon Customer

    Works well with GM 5.7 Vortec. This worked very well for a 5.7 vortec.

  18. Junior

    Solid tool , works great!!! For those that are wondering if this tool will work for an LS1 5.3 it does , it worked great actually. Get yourself one it’s worth the money.

  19. W. Nichols

    In 50 years of working on cars, I have never had an easier way to find “top dead center”. This makes finding top dead center so easy and fast. If you want a way to save time and frustration the next time you plan on any work requiring tdc, get this.

Only logged in customers who have purchased this product may leave a review.

Materials: 1144 Steel Alloy, Stainless Steel Spring
Package Weight: .33 lbs.
Package Dimensions: 10" L x 1" W x 1" H
Warranty: Lifetime Warranty

We value your business. Have a question or need technical support? Call 845-679-4500 or email [email protected] When contacting us, please be sure to reference the part number or product series you're interested in.
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