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![Piston Top Dead Center Locator Tool [Screws into the Spark Plug Hole]](https://www.jegs.com/images/mini_750/700/778/778-66792.jpg)
Vehicle Info NeededPROFORMPART NUMBER: 778-66792
Piston Top Dead Center Locator Tool [Screws into the Spark Plug Hole]
$1399
9 left in stock
Ships on Nov 16, 2026
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Cylinder Head Installed Top Dead Center Locators
Piston Top Dead Center LocatorUniversal Fit Screws into the Spark Plug Hole Gives the Piston a Positive Stop For Accurately Locating Top Dead Center Sold Individually
Finding true top dead center by feeling for the piston with a screwdriver gets you within a few degrees, which is not good enough for degreeing a cam or verifying a timing mark. A positive stop lets you bump the crank against it from both directions and split the difference, which finds TDC exactly.
Proform 66792 Piston Top Dead Center Locator Features:
- Screws into the spark plug hole.
- Provides a positive stop for the piston.
- Locates true top dead center accurately by approaching from both directions.
- Suits camshaft degreeing and timing mark verification.
- Sold individually.
- The Proform Top Dead Center Locators are used to accurately determine and ensure your piston is at top dead center when you are cam indexing, adjusting valves, or installing the distributor. There are two styles of TDC (Top Dead Center) locators; one for use with the cylinder head installed that threads into the spark plug hole and a ''Bridge'' style for use with the cylinder head removed that bolts over the piston cylinder bore.Features:
- Two styles available for use with the cylinder head installed or removed
- Allows accurate distributor installation, valvtrain adjustments, camshaft degree measurements and ignition timing adjustment.
Part TypePiston Top Dead Center Locator Tool
Product LineProform Top Dead Center Locators
BrandPROFORM
Package Height0.9
Package Width4.5
Package Length7.0
Weight0.15 PG
Part CategoryAccessories
Tool TypeTDC Locators
QuantitySold Individually
Part FitmentUniversal
Vendor Part Number66792
Package Qty1
Package TypeEA
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