Comp Cams Hi‑Tech Pushrod Length Checker 6.800–7.800 in Black Oxide — Hardened Steel Adjustable Tool

The Comp Cams 7702-1 Hi‑Tech Pushrod Length Checker is an adjustable steel alloy tool that measures pushrod lengths from 6.800" to 7.800" in 0.050" increments with ball‑end contacts for accurate rocker geometry setup.

If you build, assemble, or tune cylinder heads and valvetrain geometry, consistent pushrod length is essential for correct rocker arm contact and reliable valve motion. The 7702‑1 from Comp Cams is made from hardened steel alloy with a black oxide finish to resist corrosion and provide precise, repeatable measurements without the need for expensive calipers or custom gauges.

How does this tool simplify getting the correct pushrod length?

The Hi‑Tech checker offers a quick, repeatable way to verify pushrod length during mock‑up or final assembly. Using the ball ends for seating at the lifter and rocker, you can confirm the point of contact and determine the required pushrod length before final ordering or cutting.

• Adjustable range covers 6.800" to 7.800" in easy 0.050" steps.
• Ball‑ball ends mimic lifter and rocker contact points for realistic fitment.
• Eliminates frequent caliper setups—check length directly in the engine.

What materials and finish ensure long‑term accuracy?

Comp Cams constructs this tool from a precision steel alloy heat treated for stability, then applies a black oxide finish to reduce surface wear and corrosion. The result is a measuring device that maintains dimensional integrity under shop conditions.

• Heat‑treated steel alloy resists bending and wear.
• Black oxide surface minimizes rust and glare for clear readings.
• Ball ends hardened to keep accurate contact geometry over time.

How do you use the Hi‑Tech pushrod checker during engine assembly?

Install the lifters and rocker studs as you will in the finished build, then place the checker between lifter and rocker. Adjust to the best contact point, note the length, and choose or trim the production pushrod to match the measured requirement for ideal rocker geometry.

• Seat ball ends at lifter and rocker contact points to simulate real angles.
• Record the selected increment (6.800"–7.800") to specify pushrod length.
• Repeat across cylinders to confirm uniform rocker geometry before final assembly.

What tolerances and measurement increments are provided?

This model measures in 0.050" increments across its 1.000" total range, giving coarse but practical steps that align with common pushrod length options. For shops that need finer adjustment, this checker quickly identifies the nearest base length before final fine‑tuning.

• Range: 6.800" to 7.800" (1.000" total travel).
• Increment: 0.050" steps for fast selection of standard lengths.
• Ideal as a first‑pass tool to determine baseline lengths prior to precision grinding or ordering.

Who is this for: The Comp Cams 7702‑1 Hi‑Tech Pushrod Length Checker is aimed at performance engine builders, machine shops, hot‑rod enthusiasts, and professional mechanics who need a durable, practical way to determine pushrod length during mock‑up and assembly. It’s especially useful when working with aftermarket rockers, custom valve trains, or when you want consistent geometry across all cylinders without relying solely on calipers or trial‑and‑error.