Review on COMP Cams 7702-1 Hi-Tech Pushrod Length Checker 6.800"-7.800" Range by Andrew Lyons

Do not count turns to determine rod length. Just let it run until there is no more rocker and use a caliper to measure the distance between the screw surfaces. The reason I only gave it 3 stars is because the comp cam website says this tool is 8.8 inches when folded. Assuming this to be true, I ran a rod length test as recommended by Moses Laddell for the Jeep engine and added the recommended .040" to the Jeep engine. Achieve desired jack preload. After that I decided to measure the overall length before ordering new rods (the old school adage is 'measure twice, cut once') and added 0.025 as if nothing had happened. This tool measures an actual length of 8.825 inches when folded, which is huge when you're dealing with thousandths of an inch on something that needs to be accurate! So for the Jeep, do the following: 1) Install the rocker arm assembly for the cylinder you want, making sure the cylinder is at TDC (Top Dead Center) 3) Extend the test tool by sliding the top against the Turn clockwise until it stops between the push rod and rocker arm.4) Measure the distance between the surfaces of the bolts with a scale or digital caliper. 5) Add the caliper measurement to the length of the verification tool (8.825 inches using the tool I received). So A + 8.825 = rod length before ram preload. 6) Add the stroke preload into the equation (0.040" in my case) and the boom and you have your desired push rod length. MEASURE TWICE, ORDER PARTS ONCE!