Push Rod Length Checker Chrysler S/B 6.90-8.350

The Push Rod Length Checker Chrysler S/B 6.90-8.350 is an essential precision tool for engine builders and mechanics performing valve train assembly specifically on Chrysler small-block applications, particularly the 340 and 360 models. This specialized checker eliminates guesswork during pushrod selection, a critical step that directly impacts valve lash geometry, rocker arm geometry, and overall engine reliability.

Without proper pushrod length, you risk inadequate valve clearance or excessive preload on hydraulic lifters, both of which can lead to catastrophic valve train failure. The checker measures the effective length range of pushrods from 6.90 inches to 8.350 inches, ensuring that your chosen pushrod sits in the correct geometric plane relative to the rocker arm tip and lifter seat, thereby preventing binding and optimizing contact angles.

Engine builders, machine shops, and restorers will find this tool invaluable for ensuring that their valve train operates within manufacturer specifications. Its compact design—weighing just 0.24 lbs and measuring 5.7 x 1.1 x 12.85 inches—makes it portable enough for engine shop benches or field rebuilds, reflecting decades of valve train engineering expertise.