coupe
03-23-2005, 09:06 AM
Took some pics while seting up stud-mount rockers. Here's a way I check the pushrod length:
I mark the top with a sharpie; then place the rocker down on the pushrod and spin the roller-tip to make a mark in the sharpie ink. This shows me the location of the tip when the lifter is on the base-circle. This witness mark should be at or just outside of the inner 1/3 of the valve stem top (see pic). This will allow it to move out over the middle when the cam lobe moves the valvetrain.
This area is the best for lowest side-loading of the valve on the guide and will increase longevity. If the mark is too far outside, get a shorter pushrod and vice-versa. :nice: Anyone else feel free to add experiences/recommendations.
I mark the top with a sharpie; then place the rocker down on the pushrod and spin the roller-tip to make a mark in the sharpie ink. This shows me the location of the tip when the lifter is on the base-circle. This witness mark should be at or just outside of the inner 1/3 of the valve stem top (see pic). This will allow it to move out over the middle when the cam lobe moves the valvetrain.
This area is the best for lowest side-loading of the valve on the guide and will increase longevity. If the mark is too far outside, get a shorter pushrod and vice-versa. :nice: Anyone else feel free to add experiences/recommendations.