Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com - View Single Post - Pushrod length measuring and zero lash? What lifter preload?

danhr · 01-07-2011, 03:19 PM

Are you using heads that are milled?

Stock thickness head gaskets?

You are using the correct method of measuring pushrod length. It seems like you have done it correctly.

How does the wipe pattern look on the top of the valve?

if that checks out, I would just go with the 7.375 pushrod.... I'd opt for that over the 7.35 pushrod because a little too much preload is MUCH better than a little less preload. Having a little too much, and the plunger on the lifter will just be a little further down.... too short and you will have valve float.

01-07-2011, 03:19 PM	#2
danhr BAMF SS Drives: 2016 Camaro 1SS A8 Join Date: Mar 2010 Location: Ford City, PA Posts: 3,024	Are you using heads that are milled? Stock thickness head gaskets? You are using the correct method of measuring pushrod length. It seems like you have done it correctly. How does the wipe pattern look on the top of the valve? if that checks out, I would just go with the 7.375 pushrod.... I'd opt for that over the 7.35 pushrod because a little too much preload is MUCH better than a little less preload. Having a little too much, and the plunger on the lifter will just be a little further down.... too short and you will have valve float. __________________ 2016 1SS A8: FBO + Circle D + P1X + Meth + Tuned by Pray Performance Stock Longblock 800 SAE rwhp. 9.4 @ 145 mph.