Pushrod measuring issue
I’ll try to keep this short winded as possible.
So I’m finishing up my 360 the other night and I went to adjust the valves only to find out the pushrods are too long as in the push rod will hit the rocker arm with the adjuster taken out too long. Back story is I’m using a set of heads from a buddy that haven’t changed since his build to mine. We both have nearly the identical build (same cam company and nearly identical profile even) so he figured the pushrods he used would work just fine with my engine. Guess that assumption was wrong and only thing we could figure out is my block got decked further than his did. Machine shop didn’t measure the before/after deck height so there’s no info on that.
I bought a Comp cams pushrod checker and the other night I checked the length. So I put a lifter on the base circle of the lobe, put 1.5 threads sticking below the rocker arm, snugged the rocker shaft down, and turned my checker pushrod until I had .020” valve lash. To my surprise my checker pushrod was only .020” shorter than the pushrods I was using. I double checked my work and checked the exhaust as well, same result. Solid flat tappet cam FYI.
From what I said can anyone help me out or point me in a different direction? The guys I talked to at Smith Bros Pushrods were in the same boat as me.
I’ll try to keep this short winded as possible.
So I’m finishing up my 360 the other night and I went to adjust the valves only to find out the pushrods are too long as in the push rod will hit the rocker arm with the adjuster taken out too long. Back story is I’m using a set of heads from a buddy that haven’t changed since his build to mine. We both have nearly the identical build (same cam company and nearly identical profile even) so he figured the pushrods he used would work just fine with my engine. Guess that assumption was wrong and only thing we could figure out is my block got decked further than his did. Machine shop didn’t measure the before/after deck height so there’s no info on that.
I bought a Comp cams pushrod checker and the other night I checked the length. So I put a lifter on the base circle of the lobe, put 1.5 threads sticking below the rocker arm, snugged the rocker shaft down, and turned my checker pushrod until I had .020” valve lash. To my surprise my checker pushrod was only .020” shorter than the pushrods I was using. I double checked my work and checked the exhaust as well, same result. Solid flat tappet cam FYI.
From what I said can anyone help me out or point me in a different direction? The guys I talked to at Smith Bros Pushrods were in the same boat as me.
