Problems installing new pushrods!
I’m in the process of installing my custom length pushrods and Harland Sharp Roller Rockers onto my 383 with upgraded edelbrock rpm performer heads. I think there are a couple problems I’ve run into where I could use the expertise on the boards.
First I had custom pushrods made because my OEM pushrods I was using with my older 915 heads aren’t long enough for the new Eddie heads. So now I’m have set up my rockers dropped in my used hydraulic lifters and custom pushrods. I was in the process of getting all the slack out for the rockers and was going to set the lash.
Now here is where I have issues. I noticed that on a couple of the lifters they feel very spongy and move up and down quite a bit. When I tightened them down I had to drop the pivot point on the rocker so low that it looks as if they won’t work and I can’t lock in the lash. On the other cylinders where the lifters don’t feel spongy the pivot ball only shows about 3 threads.
Is it because the lifters have been out for the car for some time and they are not pumped up? Or is that the lifters are going bad?
Should I order longer pushrods so that there are less threads above the pivot ball when setting lash?
I have included a couple photos showing how far I had to adjust to accommodate the spongy lifters and also the setting on the lifters that felt solid.
I just want to get the motor back together and keep running into obstacles as I am trying to learn. Thanks
Carl
I’m in the process of installing my custom length pushrods and Harland Sharp Roller Rockers onto my 383 with upgraded edelbrock rpm performer heads. I think there are a couple problems I’ve run into where I could use the expertise on the boards.
First I had custom pushrods made because my OEM pushrods I was using with my older 915 heads aren’t long enough for the new Eddie heads. So now I’m have set up my rockers dropped in my used hydraulic lifters and custom pushrods. I was in the process of getting all the slack out for the rockers and was going to set the lash.
Now here is where I have issues. I noticed that on a couple of the lifters they feel very spongy and move up and down quite a bit. When I tightened them down I had to drop the pivot point on the rocker so low that it looks as if they won’t work and I can’t lock in the lash. On the other cylinders where the lifters don’t feel spongy the pivot ball only shows about 3 threads.
Is it because the lifters have been out for the car for some time and they are not pumped up? Or is that the lifters are going bad?
Should I order longer pushrods so that there are less threads above the pivot ball when setting lash?
I have included a couple photos showing how far I had to adjust to accommodate the spongy lifters and also the setting on the lifters that felt solid.
I just want to get the motor back together and keep running into obstacles as I am trying to learn. Thanks
Carl
