Discussion Starter · #1 ·
Hi all, currently I have 7/16 pushrods in my 454 with a comp cams XE268h cam. (781 large oval port heads) The setup is working well with the exception of the lifter ticking and sewing machine sound it makes. I’ve adjusted the rockers countless times to try and get the noise to stop but there always seems to be a slight ticking sound. I was wondering if maybe the pushrods were coming in contact with the heads or block. Has anyone else had this problem? Would it be worth it to change out the guide plates and pushrods to 3/8 inch? I spoke with the Comp Cams tech and he said that this particular cam makes that noise on some cars, but I still think it should be quieter then it is.