Broken rocker arms two weekends in a row
I run a solid roller setup that is [email protected] and lift at the valve is around .665. I broke a HS intake rocker on my W2 setup on drag week 2021. I was cruising down the highway at 3500RPM and I heard it then it picked up a miss. I did not have a spare but our timing was good because we called HS, they put us through to Randy and he drove our rocker arms to UPS himself and had them at our hotel at 8AM the next morning.
I really didn't look anything over until a month or more after I fixed it at the holiday inn. It appears the shaft had extreme wear and it eventually bound up and broke the rocker arm. The bearings were in fine shape but the shaft was pretty worn. I also found the same shaft wear on the other side of the engine, oddly enough both shafts were worn the most CLOSEST to where the oil enters, that one is a head scratcher for me. I sent the worn shafts and broken pieces to HS and they replaced them under warranty. Now I carry a shaft, both intake rockers, and an exhaust rocker as spares.
How does your adjuster look? HS only likes for 1-2 threads to stick out, if you had more than that I could see it adding stress.
I zip tied the bearings over the oil holes and drove it 45 minutes to the hotel on 7 cylinders.
I run a solid roller setup that is [email protected] and lift at the valve is around .665. I broke a HS intake rocker on my W2 setup on drag week 2021. I was cruising down the highway at 3500RPM and I heard it then it picked up a miss. I did not have a spare but our timing was good because we called HS, they put us through to Randy and he drove our rocker arms to UPS himself and had them at our hotel at 8AM the next morning.
I really didn't look anything over until a month or more after I fixed it at the holiday inn. It appears the shaft had extreme wear and it eventually bound up and broke the rocker arm. The bearings were in fine shape but the shaft was pretty worn. I also found the same shaft wear on the other side of the engine, oddly enough both shafts were worn the most CLOSEST to where the oil enters, that one is a head scratcher for me. I sent the worn shafts and broken pieces to HS and they replaced them under warranty. Now I carry a shaft, both intake rockers, and an exhaust rocker as spares.
How does your adjuster look? HS only likes for 1-2 threads to stick out, if you had more than that I could see it adding stress.
I zip tied the bearings over the oil holes and drove it 45 minutes to the hotel on 7 cylinders.
