Hi everyone
I've been trying to get my re-built 351w started and its not going well at all. I'm using the original rocker arms and when trying to get the motor started for the first time one of the rocker arms broke. It broke on the pushrod side. I replaced it with a new one. Tried to start it again and this time it broke on the spring side. Same cylinder same valve (number 2 cylinder exhaust). Both times I had an exhaust backfire. Would a backfire cause the rocker arm to break? Does what side it breaks on tell me anything? I find it weird to have two rocker arms break on the same valve. What else could cause them to break? I just put the motor together and haven't had it running more than 10 mins. Forgot to add that the pushrod is straight.
I've been trying to get my re-built 351w started and its not going well at all. I'm using the original rocker arms and when trying to get the motor started for the first time one of the rocker arms broke. It broke on the pushrod side. I replaced it with a new one. Tried to start it again and this time it broke on the spring side. Same cylinder same valve (number 2 cylinder exhaust). Both times I had an exhaust backfire. Would a backfire cause the rocker arm to break? Does what side it breaks on tell me anything? I find it weird to have two rocker arms break on the same valve. What else could cause them to break? I just put the motor together and haven't had it running more than 10 mins. Forgot to add that the pushrod is straight.