The Stovebolt Site Forums The Shop Area Engine Shop Chevrolet 235 rocker arm oiling?

The 1962 Chevrolet 235 rear rocker arm assembly is not getting as much oil as the front rocker assembly. Oil is poring out of the front assembly and out of the last rocker arm but not out of the second to last and third to last rocker arms. Also cylinder number one rocker arms have air bubbles coming out them. I had to take the rocker arm assemblies apart and clean sludge out of the shafts and the rocker arm oiling holes. Then reassembled them with rocker arm oil holes facing down. Could the shafts just have excessive wear causing the oil lose to the rear rocker arms?

As long as the rocker arms are wet and getting oil, you are OK. Some center connections are leaky. That can contribute to less at one end or the other. There are some very good posts on just this issue. Use the search function for specifics. Also check out Pre 68 Dave for more details.

Try watching the rockers as you increase the RPM. Not much oil flow takes place at idle. Ideally we would like to see a dribble of oil coming out of each rocker arm top hole at idle.
I don't believe it is a deal breaker if it is a bit sluggish on a few at idle, as long as plenty is coming out of all of the holes as you increase the RPM above idle.
Carl

There are a few nuances that Dave can tell you about. If your rocker assembly is 100% stock without any changes to it, it's probably just a little wear. What everyone said above should help.

Worn rockers can cause oil starvation to individual rockers, as can mismatched years of rockers.
I have a little wright-up on by blog about rocker oiling,
(Link)

Thanks for the information I have several spare sets of rocker arm assemblies. I picked out the best set that the shafts aren't worn out and swapped the 59-62 rocker arms over to new shafts. I will try them out this week and see if it changes anything.