There was a loud clacking noise comming from the pass side valve cover. Opened & noticed the #6 exhaust rocker arm was very loose. I downloaded instructions on how to adjust the rockers & have some questions. It says to crank the engine until the intake rocker comes down halfway, stop & adjust the polynut while spinning the pushrod. As soon as you can't turn the rod anymore turn the locknut 1/2 turn & then your done. One question I have is the pushrods. Before I started I checked some of the other pushrods & I can still turn all of the them. Does that mean they need to be adjusted as well? Also, when bumping the engine, how fast do the rockers move up & down? I'm going to have a neighbor crank the engine, but is it a split second when it closes or it's gradual, as in more than a few seconds of cranking?
Bu the way, these are Edelbrock heads & Jegs Rockers installed around 6-7 months ago.

If the rockers are so tight you can't rotate the pushrod, they are too tight. You should be able to rotate the pushrod on any rocker that is on a closed valve. You just need to tighten them until all the slop is out of the rocker arm, then 1/2 turn or so.

In two different repair books I have they say after 0 lash go 1 full turn. One book is a very old Chilton book that covers Chevelle and the other is How to rebuild Chevy big block engines by Tom Wilson. I've followed this to a tee after just installing my new cam and lifters but have not got the engine back in the car yet. Do you think that one full turn is too tight?
Jody

On my 327 way back when, at 1 full turn the valves floated out at the end of the quarter-so I left them at a quarter turn. Any non-drag cars I adjusted to 1 full turn as valve float was not a problem on the grocery getters.

If the rockers are so tight you can't rotate the pushrod, they are too tight. You should be able to rotate the pushrod on any rocker that is on a closed valve. You just need to tighten them until all the slop is out of the rocker arm, then 1/2 turn or so.

Ok, thanks I read the instructions again & it says when you first feel resistence then go 1/2 turn. Thanks for clarifying. I guess I'll figure out how much the rockers move when I crank the engine over.

i go 1/2 turn...you got to make sure that when your feeling the slack ...not running ....that the lifter has not bleed down..if so ,,you can feel the p/rod till the lacks out ,,if its bled down you you adjust when plunger is down it will pump up to tight ..,,,hard to explain.....i adjust them not running adjust intake when exhast vavle just opens ..and the exhast when intake is almost closed...

i go 1/2 turn...you got to make sure that when your feeling the slack ...not running ....that the lifter has not bleed down..if so ,,you can feel the p/rod till the lacks out ,,if its bled down you you adjust when plunger is down it will pump up to tight ..,,,hard to explain.....i adjust them not running adjust intake when exhast vavle just opens ..and the exhast when intake is almost closed...

Is there a way I can tell if the oil has bled down. I am going to tackle this tomorrow, so hopefully I 'll be fully prepared & won't have to log back on to the computer to heck something. It may have been mentioned in the post, but I havn't done much work on engines before & this is the first time I have ever adjusted rockers.

yes ..if you can push down on the rocker and it goes down it bleed down,,cause sometime after adjusting a few they bleed off..just rember..take the pushrod feel it...when you adjust them not runnig like i said above..if it dont push down them lifter is not bled down..if it is bled down...just barley push the p/rod up and down..they 1/2 turn ...its easier if you got polylocks you can feel it alot better.