New Heads , New Noise

My new Edelbrock heads are on. I am very pleased so far with the results but will have numbers from the dyno soon.

Problem is that after it has idled for about a minute, I get a "rattle" from around the Number 2 cylinder tword the center of the intake. It goes completly away with any RPMs added and I don't hear it while driving at all. I can not tell that there is any other problem, like a vibration to go with it. I adjusted the valves from zero lash and added 1/2 turn and checked the guide plates tp make sure they were lined up properly. I could see no issues when I turned over the engine and watched the rockers. I also rechecked the locks on the roller rocker adjust nuts.

I can only come up with a lifter that is bleeding down at idle.

Any ideas before I tear back in???

Yes, I have the old style block and no I did not burp the cooling system. I did fill it slowly and gave it time to bleed air. I had to drill the steam holes in the block as well. Did you figure out the problem?

Thanks,

I read the old thread. I'll install a filler neck for flushong and try to make sure there is no air trapped. Are you happy with your heads otherwise?