Help with Final adjustments
 

I have had a reasonable difficult time adjusting my rockers. It seemed that every time I adjusted the rockers they would change. I came to find a large vacuum leak at the base of the carbourator, where the gasket goes. I changed the gasket and the engine runs well, what a diffferent.
I am now left with a rocker noise on load, that is when I give it gas. Is this good or do I need to further adjust my rockers. The sound is not loud but I some what feel to it should not be there.

Re: Help with Final adjustments
 

Is this a new or old motor? I just fired up my 454 after an extended period of sitting and it rattled for awhile until it warmed up.....now it's ok.

Re: Help with Final adjustments
 

Do you have screw in studs and is it a stock cam or larger lift? I have had larger cams actually unseat the press in studs and make adjustment impossible. You did use a zinc additive in your oil right?

Re: Help with Final adjustments
 

This engine is a 292 and I installed a new cam new lifters and new orings on the valves. I used a beak in oil to start her up.
Like I mentioned in my first post I ad a problem dialing in the rockers, but soon discovered a major vacuum leak. After fixing the leak the engine sounds and runs well. The only problem is that when I driving and it the gas it sounds like I still have to adjust the valves. I hear a little valve chatter.

Re: Help with Final adjustments
 

Lifter clatter when accelerating under load...?

Re: Help with Final adjustments
 

Could you explain this further?

Re: Help with Final adjustments
 

I thinking you have some preiginition going on, timing is advanced to much, this will happen especially when driving up a hill in say third and not down shifting, check your timming and vaccum advance.

Re: Help with Final adjustments
 

I will check these items this week. Thank you

Re: Help with Final adjustments
 

timing and todays poor grade of fuel will give you a clatter under a load. Set the timing and try a higher octane fuel or some fuel additive. How old is your fuel in the tank? if it has been sitting a few months while your engine build was going on it could have starting loosing its kick. Todays fuels aren't meant to be stored for very long.

We live in a fast paced world now where Autos get driven more in a day than they would in a week when our trucks were new. They don't plan on fuel sitting in tanks, plus all the good stuff is bad for the enviroment .... no more lead = no more valves