Rocker Clearance.

Hello,

Anyone out there know what the clearance should be between the rocker adjuster and the pushrods / valve guides?

i have been getting some mechanical noise similar to the previous post ("horrible noise").

Not quite that bad but it is coming from the head. When i pulled the rocker covers i noticed the space between the valves was different on each side as well as the height of each was different.

thanks,

You must rotate the engine to the proper crank position before checking the clearance.

Of course, the rockers will be at different heights aas they actuate, but clearance is checked after they clear the highest point at the tip, and then the cam lobe clears the pushrod lifter.

The clearances are specified in the shop manual, according to model; it is in a few thousandths of an inch, barely perceptible. If you have clearances where you can obviously wiggle the rocker arm to produce a tap at the valve stem, that's too much.

Grandpaul,

i made the adjustment to the book. .008 exhaust and .006 inlet.

I can still produce at tapping sound when i wiggle the rocker arm?

Should i go continue to lower and could this be what is causes the loud tapping sound in the head?

thanks again,

This kind of thing is nearly impossible to diagnose over the internet, even a sound clip is nearly useless.

If you set the clearances properly (sounds like you did), then it is either just normal tappet sounds, or you have an issue that needs to be examined in person.

Sorry I can't help any more than that.

Hello!

I would say that normal clearances allow a"tapping" sound.To small clearance , no tapping = bad thing..!
Check if the position of the valvestems differ much.If one is much closer to the rocker, there is a risk you´re having a faulty valve.
My motor dropped a ex.valve into the cylinder at 60mph,the rattle produced was not nice .The repair involved welding and reshaping the combustionchamber.The main rason in my case, was a worn valveguide making the valve suffer!

Benton