<VV> Lifter question

[Frank DuVal]

Well, yes and no.

You should not be able to turn the nut a full turn without some change 
of running/change of noise.

Usually as you turn the nut a 1/2 turn, you need to wait for the lifter 
to change its operating range. During this period, the valve is held 
open, so  there is a miss. Once the lifter "pumps down" the miss goes away.

Now, if while turning the nut the noisy lifter does not go silent, the 
noise is not lifter clatter, but something else. I've had worn guides 
and worn rocker arms make this noise. I've heard of worn valve lifter 
bores also making noise.

Time for the rubber hose while it is running. Hold one end in your ear, 
put the other end next to all suspect areas.

This is a good time to find younger members with better hearing for us 
old guys.

Frank DuVal

On 8/12/2013 9:10 PM, Bob Gilbert wrote:
> Hi,
>
> My freshly built 3.1 runs well but has just started to develop what sounds
> like a lifter noise in the LH bank, possibly in the area of #2 cylinder
>
> It's like standard "noisy lifter" noise but with a harsher metallic sound.
>
> I have set the valves, twice cold (half turn)as per normal and just for a
> change I did a hot adjustment but the sound persists.
>
>   
>
> One of the things I noticed while doing the hot adjustment was that I was
> able to turn the rocker nut down on # 2 exhaust a full turn past the normal
> correct setting with no perceptible change in either operational engine
> sound or the "noisy lifter" noise.
>
> Not being familiar with adjusting lifters while running I was wondering - is
> being able to turn the adjuster nut a full additional turn down with no
> audible effects normal?
>
>   
>
> Thanks,
>
> Bob
>
>   
>