<VV> Pinging

MarK Durham 62vair at gmail.com
Wed Mar 19 19:24:08 EDT 2014


Frank, Frank, got to instruct the right way! Did I use them? Should have, I
ended up adding a quart of $6.00 oil after each cylinder banks  adjustment!
But they wouldn't fit around the roller rockers. At least I cannot complain
my lifters, pushrods and roller rockers don't flow any oil! Mark Durham
Hauser Idaho
On Mar 19, 2014 3:11 PM, "corvairduval at cox.net" <corvairduval at cox.net>
wrote:

> I also echo these replys. I use the 1/2 turn from when the push rod stops
> turning with fingers to set cold adjustment. Then if it seems wrong after a
> run in, I do a hot running adjustment like Mark wrote.
>
> What's this 1/3 valve cover idea? If I did that, I wouldn't get the hot oil
> treatments for my arms! GGGGG!
>
> Frank DuVal
>
> Original email:
> -----------------
> From: Vairtec Corporation vairtec at comcast.net
> Date: Wed, 19 Mar 2014 14:04:27 -0400
> To: virtualvairs at corvair.org
> Subject: Re: <VV> Pinging
>
>
> Brian, you may recall that we could not even get the engine you built
> for my car to START until we backed off the valve adjustment, at which
> point it fired and a subsequent running adjustment worked fine.  I'm no
> engine guy by any stretch, but I strongly endorse what Mark has written
> here because running adjustments in exactly the procedure he describes
> have solved more than one "engine problem" for me over the years.  --Bob
>
>
> On 3/19/2014 12:57 PM, MarK Durham wrote:
> > Brian, all I know is that when I rebuilt my 110, the engine did not run
> > real smooth nor did it sound 100% right until I adjusted the lifters to
> no
> > more than 1/4 turn in. I had them set at 1/2 turn (cold on the bench
> > adjustment) for the first 4000 miles, and I finally did a running valve
> > adjustment to likewise find a source for some unusual noise and the fact
> > that the engine would not idle down and adjust to spec.
> >
> > I had put a Isky 270 cam in it and thought the "not want to idle down "
> > scenario was caused by the cam, but after the valve adjustment I was able
> > to set the carbs up to spec, plus the engine smoothed out and sounded
> > better, even though it lopes a little bit. Its like the engine was too
> > tight before with the lifter bodies adjusted at 1/2 turn.
> >
> > Its my understanding that new style lifters are supposedly centered at
> 1/2
> > turn in, so going one full turn may be too deep and if that is the case
> for
> > your lifter style, that might be where the noise is coming from, too. I
> > know the book says 1 full turn, but that is for parts produced back in
> the
> > 60's when the cars were new and the lifters were produced to a different
> > spec.
> >
> > So my advice is to do a running adjustment  using the 1/3 valve covers to
> > keep the oil in; first adjust out to zero lash so the tapping just goes
> > away *on all of them*, and see how it runs, then *adjust in 1/8 turn
> > on all*while running, and see how it runs, then *go
> > to 1/4 turn if you want*, and see how it runs.  There is no need to go
> any
> > further in, the lifters are in their operating range at 1/8 turn and as
> > long as everything stays properly lubricated, the system should stay
> quiet
> > for years to come.
> >
> > My "sweet Spot" was 1/8 turn in, so that is where I left them. When I
> went
> > to 1/4 turn, the engine slowed down and made some sounds I didn't like,
> > like something was binding a bit. But, it does not do this at 1/8 turn
> in.
> >
> > When you get to that point, the engine will probably be smoother and
> > quieter.  Then  you can see if that helped what you think is pinging.
> >
> > Just my thoughts.
> >   Mark Durham
> > Hauser, Idaho
> > 62 Monza coupe Red/Red 4 speed
> > modified 64 - 110
> >
> >
> > On Wed, Mar 19, 2014 at 9:10 AM, Brian <bmoneill at juno.com> wrote:
> >
> >> Is there any connection between valve settings--currently one ful turn
> >> down--and pinging?  A snewly built 140 has both an untraceable valve
> train
> >> noise and intermittent pinging.  Everything is stock to include NOS 304
> GM
> >> cam.
> >>
>
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