<VV> Noisy lifters

MarK Durham 62vair at gmail.com
Wed Jun 25 11:53:25 EDT 2014

What oil are you using, and was there a good oil flow out to the rockers
when you adjusted them. If the pattern is otherwise normal on the half moon
one the half moon is probably a scratch during break in.
Put Castrol 20w50 in it with an zddp additive and see what happens. My pt
cruiser has always run a bit odd on 10w30 synthetics, got tired of it and
went  to the castrol dino oil above and the engine smoothed out and gets
better mileage, on that heavy oil. Go figure.

Mark Durham Hauser Idaho
62 2Door Coupe 4speed Red/Red
On Jun 25, 2014 8:12 AM, "James Cuneo" <jamescuneo at hotmail.com> wrote:

> Hi Mark,
>  The #1 exhaust lifter shows signs of asymetrical wear on the base. It
> looks like a thin crescent moon ( not rotating?) Oddly, it is not tapping,
> but several others are. The others show no abnormal wear on bases. Normal
> wear patterns on pushrods. When adjusting valves while running the tapping
> goes away but returns after a few seconds.
> I bought the deep dimple lifters from Dave at The Source back in 2007.
> They have about 13k on them.
> I wonder if the high performance valve springs have to high of a rate for
> these lifters causing them to leak down to much while running. The engine
> runs great but the constant tapping is annoying.
> Jim
> ------------------------------
> Date: Tue, 24 Jun 2014 19:04:12 -0700
> Subject: Re: <VV> Noisy lifters
> From: 62vair at gmail.com
> To: jamescuneo at hotmail.com
> CC: virtualvairs at corvair.org
> Jim, I have a Isky 270 cam with Elgin lifters and roller rockers. My
> lifters stay quiet at 1/8 turn but the roller rockers sound like a sewing
> machine.
> If you have tried all of that you have either bad lifters or it is
> possible the Cam was cut wrong providing a ramp the lifters have to run
> over making the noise. Have you looked for a pattern on the lifter faces?.
> Mark Durham Hauser Idaho
> 62 2Door Coupe 4speed Red/Red
> On Jun 24, 2014 10:34 AM, "James Cuneo via VirtualVairs" <
> virtualvairs at corvair.org> wrote:
> Hello, You may recall the saga of mine regarding the cracking pistons in
> my 140/turbo.It's back on the road again with new forged pistons, rebuilt
> heads and clarks roller rockers.The bottom end has about 13k miles on it
> since rebuilt in 07 with"deep dimple" lifters, otto tb20 270 cam, american
> pi adjustable cam gear. Custom length pushrods.Trouble is, I cannot get the
> "deep dimple" lifters adjusted so that they are quiet. Sounds like an older
> 911, tappity tappity.This has been a problem since 07.I have good oil
> pressure, 30 psi at idle. 40 at 3k. Verified with multiple gauges.I have
> tried tried comp cams roller tip rockers as well as stock rockers to no
> avail. I have followed every method of recommended of adjustment. Static,
> running, 1/4 turn, 1/2, 1turn, shop manual etc.I suspect the lifters just
> leak down to much while running so that there is always lash.Any advice
> before I replace all lifters with new?If I do, sealed power? others?Thank
> you, Jim Cuneo65 corsa 140/turbono
>  rcal
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