<VV> noisy lifters?

[James Cuneo]

--Forwarded Message Attachment--
From: patiomatt at aol.com
To: virtualvairs at corvair.org
Date: Wed, 25 Jun 2014 11:20:34 -0400
Subject: Re: <VV> Noisy Valves

 
 
 
The "deep dimple" lifters came from "The Source" in 2007. I do not know the brand. The other thing I forgot to mention was that the heads have after market high performance valve springs.I assume this means the springs have a higher rate.Could this cause the lifters to collapse a bit more than normal and not return to zero lash before the next lifting cycle? The engine runs great but the tapping is annoying.
The tapping stops when I adjust while running, but after a few seconds it returns. Unfortunately, it is several valves.
Thank you,
 Jim Cuneo
 
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 Now that sounds like worn valve guides.....and yes the performance springs are stiffer..not softer
 
 
Matt Nall
Charleston, Oregon
http://tinyurl.com/The-Corvair-Patio
 
http://tinyurl.com/Matts-Tech-Pages
 Matt, Heads were rebuilt by reputable corvair vendor, I assume this means he used good, reamed or replaced valve guides. I did remove and inspect one intake and exhaust valve to verify his claims and at least on that cylinder, the guides were good.They have 1k miles on them now.By the way, this is the second set of rebuilt heads iv'e used with same tapping noise.The common denominator is the lifters.Thanks,Jim