<VV> engine clack

[Jack Kean]

You should simply stop everything before you do any
additional damage to the engine. You may or may not
have seen some VV threads relating to camshaft lobe
"failures". Failures in this area can be (but are not
100%) related to the fact that the lifter might not be
rotating properly. Left unchecked, this lack of
rotation will simply flat spot the lifter, and destroy
the lobe.

Drain the oil. How much metal is in it? If you are
wearing these parts out, the metal will be evident.
Then pull the valve train apart, down to the push rod
tubes. Inspect all of the parts. You can even look at
the cam lobes. If it's this problem, it will be
appearant, and if you are lucky, you will catch it
before you have to split the cases. If not, you will
get some peace of mind, at the cost of a day, a set of
vitons and a couple of valve cover gaskets. 

just a thought. Please do not ask how I know this. 

jk

--- J R Read_HML <hmlinc at sbcglobal.net> wrote:

> 1.  What kind of pistons and how much clearance did
> you give.  Could be 
> piston slap.  If so, should quiet down a bit after
> things warm up.
> 
> 2.  Do you KNOW that all the push rods are correctly
> installed?
> 
> 3.  If it IS something caught in a lifter, try
> changing the oil.  You might 
> get lucky.
> 
> Attachments (if any) are scanned with anti-virus
> software.
> 
> Later, JR
> 
> ----- Original Message ----- 
> From: "kovacsmj" <kovacsmj at sbcglobal.net>
> To: <virtualvairs at corvair.org>
> Sent: Wednesday, September 07, 2005 4:22 PM
> Subject: <VV> engine clack
> 
> 
> > I have a metallic clacking in my brand new engine.
> I think it is a
> > lifter. All the lifters were new, as well as the
> valves, cam, springs,
> > guides, seats, rockers, keepers, pistons, rings
> etc.
> >
> >
> >
> > I am looking for the most foolproof way to
> determine which lifter it
> > may be. No amount of valve adjustment seems to
> quiet the engine. It
> > seems to be on the left side. I know I can replace
> them one at a time
> > and do it that way, but I want to cut down the
> odds (not to mention the
> > aggravation). There is only a few hundred miles on
> the engine and there
> > was no clacking when it first started up. I'm
> assuming a stray piece of
> > dirt has messed with a lifter.
> >
> >
> >
> > I have used several stethoscopes without being
> able to locate the
> > problem. Would it help to disconnect the fan to
> cut down on the fan
> > noise and then use the stethoscope? It won't
> overheat at idle in a
> > couple of minuets of analysis.
> >
> >
> >
> > Getting all the information is most of the
> solution.
> >
> >
> >
> > MIKE KOVACS
> >
> >
> >
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