[Chevelle-list] 327 question

[J. Brady]

Thanks for the input Herb-  I'm pretty sure it's
engine-related, as I've put the car back together from
scratch as you know, and I'd hoped to eliminate any of
that hubub to avoid making you guys compensate for it 
 8^]

As for the tranny, plain ole PG 2 speed automatic.  

It's the weirdest thing.





--- Herb Lumpp <blamacamvet at gmail.com> wrote:

> Hi Jim,
> 
> Let me start off by saying, you do have valve
> guides, maybe you meant to say
> you didn't have them replaced when the work was done
> on the heads?  Either
> way, you have them.  As for the noise, are you sure
> it's coming from the
> engine?  Do you have a manual or auto trans?  It
> could be something in the
> clutch and/or linkage that doesn't like that
> particular rpm and it rattles.
> Maybe something under the body/frame is very close
> to the engine/trans and
> at that rpm things move just enough to make contact.
>  Food for thought.
> 
> Herb
> 
> -----Original Message-----
> From: chevelle-list-bounces at chevelles.net
> [mailto:chevelle-list-bounces at chevelles.net]On
> Behalf Of J. Brady
> Sent: Friday, November 10, 2006 6:36 PM
> To: Chevelle Group
> Subject: [Chevelle-list] 327 question
> 
> 
> Drove the '66 to work today, and decided to throw
> this
> question out to "the Council":
> 
> My car runs great, and the 327 has an aluminum
> intake,
> speed pro 10.5:1 pistons, crane powermax cam
> (272/284), Comp Cams roller rockers, and freshly
> built
> camel hump heads with pinned in studs.  Valves have
> been redone within the past 2-3 years with MAYBE
> 1000
> miles on them, and I have new valve springs and
> retainers (also Crane, to match the cam).
> 
> All that being said, it runs great with one small
> pet
> peave..  When I drive the car it runs flawlessly
> UNTIL
> I get to 2000 RPMs on the tach, at which point I
> hear
> a slight "chatter".  That's the only way I can
> describe it.  I've heard hung up lifters before, and
> that's not the noise- that's a chronic
> "tap-tap-tap-tap" (like 1-2-3-4). This, in my best
> impression, goes "dadadadadadada" in a much faster
> interval, thus the chatter description.  It sounds
> like it's on the driver side of the engine, and
> happens ONLY at 2K RPMs..  I drop back, it goes
> away-
> I increase throttle PAST 2K RPMs, it goes away.  I
> thought maybe it might be something bumping the
> dipstick or something stupid like that, so I moved
> the
> dipstick and it still happens.
> 
> I don't think it's worth pulling the engine back out
> to check, but it's damned frustrating.  Anyone have
> any guesses?  I do not have valve guides and I
> wondered if it might be that I need them.  Another
> note, I had the same noise when I had my 260/272 cam
> in it, which I just swapped out to the 272/284 as of
> this year.  I thought maybe the disassembly and
> reassembly might make it go away (with readjustment
> of
> the valves), but it's still there so I'm guessing
> it's
> lower end noise.  But from where and why ONLY at
> that
> revolution?
> 
> Thanks in advance,
> 
> Jim
> '66 Malibu
> 
> 
> 
>
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> 



 
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