<VV> Help with a sound

[tkalp at cox.net]

Bob it would be helpful if you could isolate the noise frequency to either crank or valve train.  Put a timing light on the suspect cylinder and if the noise is the same frequency as the flash then it is valve train.  If it is twice a rapid then it is with the crank/piston.

T. Kalp
Wichita, KS

---- Bob Gilbert 1 <bgilbert at gilberts-bc.ca> wrote: 
> Now that's one I had not thought of! Thanks!
> Bob
> 
> 
> -----Original Message-----
> From: yenko117 at yahoo.com [mailto:yenko117 at yahoo.com] 
> Sent: April 15, 2014 2:57 AM
> To: Bob Gilbert 1
> Cc: <virtualvairs at corvair.org>
> Subject: Re: <VV> Help with a sound
> 
> Wonder if a head stud turned in a little during install and now with the
> motor loosening up just a little with break-in... it's making contact.
> 
> Mike
> YS-117
> 
> Sent from my iPhone
> 
> On Apr 15, 2014, at 12:18 AM, "Bob Gilbert 1" <bgilbert at gilberts-bc.ca>
> wrote:
> 
> > Hi,
> > 
> > I have a freshly rebuilt 3.1 with 4 carbs in my UltraVan. The heads 
> > were done by Ray Sedman and he also provided most of the bits and 
> > pieces. So it's good quality work and bits and pieces!
> > 
> > I have about 500 miles on the engine and out of the blue it developed 
> > a rattling, metallic sound reminiscent of a sticky lifter but with a 
> > harsher metallic "rap", more like pieces of metal hitting each other.
> > 
> > I have adjusted the lifters, both hot and cold and the sound persists. 
> > I've tried to isolate it and it appears to be coming from cylinder 2 
> > but I'm not absolutely certain
> > 
> > I thought maybe a valve problem(lifter, seat, etc.)  but I have a 
> > uniform
> > 185 pounds compression on all cylinders and the its starts and runs 
> > well, except for this sound. Its loud enough that I really don't want 
> > to do any camping trips in case I make a bad situation worse and/or get
> stranded.
> > 
> > 
> > 
> > I seriously injured my back last year so I really don't want to pull 
> > the engine out except as an absolute last resort.
> > 
> > 
> > 
> > So I'm looking for suggestions on:
> > 
> > a) isolating the sound, which might in turn lead to a solution. I have 
> > tried the broom stick to the ear but that didn't work (probably 
> > because I'm partly
> > deaf!)
> > 
> > b) My gut still says it's a lifter problem but I need  advice on 
> > troubleshooting to specifically indicate a bad lifter or otherwise 
> > rule out a bad lifter.
> > 
> > c) any other ideas or suggestions
> > 
> > 
> > 
> > Thanks,
> > 
> > Bob Gilbert
> > 
> > UV 404
> > 
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