<VV> Help with a sound

[yenko117 at yahoo.com]

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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