<VV> Hmmm Vairy Interesting

[Smitty Smith]

I imagine that is because you weren't looking for them with a 20 power glass when you pulled them out.  I had the compression test to back up my supposition.  I was sure it wasn't a piston top because they don't let metal get past the rings.  Valve seat bangs around in there enough to make lots of crumbs.
  BTW Frank, I now have three well rebuilt head$ needing valve seats.  Got any recommendations where I could take/send them without upsetting the national economy?  I'd put new seats in myself except I fear I couldn't get them in straight.          Smitty

Frank DuVal <corvairduval at cox.net> wrote:
  Dropped intake valve seat on #6 is the first guess. And it beat itself 
back into the hole slightly, just not enough to seal. I would go with 
hole in the piston, but that usually doesn't make noise. Unless the top 
of the piston broke off....

#6 is not inconclusive, it is zero!

But I never noticed aluminum particles on a spark plug after a seat fell 
out.

BTW, were you starting to change the lifters or adjust them? I like to 
take the valve cover off cold, saves fingers, but it is nice to warm the 
engine before adjusting valves.

Awaiting the teardown autopsy.

You have my sympathy in any dose you want, you need it!!!

Frank DuVal



Smitty Smith wrote:

>Smitty says: I was going to do some lifter work on the wagon this morning and wanted to warm the oil up before I pulled a valve cover. Started the engine and it made an awful banging like as though it was a spun bearing. By the time I got to the back and got the lid open it was not making so much noise. After I listened top and bottom to determine where it was coming from it was quiet. (how many of you are already making mental bets)? Pulled the air cleaners and noted fuel spits coming from the left carb and a slight pulsing noise. (are the odds changing)? Pulled the plugs on that side and # 6 had fresh tiny aluminum particles on the # 6 ground electrode. (Made up your mind yet)? Decided to do a compression test and a leakdown. Compression on # 2 and 4 were 132. # 6 was inconclusive as there was no compression to read. (how's the betting going)? I decided not to run a leakdown test or even lower my little inspection light into the spark plug hole. Is there
> anybody that doesn't know why by now? Sympathy will be accepted in small doses.
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