<VV> Rebuild II

[Stephen Upham]

I just realized that Bob's reply was posted to me AND the vv.  I 
inadvertently sent my reply (with some additions), as follows, solely 
to Bob.  Now corrected.

Clark's premium cast pistons.  This from the jugs and pistons set 
ordered for the first rebuild.  Old jugs were scored and (will be soon 
I hope as I have been riding around with them in the trunk trying to 
find time to do it for the last week) sent back for core value, rings 
gone to ring heaven.  New chrome rings and 320 finish jugs from Lon.  
I'm just checking to see if the Clark's pistons will work in the new 
jugs from Lon.  Yes, I'm using a .002 metal gauge (second one 
purchased!).  The gauge was inserted 2 1/2 in. at a 90 degree angle to 
the jug wall on either side of the piston skirt.  Would not insert at 
the apex of the skirt.   When you say "opposite the pin" that is on the 
cylinder at the skirts? (said "between" [skirts] in error before)  Yes, 
the pistons are inserted in the jugs during measuring.   I inserted the 
gauge after the pistons had been inserted and not as one action. 
Haven't tried to move the pistons while the gauge is inserted.  If the 
clearance is off, ie. too tight, what should I see, the gauge being 
expelled; inability to freely move the piston?

Hope I thought of everything one needs to know in order to render a 
knowledgeable opinion.  If not ... there is always the next post, eh?

Thanks,
Stephen
On Monday, September 5, 2005, at 05:46  PM, BobHelt at aol.com wrote:

> In a message dated 9/5/05 3:30:26 PM US Mountain Standard Time, 
> contactsmu at sbcglobal.net writes:
>
> I was able to get the
> .002 gauge to go in on each of the cylinders, but only on either side
> of the apex of the skirt.  It was also tight as so as to require a back
> and forth motion and it seemed as though, when the gauge would not go
> it, that coxing it back and forth and side to side (pendulum manner)
> allowed the gauge to insert.  Once in, it moved more freely.  
> Thoughts.  Do I have .002 clearance or am I fooling myself?
>
> Stephen Upham
>
>
> Start with the basics first....
>
> What kind of pistons are you using?
>
> Are you relying on the machinist/shop to set the clearances and you 
> are just checking? What clearance did the shop set? 0.002?
>
> Are you using a metal 0.002 gauge? How long is the gauge? Maybe a 1/2" 
> wide long paper strip 0.002 thick would work better!!!!!
>
> Have you tried inserting the gauge (90 deg opposite the pin) along 
> with and at the same time as the piston? Then try moving the piston up 
> and down. What are your results?
>
> Regards,
> Bob Helt
>