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General Category => General Discussion => Topic started by: Capt.Lloyd on December 07, 2015, 10:30:57 PM

Title: Impact damage on piston skirt
Post by: Capt.Lloyd on December 07, 2015, 10:30:57 PM

Hello everyone, Capt.LLoyd from Victoria B.C. here.  I'm the happy owner of a 72' Eldo currently being dismantled on the way to restoration.  My curiousity is this:  studying the right hand side piston the other night I see an impact ding along with a small and short crack on the upper skirt bottom.  Is this something that anyone has seen before?  I hesitate to guess what might have caused it...any ideas?  Also, would the concensus be that the piston is junk?  The 'ding' is from the outside surface facing inward, the wear pattern on the surrounding skirt shows no high spots.  Dimension of ding: perhaps 1/4" in length,  1/16" depth.  It's running vertically from the skirt bottom towards the crown.  I'm looking forward to your thoughts everybody, thanks.  I'll post some snaps tomorrow...

Cheers, Capt.LLoyd AKA Paul Jones

Title: Re: Impact damage on piston skirt
Post by: Kiwi_Roy on December 07, 2015, 11:20:13 PM

You're going to install Giladoni kits, right?

So those old pistons are history.

Title: Re: Impact damage on piston skirt
Post by: Wayne Orwig on December 07, 2015, 11:38:47 PM

Quote from: Capt.Lloyd on December 07, 2015, 10:30:57 PM

and short crack
.....
would the concensus be that the piston is junk?

Crack, yes, junk.

Well, there is JB Weld.....  :boozing:

Pretty odd.

Title: Re: Impact damage on piston skirt
Post by: John A on December 08, 2015, 07:03:53 AM

I've seen this type of damage come from an engine being turned  with the jug off and the piston unsupported catches on the block . Means the piston has reached the end of its service life.    :sad:

Title: Re: Impact damage on piston skirt
Post by: yogidozer on December 08, 2015, 07:11:29 AM

possibly dropped by PO when dismantled on another tear down?

Title: Re: Impact damage on piston skirt
Post by: George_S on December 08, 2015, 09:01:32 AM

If I'm understanding correctly what's being described, I think I saw this once caused by a ring failure. Is there a chip in one of the rings?

Title: Re: Impact damage on piston skirt
Post by: Capt.Lloyd on December 08, 2015, 10:05:16 AM

I think it's time to price out new cylinders and pistons...unless someone here has a functional set sitting on a shelf

Thanks for the feedback,

Paul

Title: Re: Impact damage on piston skirt
Post by: Antietam Classic Cycle on December 08, 2015, 10:10:27 AM

Quote from: Capt.Lloyd on December 08, 2015, 10:05:16 AM

I think it's time to price out new cylinders and pistons...unless someone here has a functional set sitting on a shelf

Thanks for the feedback,

Paul

If you have the original cylinders with chrome plated bores, then it is definitely time to source replacement cylinder kits.

Title: Re: Impact damage on piston skirt
Post by: Vasco DG on December 08, 2015, 10:24:48 AM

There is no such thing as a 'Functional Set' of forty plus year old chrome plated bores. Their failure is not a case of *If*, it's a case of *When* and the *When* is generally sooner rather than later.

Pete

Title: Re: Impact damage on piston skirt
Post by: NCAmother on December 08, 2015, 10:38:39 AM

does the crack end at the piston pin area?