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Re: Need to repair one broken piston - cheaply. [Re: Fab64] #1656468
08/21/14 02:31 PM
08/21/14 02:31 PM
Joined: Jan 2005
Posts: 12,406
Kalispell Mt.
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HotRodDave Offline
I Live Here
HotRodDave  Offline
I Live Here
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Joined: Jan 2005
Posts: 12,406
Kalispell Mt.
Post your bore size and I will see if I have a spare piston.


I am not causing global warming, I am just trying to hold off a impending Ice Age!



Re: Need to repair one broken piston - cheaply. [Re: HotRodDave] #1656469
08/21/14 03:02 PM
08/21/14 03:02 PM
Joined: Oct 2004
Posts: 1,074
So Cal, USA
Fab64 Offline OP
super stock
Fab64  Offline OP
super stock

Joined: Oct 2004
Posts: 1,074
So Cal, USA
Quote:

Post your bore size and I will see if I have a spare piston.




Thanks, Dave. I have not yet ordered a new piston from Rockauto. Unfortunately, they don't have any std-sized rings for a single-piston left, just complete sets (for all eight).

I need one standard-size piston with rings for a 1966, non-HiPo 383, bore size 4.25". This motor came out of a Chrysler, and the block does not appear to have been bored over-size. If you have a spare piston with rings on it, I would happily pay the shipping.

Last edited by Fab64; 08/21/14 03:17 PM.
Re: Need to repair one broken piston - cheaply. [Re: HotRodDave] #1656470
08/21/14 07:03 PM
08/21/14 07:03 PM
Joined: Jan 2004
Posts: 8,192
fredericksburg,va
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cudaman1969 Offline
master
cudaman1969  Offline
master
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Joined: Jan 2004
Posts: 8,192
fredericksburg,va
Just a thought, maybe it swallowed something that broke those ring lands that way?

Re: Need to repair one broken piston - cheaply. [Re: Fab64] #1656471
08/21/14 10:36 PM
08/21/14 10:36 PM
Joined: Feb 2005
Posts: 4,309
Prospect, PA
BSB67 Offline
master
BSB67  Offline
master

Joined: Feb 2005
Posts: 4,309
Prospect, PA
Quote:

Quote:

Quote:

I'm guessing there may have been an intake manifold leak at the #7 cylinder, which caused that one to run way hot.




Have you tried to wrap any logic around that statement?




My bro-in-law, a retired mechanic, is the one who suggested this. He has seen instances of intake manifold leaks causing such things. A leak at the intake runner for #7, where the manifold meets the head, would allow outside air to be pulled into the cylinder, diluting the a/f mixture, thus leaning out that cylinder, and causing it to run hot. Since none of the other pistons show any obvious signs of either abuse or overheating, this sounded like a logical and reasonable explanation for what might have caused this issue. Does this not sound possible to you? He wasn't saying this is definitely the cause. If you ask five people on this board, you may get five different explanations.




And likely not that one, or at least I would hope not............ well maybe.

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