[TheForge] Rivets & heat

[jerry Frost]

Yeah but it's the ALUMINUM piston that's expanding farther than the Steel
sleeved CAST IRON cylinder that causes the problems. 

The effects of temperature on a tube are a LOT different than a relatively
small hole in a wide plate.

Frosty

-----Original Message-----
From: TheForge [mailto:theforge-bounces at mailman.qth.net] On Behalf Of
Comcast
Sent: Friday, August 12, 2016 4:45 PM
To: terry l. ridder; Blacksmithing List Sponsored by ABANA
Subject: Re: [TheForge] Rivets & heat

No. The rings take up the initial gap then wear in the bore. If you run an
engine too hot it will seize. Done that on everything from yard equipment to
passenger cars and even an outboard. Slow learner I guess. 

> On Aug 12, 2016, at 5:04 PM, terry l. ridder <terrylr at blauedonau.com>
wrote:
> 
> Hello
> 
> consider an internal combustion engine.
> anywhere from 1,2, 3, 4, 6, 8 cylinders.
> those cylinders are holes
> those holes are occupied by pistons.
> those pistons are connected to connecting rods.
> which are connected to a crankshaft.
> 
> I am going to assume that everyone on the list has numerous years 
> experience with internal combustion engines. I will stick to 4-cycle 
> engines.
> 
> the engine works by controlling the combustion of a fuel and air 
> mixture. this combustion heats the engine block up above the boiling 
> point of water & antifreeze mixture. if the cylinder were to become 
> smaller the piston would seize. the piston and rings are going to 
> expand. That is the whole purpose of the rings to keep the compression 
> at operating temperature.
> 
> the cylinder diameter expands, no doubt about it.
> 
> --
> terry l. ridder ><>
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