Re: [AMC-list] I know why 195.6 ohv

[Matt Haas <mhaas@xxxxxxx>]

Tom,

I assume you mean "moly rings", right? Chrome rings are very old school 
race only parts that were meant to reduce friction. Due to how hard they 
are, they end up not sealing well and you end up with a motor that uses 
a lot of oil.

As far as the rings go, are those some old rings that were sitting on a 
shelf or something more recent? The reason I ask is that ring technology 
has improved a lot recently (past 10 or so years) and long break in 
periods aren't needed any more. With modern ring technology and proper 
honing, the rings will seat within the first 15-20 minutes of 
operations. When the 199 was rebuilt in my wagon a couple of years ago, 
I used dino oil for the cam break in and switched immediately to a full 
synthetic with no problems at all. It's of course best to follow the 
recommendations the ring manufacturer provides for break in but it may 
not be the long process it used to be. That said, it is still wise to 
take it easy on the motor for the first few hundred miles to give 
everything else a chance to seat properly.

Matt

On 2/5/2010 9:45 PM, tom jennings spouted this sage advice:
<snip>
> * My "original" block, the rebuilt thing that was in the car, the bores are
> completely perfect, round, and the hone pattern is fine. A quick hone
> cleaned it up and I can use the .040 over pistons from the "blue" motor with
> new rings. Going chrome moly, and I'll just be patient in breakin.
</snip>

--
mhaas@xxxxxxx
Cincinnati, OH
http://www.mattsoldcars.com
1967 Rambler American wagon
1968 Rambler American sedan
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