<VV> 140 overhauls

[Harry Yarnell]

I agree. Engine knock breaks stock pistons.

harry yarnell
perryman garage and orphanage
hyarnell1 at earthlink.net
----- Original Message ----- 
From: "Roger Gault" <r.gault at sbcglobal.net>
To: "Corvair List" <virtualvairs at corvair.org>
Sent: Monday, May 14, 2007 4:21 PM
Subject: Re: <VV> 140 overhauls


> Chuck,
> I think running around in hot Texas summers with a little bit of pinging
> breaks the stock pistons whether they have new rings or not.  All the ones
> I've broken have been with "old" rings.  At least "I" had not changed the
> rings.  They were also all after a relatively long stretch of highway 
> (read
> that 80mph) driving.  Of course, being a responsible, law abiding adult, I
> no longer drive at such speeds.
>
> Roger
>
>
> ----- Original Message ----- 
> From: "BBRT" <chsadek at comcast.net>
> To: "Corvair List" <virtualvairs at corvair.org>
> Sent: Monday, May 14, 2007 3:04 PM
> Subject: Re: <VV> 140 overhauls
>
>
>> I am tending to think the stock old, used pistons break when new rings 
>> are
>> put on them. Seems as if, using the old pistons and old rings in the same
>> cylinders-assuming they are suitable for use - doesn't carry the same
> threat
>> of breaking them. Breakage seems to happen when "the old established
> order"
>> is changed... LOL!
>>
>> What do y'all think?
>>
>> Chuck S
>> BBRT
>> ----- Original Message ----- 
>> From: "Roger Gault" <r.gault at sbcglobal.net>
>> :
>>
>> > Assuming that you are into religious preventative maintenance, I'd
> replace
>> > the pistons.  My 140 experience is that the stock piston *will*
> eventually
>> > break at the oil-ring groove and the intake seats *might* come out.
>> >
>> > Roger
>> > From: <Pitts10ch at aol.com>
>>
>> >> Hi guys,
>> >>
>> >> I am just wondering about simply pulling the heads and having the 
>> >> valve
>> >> seats done, at this time it seems like it would be a good idea to do
> the
>> > jugs  and
>> >> put in new forged pistons or some updated, better pistons, then put 
>> >> the
>> >> whole thing back together again.  Are there significant issues to be
>> >> addressed in
>> > the bottom
>> >> end on a car with 33,000 miles on it (no auto cross).   Thanks.
>>
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