[Shotimes] motor sitting/weak valves

[Donald Mallinson]

Don,

I addressed this issue with the tech guru at Road and Track.

He finally agreed with me that a spring sitting still, even 
fully compressed, gets ZERO Fatigue stress!

Only movement wears out springs, and they don't really take 
a set from being compressed.  It is the repeated motion that 
breaks down the springs eventually.

Unless you are going for a super high reving ultimate motor 
would I worry about the springs, and in that case, you don't 
want ANY used parts, even slightly old!

Don Mallinson


Donelson Don wrote:
> I am doing a 3.2 conversion for a customer and found a 70k 3.2 motor from a reliable salvage yard.
> 
> This motor has been sitting for about 3 years and my expierence with motors like this is that the valve spring that is fully compressed can get fatigued and weak .. creating a light intermintient tap.
> 
> My question is does anyone have any ideal the max time frame that a motor could sit ( +/- ) before this event would happen ???
> 
> I always prefer to buy a motor that has been recently running but cant find any low milage 3.2's but this one.
> 
> dond
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