Re: Piston direction 39 Packard 6?

Posted by PackardV8 On 2016/7/31 11:26:45

As a side note:
It is better to have pistons with NO slot and just set them up with maybe .001 to .002" MORE cylinder wall clearence than specification dictates. This is especialy true on engines that are high demand service level engines.

For trailor queens or low speed engines then the slotted pistons are just fine and will probbably make for a more quiet running engine.


Alwaays inspect any USED slotted pistons for cracks at the slot. The cracks usualy run from bottom of slot to bottom of piston skirt.