Finally COntinuing Engine Evaluation - Piston help
 

Hi All,

Been traveling and remodeling a bathroom so no time (and too cold in unheated garage) to continue my teardown of the motorsheister autopsy I started last fall. Finally got time to get back to it and found one of my micrometers out of calibration. Got that fixed so I can go on and measure everything and will post update in next couple of days (things are going slowly, I cut the end of my thumb off).

In investigating the pistons and cylinders further I have a question on these regarding the manufacturer marks to assist in determining if they were swapped out by those hacks.

Pistons have ID number 80P26E - searched many places and I know it was a number for 69 but I have a 68 S - was this also a 68 S number?

Cylinders are biral (80zd3) but is there a difference in manufacture that would id if they are indeed for a 68 motor?

Help is much appreciated.

Anyone??? From what I have found around the only reference to these numbers are for 69 S pistons. Is that correct?

Sorry to hear about the end of your finger!

Here is the most complete list by our friend Tom.

Piston I.D.? - Early 911S Registry Bulletin Board

That suggests that they are 69S. Do you have a photo, it's easy to confirm.

Thanks! "It's just flesh wound." haha!

I will get pics up later... I am finally continuing my autopsy of this motormeister rebuild and finding more scary stuff, but it is taking a long time to clean these parts up and measure as I have other obligations, and my thumb slows it down. Seems that chem-dip is a strong cleaner - and on a major flesh wound like mine it can cause new and "elevating" levels of pain. SO I am basically stuck doing all cleaning one-handed right now.