GerritD

Hi ,

does anybody know how I can find pistons for my 1981 engine (engine nr 8215357)
I have 2 broken pistons (Mahle 97L20 C031 diameter = 97mm)
I tried several pistons from likely engines (4.7l ) from other years but no luck, they are all too large to fit , often 97,5 mm


Is there a way to see if a donor engine based on engine nr has the correct size of pistons?

The only thing I know is the type of engine should always be M28.11 or M28.12

Here is a pic of the correct piston:

GlenL

Try 928 International. Do you know the tolerance groups? The codes (0,1,2) are stamped on the pistons and above the cylinders on the blocks.

GerritD

it is 0 tolerance group. so no oversize but original measurements without overhauling

mark kibort

I think I have 6 of them.
from a 82 euro 4.7.... I think they are original tolerance too.

RennPartsDirect

Mark-
Would those fit in an '83 Euro engine? If so I would like to purchase one from you please...

SS

mark kibort

just one? sorry , they are sold in pairs....
Kidding..... let me check where they are. i do remember that they were the 0 tolerance group, so they should work.... ill have to dig them up. either they are at my house or scots.
what do we think they are worth?

RennPartsDirect

Most of the 928 pistons are selling for $50 each on eBay. I am just trying to help out a fellow Rennlister that I sold my '83 Euro engine to. I bought the car nonrunning because the fuel system was removed for repairs but I was told that the engine would start with starter fluid so I had no idea that the piston was damaged- I have too much trust in others I guess. Just trying to make things as right as can...

Thanks for the response.
SS

GregBBRD

Why not buy one of the ones on ebay?

RennPartsDirect

Because they all are for the 5 liter engines. I didn't see any for the 4.7. I don't do engines so I really have no clue. Just trying to find the right one for Hoi...

mark kibort

let me count the ways!


anyway, yes, all the euros use the same piston from 80 to 83. (almost sure)
but the pistons we have are 0 tollerance , 97mm.

again, i have to dig them out, but will look today

hp18racer

If Mark strikes out,

I think what you are looking for is: 928 103 086 00 (Piston Mahle 97.00mm tolerance group 0)

http://www.porsche.com/all/media/pdf...82_KATALOG.pdf

http://www.autoatlanta.com/Porsche-P...810308600.html

RennPartsDirect

Thanks! $500 is a bit steep for one piston. I sold him the entire engine with the bell housing and complete clutch assembly for only $1200 since I knew it needed work... I'm a stand up guy to a point : )

GlenL

What's wrong with the pistons that you have? Do I see a broken land in the picture?

James Bailey

The intake, heads and camshafts were worth way more than the $1,200 plus he got a clutch too !! no one got hurt on the deal.

mark kibort

that a great deal. I was TOTALLY happy for damaged 80 euro heads, good euro 80 cams from that same engine, and the entire intake from the 84 euro for 2k

that buy changed my racing life!! you get an engine on top of that, good for you! (even if its busted! )