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dgKnecht · Joined: 17 Nov 2002 Posts: 42 Location: Palatka, FL

anyone have any part numbers needed to replace the o-rings and gaskets in the fuel distributor? i'm gonna attempt this weekend....wish me luck lol
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78 924

--all of us have been through some bad times.....i once had a job where i had to drive a Chevette

Tigger937 · Posted: Thu Oct 25, 2007 2:01 pm Post subject:

You are going were few have gone before. BOL.
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1981 931 (Concours)
1982 931 (Daily Driver)

"Think outside the box"

931Tony · Joined: 15 Jan 2007 Posts: 40 Location: Lawrence, KS

dgKnecht
I actually did this not too long ago. I'll look it up tomorrow when I go by the shop. I ended up buying a metric (neoprene, not rubber) o-ring kit instead of just buying one at a time but I'll post with the part numbers tomorrow.
Good luck!
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1981 931 For Sale... Sad to see her go.

dgKnecht · Joined: 17 Nov 2002 Posts: 42 Location: Palatka, FL

i can find the o-ring between the dizzy and the air metering assembly,
and i can find the cork gasket between the air metering assy and the air filter box, ( both shown in PET).
but i can't find that o-ring for the pressure regulator needle

hopefully that is all i'll need?
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78 924

--all of us have been through some bad times.....i once had a job where i had to drive a Chevette

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

SpecialT Auto has that one.
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

RC · Joined: 25 Mar 2007 Posts: 2637 Location: Australia

You wont get a list of sizes from Porsche since this whole part is intended to be replaced not rebuilt.

It can however be successfully rebuilt and all the O rings are METRIC SIZES. These are available sizes, although not all common, and may only be available at a specialist seal supplier, particularly in the USA. Measure all the existing seals with calipers and fit in with standard sizes, IIRC all single mm diameters (to 20 at least) with thicknesses of 1, 1.2,1.6,2.0,2.5,3 etc.

Some in my spares collection suggest possibly 18x1.6 and 16x1.6 on piston tube OD and 7x2 on the 4 elongated radial sleeves on the tube to upper body. This must be aligned correctly, pushed in hard while lubricated with fuel and not twisted when tightening the main nut.

Have fun.

Roger

dgKnecht · Joined: 17 Nov 2002 Posts: 42 Location: Palatka, FL

is that the way the alum washers go - or are they upside down?
check out all the rust, ewwwwww

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78 924

--all of us have been through some bad times.....i once had a job where i had to drive a Chevette

RC · Joined: 25 Mar 2007 Posts: 2637 Location: Australia

The aluminium washers are the correct way.

That rust is a worry though. Suggest scraping off the majority (in the hollows only not the bore or face) and then treating with a chemical rust dissolver or convertor. Glass beading would be the best option IMO as it will remove the rust but not damage the machined faces.

Roger