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bureau13 · Joined: 07 Sep 2017 Posts: 487 Location: South Florida

I made the mistake of disconnecting the fuel in line at the distributor banjo bolt, thinking I had the adapters to connect to a fuel pressure gauge, but I did not. Now I keep seeping fuel even though I've tried several sets of copper washers. I think that's an M12 fitting. Anyone have the specs on the required washers? Maybe mine are too thin.

It's a 1982 Turbo, although I suspect they are all the same in this area.
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1982 931
1986.5 Silver 928S
2007 Hummer H3 (Daily Driver)

Past lives (I miss them all):
2004 RX-8 (Wrecked)
1993 RX-7 (Sold)
1987 RX-7 Turbo II (Sold)
1985 RX-7 GSL (Stolen)

Raize · Joined: 18 Sep 2013 Posts: 281 Location: Scotland

I ended up using Dowty washers on mine. Must have tried to get it to seal with the copper ones at least a dozen times with no luck.

Cedric · Joined: 27 Aug 2004 Posts: 2721 Location: Sweden

I couldn't get the FD stop leaking with my generic copper washers. Bought them from Porsche and it didn't leak a drop. The dimensions and material differed a bit, obviously enough:)
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1980 924 Turbo
www.instagram.com/garagecedric/

morghen · Joined: 21 Jan 2005 Posts: 9014 Location: Romania

Yeah the copper washer used for fuel sealing have a soft outer layer that does the sealing.
You can id them by their edge bevel/radius. The regular ones have sharp edges.

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Supercharger and EFI kits
https://www.the924.com

MikeJinCO · Posted: Tue Jan 14, 2025 1:36 am Post subject:

You could try taking out the washer and then heating it very hot with a propane torch. It would take out any work hardening, ie the copper would be softer after cooling.
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Mike

'67 MG Midget Dp
'71 Ocelot Dsr Kawasaki 1000(under rebuild)

bureau13 · Joined: 07 Sep 2017 Posts: 487 Location: South Florida

Thanks for the info. I ordered a new set that claims to specifically be for this purpose, so we will see it that works.
_________________
-----------------------------------------
1982 931
1986.5 Silver 928S
2007 Hummer H3 (Daily Driver)

Past lives (I miss them all):
2004 RX-8 (Wrecked)
1993 RX-7 (Sold)
1987 RX-7 Turbo II (Sold)
1985 RX-7 GSL (Stolen)

!tom · Posted: Fri Jan 17, 2025 6:22 am Post subject:

I think it's important to quench the heated copper to anneal it so that it is soft enough to seal.

Heat washer hot with torch, then dunk in water. Should be able to re-use after that process.
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78 924 NA
5-lug

bureau13 · Joined: 07 Sep 2017 Posts: 487 Location: South Florida

For what it's worth, I just bought a new pack of washers and made sure they specifically claimed to be crush washers for sealing. I don't know if the other ones were NOT intended for that, were just crap, or I got lucky, but the new set worked perfectly first try.
_________________
-----------------------------------------
1982 931
1986.5 Silver 928S
2007 Hummer H3 (Daily Driver)

Past lives (I miss them all):
2004 RX-8 (Wrecked)
1993 RX-7 (Sold)
1987 RX-7 Turbo II (Sold)
1985 RX-7 GSL (Stolen)