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SilverGhost

I have just disassembled and am in the process of cleaning years of deposits from my fuel distributor.
There is evidence of previous disassembly.
On disassembly I found that the four springs with washers each end were assembled with the conical side of the aluminium washer towards the spring thus:

However it seems from the writeup posted by 924RACR back on Fri Oct 11, 2002 that "The cone shaped surface of each piece goes toward the
diaphram ", presumably thus:

Can anyone confirm for me please which way up these washers should be.
Thanks.
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"Priscilla" 1981 924 NA RoW auto, metallic blue

bnoon · Posted: Tue Jun 21, 2011 4:52 am Post subject:

Wow, I didn't realize the NA and turbo fuel dizzies were so different. Are those the springs that go in the ports that feed to the injectors? If so, much differently shaped aluminum doo-dads in the 931.
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'80 924 Turbo - SOLD!
1986 Porsche 944 Turbo - SOLD!
Porscheless

SilverGhost · Posted: Tue Jun 21, 2011 7:30 am Post subject:

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

Good job, you get a Toofah Merit Badge. . .the success rate on these rebuilds is not very good.
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

924RACR · Posted: Tue Jun 21, 2011 9:34 pm Post subject:

Lucky you!

As for the correct orientation... that was so long ago I have no freakin' idea. Sorry. But yes, I recall doing the write-up about the 931 dizzy.
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Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

brealytrent · Joined: 28 Dec 2008 Posts: 414 Location: Goldsboro, NC

Just in case you run into problems rebuilding your distributor, you can send it to Doctor Injector to get it rebuilt. They now know how to rebuild these after my ordeal with them a couple years ago.
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1977 Porsche 924 - sold
1980 Porsche 931 - sold
1984 Porsche 928 'S2' Euro - sold
2016 Ford Fiesta ST - sold
2009 Porsche Cayman

SilverGhost · Posted: Wed Jun 22, 2011 5:35 pm Post subject:

Thanks for the Toofah Merit Badge Rasta Monsta. Where can I collect it from?

After reading many tales of woe regarding fuel distributor repair I had almost decided to send it off to a professional when I happened to mention this to a mechanic friend. He said he'd fixed one from a Volvo with no problems, and effectively shamed me into giving it a try. However, I confess I opened it up with some trepidation.

The difficulties I'd seen reported by others seemed in the main to be either leaks, or debris or stray sealant blocking the narrow slots and passages. To avoid these problems I worked on it indoors, cleaned everything scrupulously, especially the stainless steel diaphram and the surfaces it is sandwiched between, and used a thin film of grease as the sealant for the diaphram.

No doubt there was luck in the success of the overhaul, but the care described above probably helped.

So, my 924 is finally going well after being out of action since 2003. To fix the fuel system I had to:
- drain and flush the fuel tank,
- replace the in-tank fuel pump (the original had seized up),
- replace the accumulator (the original leaked),
- clean out the system pressure regular in the fuel distributor (the piston had seized in the bore, gummed up with fuel residue),
- clean out the hot start valve (again, the piston had seized in the bore, gummed up with fuel residue),
- clean the control pressure regulator (the inlet filter was completely blocked), and
- clean out the fuel distributor (the main filter was almost completely blocked)

It's great to now have it running properly. The only problem is that I like driving it so much that I don't have time to fix all the other things that still need attention.
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"Priscilla" 1981 924 NA RoW auto, metallic blue