[T3] '68-9 FI VW Type 3s!
topnotch at nycap.rr.com
Fri Sep 16 18:41:57 PDT 2016
This kind of mod is critical for making/keeping these cars reliable,
having those grounds hanging out there in the wash from the rear wheel wells
and thermocycled so much was asking for trouble. Good sealed connections
that are routed to the top of the case as Jim does is highly recommended.
Id put a little grease on any of the exposed connections too.
topnotch at nycap.rr.com
71 Squareback "Hothe"
65 Notchback "El Baja Rojo"
93 RX7 "Redstur"
87 Golf "Winterat"
From: type3-vwtype3.org [mailto:type3-vwtype3.org-bounces at lists.vwtype3.org]
On Behalf Of Jim Adney
Sent: Thursday, September 15, 2016 10:45 PM
To: type3 at vwtype3.org
Subject: [T3] '68-9 FI VW Type 3s!
If you have a '68 or '69 Type 3 that is still FI, you really should
My '69 square had been in storage for 14 years when I decided to get
it out and get it ready for the ~5000 mile round trip to last June's
Invasion in Prescott, AZ. A lot of things went really well in that
process, but a few things didn't. Among the few things that didn't
were a couple of things I learned about those first years of FI
production that I had not previously known. If you have one of these
cars, you should take advantage of what I learned and fix these
problems before they cause you the same problems they caused me.
Or, perhaps they are already causing you problems, and you haven't
figured out the cause yet
The biggest problem is the fact that the ground for the fuel pump
current (not the fuel pump relay current or ground) goes thru a long
daisy chain of connections all the way from the left side of the dash
to the right. It's a long torturous path that should ground lots of
places along the way, but time, shrinking plastic, and corrosion make
a successful ground less and less likely.
I now have a kit to fix this problem. It's less than $10 and comes in
2 versions because VW changed the structure under the dash (who
knew?) in early '69 (~after VIN 3x9 112 000.) Every '68 & should
install this fix.
Back at the engine, the grounds for the injectors are attached to
screws that go into the head. Heat cycling loosens those screws and
causes loss of the ground connection on one side of the engine or the
other (or both.) I sell conical spring washers (Belleville washers)
to add a spring to this connection, so it can give and take with the
temperature cycling, but on the way to AZ I discovered that these
only work if the ground lug under the screw is large enough that the
full 14 mm OD of the Belleville washer rests on the ground lug. If
your ground lugs have a base that's pretty much square, a pair of
these Belleville washers is cheap, $1/pr.
If you have one or more of the ground lugs that have a more
rectangular base, where the Belleville washers will hang over the
edge on 2 sides, I can make extension wire harnesses for $8 that will
bring those grounds back to the center of the case, like VW did
starting in '70, to avoid the excessive heat cycling.
The extension harness wires come with piggyback connectors, so you
can use along them with the Belleville washers for a neater, belt and
suspenders approach, all for less than $10.
Shipping is extra, but if you have one of these cars, you can buy all
of these and get it to your door for under $25. That's trivial,
compared to getting stranded like happened to me a couple times last
Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
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