Earlier this year I took the Weber 32/34 DTF4 A carb apart.At that point I did not have an ultrasonic cleaner and someone I know offered to clean it. It came back clean – but after a couple of days the surface
started to change. Though I am still unsure I believe it is some form of
oxidation which I guess is caused by the degreaser used. But this was even the
worst part. While trying to remove the throttle plate screws, I destroyed the
head of one. Not having much experience in carburetor rebuilds I reached
out to IOZ Vergasertechnik for help. They are clearly an instance for Weber carbs,
and I was extremely happy to hear that I could bring them my Weber 32/34. One
of the guys there looked at it and told me that it looks very bad. Drilling out
the screw would only work 1 out of 10 times. But luckily the throttle shaft is available,
and I shouldn’t worry – they would sort it out….However, the costs for the repair combined with the
uncertainty on when they would finish the works let to a rethink. A possible replacement
for the 32/34 DFT is the 32/34 DMTL. It means sacrificing the auto choke (which
I already bought a spare part) and is available at BurtonPower for half of the cost of a repair. If everything
else fails – this will be what I will order. But before I will try to fix and
overhaul the carb myself.Step 1 was to drill out the broken screw. For this I
ordered a cheap screw extractor set from Amazon that includes a M3 drill and an
extractor. Now either I am extremely lucky, a natural talent or the guys from
IOZ just completely overexaggerated the problem. Getting the screw out was
easy-peasy. Using a 2mm drill (then stepping up to 3mm and 4mm) on the slowest
possible setting on my battery powered drilled a center hole. Then you slowly
drive in the extractor counterclockwise. The head of the screw broke of with
the 4mm extractor but did not cause any damage on the shaft. After about 10
minutes careful work the 3mm bit and extractor the rest of the screw came out. Today I used SK Sonic carb cleaner and gave the completely
stripped carb body a 30min at 80 degrees Celsius bath in the Ultrasonic. Afterwards
I rinsed it thoroughly with clean water and dried it with compressed air. There
is still some oxidation on the body – but it looks much better already. New throttle
screws and telfon bushes have been ordered from Webcon. Combined with rebuild
kit from Burtonpower and the new auto-choke I have now spent almost 200€ on the
carburetor. Fingers crossed that it will work just fine but I the new wiring
loom needs to be installed before the car will be fired up for the first time
again.
Fixing C6622 
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