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<x-flowed>Is the VR in a different place in the Type 3 than the Type 34?
Maybe I should look again. . .
On 18 Jul 2005 at 10:41, Matthew Jones wrote:
I just spotted a potentially serious detail on the new Bosch voltage regulator:
The whole outer metal shell is D+. This means that when the engine is running, it is at 12 to 14v.
This sounds like a serious flaw. Was there any warning with the VR, or was this
something that you had to discover for yourself?
This picture shows the old & new side by side: http://vw1600e.org.uk/regulator/reg1.jpg
This picture shows a side view: http://vw1600e.org.uk/regulator/reg3.jpg
I can't quite tell from the photos, but is it clear that the D+ terminal is NOT
insulated from the upper case? I can see that the other 2 terminals DO appear
to be insulated. Is there a ground connection point that is separate from the
I think an appropriate safety device may be an old margarine tub over the whole thing.
I replaced the vinyl "insulation" next to my VR with duct tape covered in PVC insulating tape. PVC tape on its own isn't sticky enough, and gets saggy when hot.
There's a good reason for this design, I think. You can see 3 electronic components pressed into the shell. By doing this they get a nice big heat sink area.
The heat sink is a good reason, but I don't understand why the new VR had to be
larger than the old one. It should have taken up quite a bit less room.
Unless there's something wrong with the one you got, I'd say that this is a
serious design flaw. Most people would not have noticed this, and this would be
likely to lead to damage to the generator or VR. That would have PO'd a LOT of
Can anyone else out there confirm Matt's observations?
-- Jim Adney email@example.com Madison, WI 53711-3054 USA
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