[T3] Brake Lights
jadney at vwtype3.org
Sun Jul 3 09:50:04 PDT 2011
On 2 Jul 2011 at 17:59, Bryon Garvin wrote:
> It was sunny today and I just had to follow my hunch and change out the
> brake switches. I was right. Both switches failed. They were Euromax and
> lasted WAY less than a year....and even less than that when you consider
> that I probably only used the car as a daily driver for 4 months of that
It's possible that regular use will keep the contacts clean. I really
don't know. I wish I had a known good solution for this. The brands I
happen to have on hand are Euromax and Meyle. I had hoped the Euromax
would be good, since they actually have the Audi logo on them, molded
into the plastic cap.
Other than the logo and the stampings on the side, both of mine look
exactly like yours, except that mine came with thread sealing
compound on the threads.
> So, got under the car...had new switch in hand and unscrewed the old one.
> Quickly swapped with minimal leakage and proceeded to tighten. At the end
> of the range that it would tighten up, I gave one more final "snugness" pull
> and the damn switch broke off at the threads and I was left staring at my MC
> with threads buried inside. The neighborhood heard a subsequent
Ouch! That's a real bummer. I once did the same thing on a $3 million
particle accelerator, so I know how it feels. In that case, I could
see that the body of the switch had been bored out so that there was
barely 1 mm of metal under the root of the threads at the point where
it broke. There was no reason for that, but we changed to a 1/4" npt
> 1) beware that even parts stores know Euromax is crap and so don't buy
> those! And if you do get these "german" switches, don't tighten them TOO
> much. Previously, I really did reef on my switches to make them good and
> sealed. Never had a problem...but today, I learned that was probably too
> much. Maybe I just got lucky before and these "German" switches are fine.
> I'm not complaining about their construction. I just think I tightened too
It may be the construction. The center hole should be small ALL the
way thru the small dia part of the switch.
I don't generally trust most FLAPS to know the quality of what they
> 2) Between having this system apart last summer and then again just now, I
> have a significant amount of DOT 5 brake fluid that I've recaptured from 2
> drainings. I want to reuse it and Jim, I know you filtered yours before. I
> forget what you said about when you reuse fluid and when you don't.
I always reuse it.
Mix with water, shake up, and let settle a few days, then filter,
pouring off the top DoT-5 and leaving the water, etc, behind.
Let settle a few more days and filter again.
Any residual Dot 4 or 3 will dissolve in, and be separated with, the
If you're not sure if you got all the water out, heat it to about 250
F to drive the last bit of moisture out.
I use large coffee filters, a large plastic funnel, and 2 L
laboratory flasks to do this process.
Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
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