So, - a problem with the brakes.
Looking ahead, I'll say that I created it for myself, and then I bravely fought with it! )))
After pumping, the brakes were there, but bad, "cotton" somehow. I decided to "pump" them in extreme conditions - on the go, with sharp braking. Surprisingly, it seemed to work! The brakes became better, and somewhere after 3-4 times, the wheels even started to lock. I was already happy. And then somewhere on the 5th or 6th time, the pedal suddenly failed... something must have snapped! - I thought )
And I was not mistaken - from under the left headlight a stream of brake fluid flowed... I opened the hood - it was flowing from the ABS hydraulic unit, from the outlet fitting of the rear brake circuit (h).

I drove into the garage, tried to tighten the fitting, - it didn't work. Then I remembered that during assembly, this particular fitting was screwed tightly, but then I didn't attach importance to it. Oh, in vain. I unscrewed it, it looks like everything is fine with the thread.


But I couldn't screw it in anymore - the thread in the hydraulic unit was already damaged. When assembling, I screwed it in crookedly, it held for a while, but during emergency braking it still didn't hold... We tried to thread the place with an M10x1 tap - after that the fitting was screwed in, the tube was fixed. But when I pressed the pedal, the brake fluid no longer gushed out, but simply flowed out through the damaged thread. Fiasco. I clogged the hydraulic unit. ((

I removed it, and it became clear that here it is necessary to either cut a new M12 thread, or look for another hydraulic unit.

There was also an option to install a "spring" - a Chinese repair kit for thread restoration. I almost bought it, but for some reason it did not inspire confidence in me... also in the brakes.
I also do not really like the option with cutting the thread for the M12x1/M10x1 adapter - if small metal shavings get inside, how can I clean them out later? And if they go through the tubes to the calipers?....
That's why I started looking for another hydraulic unit. On Fortunately, it turned out that they are not expensive, and there are many of them on sale, because few people need them. So, I bought an ABS hydraulic unit at a car scrapyard (at the price of a Chinese "spring"). According to the "legend" of the seller, it was brought from Poland and has been in storage for a very long time. The number is exactly the same - BOSCH 0 265 200 013.

I disassembled it a little, washed it, cleaned it, painted it.

Although the numbers are the same, the units have some insignificant differences.


Ready to install.

I installed the hydraulic unit, and here again something went wrong with the thread! Now the problem was with the outlet fitting of the front right brake circuit (r). It did not want to twist at all! Although the broken fitting twisted freely.

The thread on both fittings are normal.

I don't know what the problem was, maybe my hands are crooked... ))) But I really didn't want to screw in another hydraulic unit. Therefore, after struggling with that fitting for two days, I decided to order an adapter (or in this case, rather, a spacer) M10x1/M10x1.
And it worked! The spacer easily screwed into the hydraulic unit, and the fitting easily screwed into the spacer. I don't understand why it didn't screw in without the spacer, but we have what we have! :)

So, the hydraulic unit is installed and screwed in. By the way, before installation, I blew all the brake pipes with a compressor to completely replace the brake fluid, because it looked very dark. Therefore, the entire system needs to be pumped again. We start pumping - and trouble! The hydraulic unit does not pump. Not at all. No way. I stupidly did not blow it.
I remove the hydraulic unit again! )) I try to blow it with a compressor - it does not blow. And then I remember the words of the seller that should have alerted me - "it has been in storage for a long time". The old brake fluid in it has dried to death.
By the way, about the differences - this unit has two additional outputs (or inputs) on top, which are closed with threaded plugs. I thought they were "parallel" with the standard outputs, but they do not blow. I wonder what they are made for?


After soaking with brake fluid poured from a syringe, the rear circuit and the front left circuit began to blow. And I poured the front right circuit with brake fluid, carburetor cleaner, and solvent for several days - no result.

This is such a mess!
I've already started thinking about trying to disassemble this hydraulic unit to clean it. Although it doesn't look very easy to disassemble. I found a video on the Internet. But after watching this video, I realized that it's better for me not to do this, because I'll have to put it back together later... )) There are 100,500 small parts. You also need a specific tool.
Maybe someone will need it.
So, I'm looking for a third ABS hydraulic unit! ) But, preferably, a working one! ))
And here I got a little lucky. A teammate is building a car for sports/drift, so he completely disconnected the hydraulic unit, because he doesn't need ABS. But until recently it was working. You just need to remove it from the car. We agreed, we removed it. The hydraulic unit is exactly the same as I had before, with the same number, and without those additional fittings.
"Master ABS" )))

Everything is blown out, the brake fluid in it is fresh. Again cleaning, washing, painting.

But there is one nuance - some terrible corrosion of the aluminum body! Just to dust. I don't know what it is from. I cleaned it, and covered it with zinc. Fortunately, it is not through and through! ))


I'm installing the third ABS hydraulic unit. And you think everything went well the third time? Of course not! ))) Again the same problem with the front right circuit fitting! It doesn't turn. It's just some trash! But I already have a miraculous spacer! With it, everything turned without problems!. Such a tricky thing! ))

The brakes were bleeding for a very long time. At first, the brakes were "cottony". Then again a few passes with sharp braking, and again pumping. In the end, the brakes became better, and even ABS started working! Now I not only have it, but it also works! )) Maybe that's why the brakes still seem weak to me, because before, without ABS, it braked much more sharply! )) Or maybe I'm just used to the better brakes in the E53... I'll drive a little, and then we'll see how it brakes... ;)
That's how I've been "having fun" the last few weeks! ) Now I need to go to the rollover/rollover test stand.



























































































































































































































































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