Hello everyone :)
This won't be very interesting for casual readers, even though there are many pictures, as almost nothing will make sense) So I suggest just watching the video on how a diesel engine works after maintenance at the end and reading the last paragraph) For those who want to repeat it, don't be afraid, it will be hard to understand at first, but when you see the engine in front of you everything will become clear. Everything is very easy.
Several people have already asked me how to connect 21R-U without EGR? After all, as everyone knows, EGR brings nothing but problems. It clogs up the intake manifold. In summer especially, power drops due to overheating of the intake manifold, which means lower air density. Eventually, a compressor on carbureted engines eats up some of the power, and its overdrive doesn't help much.
So. First, you need to cut out the catalytic converter (in case anyone still has it). Let the engine breathe freely. Second, remove the EGR compressor. It's next to the air conditioning compressor. Third, remove all this crap
And fourthly, connect vacuum hoses properly so there is no air intake in the inlet.
Below is a diagram of the factory vacuum system connection, for which I am very grateful aconis
Here's how everything should be connected after removing unnecessary parts
On the canister everything remains as it was, only two tubes where exhaust boost was attached need to be plugged. You can weld them or you can pull a compressed hose like me. Looks not great but simple and easy to fix)
The hoses on the canister should go as shown in the photo, one end connects to the air heater valve in winter. Here it is
And the other end of their connection goes here (in the photo, the finger points where to connect, there's a sensor with three leads, into one of them)
Where the EGR management system used to be, only one single sensor should remain, see picture below:
And plug the tube coming straight from the intake manifold. Without this, the engine won't start. That's all.
The sensor that needs to stay connected goes here
This pipe goes to the absorber (it's next to the exhaust collector)
Also put three jumper cables as shown in the photo below
And generally, it should look like this.
From the engine side almost nothing changes except for unconnected hoses that used to go to EGR.
The main valve naturally does not need to be connected but should stand there as a plug.
It's important not to forget to connect the main hoses
Yes, as I said at first it won't make sense, but those who want to do this themselves will be able to connect everything without problems. The key is to have the engine in front of you and then everything falls into place)
So, four months have already passed since the first start-up, the motor has completed its break-in period and has covered around 5000km. No issues found except for my mistakes) but I'll talk about them later)
Starts easily with the first spark on the coldest day (if the battery is charged and it starts cranking properly immediately, if low, usually from the fifth spark). Semi-automatic preheating works perfectly, two stages as required. And overall everything runs smoothly and beautifully) consumption 9.5 liters in a mixed cycle (traffic jams, then highway, and then city again)
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