Experiencing Car Vibrations and Loss of Brake Fluid in Opel Corsa C 1.2 80 KM - Cold Start

Hello,
for a long time I have a problem with car vibrations / jerks when starting / shifting gears (especially 1,2,3) on a cold one. This only occurs during a gear change.
Additionally, it only occurs as I increase gear, not decrease.
This phenomenon does not always occur, and my recent observations indicate that they are favored by rain outside and / or lower temperature (although nothing happens after flooding the car at the car wash with water).
An additional symptom observed is the loss of brake fluid (it had to be refilled several times, so this is not the use of the brakes), which escapes in an undiagnosed place.
I have also recently noticed that when this problem occurs, the brake pedal is hard, the brakes do not brake as hard as ever, as if there was air in them.
As soon as one of the observed factors ceases (e.g. vibration / jerks when shifting gears), the other also disappears (e.g. brakes start working normally, ABS engages when it should, etc.).
Releasing the slow / fast clutch does not help, the problem still occurs, also regardless of revolutions
After the engine is warmed up, the problem completely disappears.
The computer shows no errors.
Mentioned: Ignition coil module, Candles, Filters, Oils, Fluids.

zxcdsa wrote:

Hello,
for a long time I have a problem with car vibrations / jerks when starting / shifting gears (especially 1,2,3) on a cold one. These vibrations are only made when shifting gears.
Plus, they only occur as I increase gear, not decrease.
These vibrations do not always occur, and my recent observations show that they are favored by rain outside and / or lower temperature (although after flooding the car at the car wash with water, nothing happens).
An additional symptom observed is the loss of brake fluid (it had to be refilled several times, so this is not the use of the brakes), which escapes in an undiagnosed place.
I have also recently noticed that when this problem occurs, the brake pedal is hard, the brakes do not brake as hard as ever, as if there was air in them. As soon as one of the observed factors ceases (e.g. vibration when shifting gears), the other also disappears (e.g. brakes start working normally, ABS engages when it should, etc.).
Releasing slow / fast clutch does not help, vibrations still occur, also regardless of speed.
After the engine is warmed up, the problem completely disappears.
The computer shows no errors.
Mentioned: Ignition coil module, Candles, Filters, Oils, Fluids.

Buddy, you forgot about the candle wires!
This is an element that can seriously interfere with the proper operation of the engine (especially when it is cold with wet cables)
However, I am worried about the loss of brake fluid.
This gives food for thought.
The car should have the braking system checked immediately.
This endangers the driver and other road users!

daro31ie wrote:

Buddy, you forgot about the candle wires!
This is an element that can seriously interfere with the proper operation of the engine (especially when it is cold with wet cables)
However, I am worried about the loss of brake fluid.
This gives food for thought.
The car should have the braking system checked immediately.
This endangers the driver and other road users!

Corsa C. The spark plug / HV leads are complete with an ignition coil module that has been replaced with an original, expensive pleasure.
Loss of brake fluid - the clutch system is a hydraulic system fed with brake fluid, these are two separate circuits. This loss is not very significant, but it also worries me. Braking system reviewed, tight. The wires are ok.
After careful observation, it was found that there is a possibility that it is dripping from the clutch slave cylinder, but this is for verification and observation while driving.

The car has recently been inspected at a fairly rigorous diagnostic station, and they didn't say anything about it, even though I asked them to check it. The mechanic was watching too and only noticed that. I want to get to the problem and solve it.

I will only specify one more. Car vibrations / jerks occur when releasing the clutch in "driven" gear.

The only thing that has to do with the engine and the brakes is the tightness of the tube between the servo and the intake manifold. As for the leak, it can also release the clutch pump inside the cabin.

ociz wrote:

The only thing that has to do with the engine and the brakes is the tightness of the tube between the servo and the intake manifold. As for the leak, it can also release the clutch pump inside the cabin.

I need to see the clutch pump.
Okay, what about vibrations? What could be causing this? Clutch to be replaced? What, then, would the moisture in the air have to do with it?

Do not philosophize, just check what I wrote. The clutch can also slip on the fluid that may leak from the clutch.

ociz wrote:

Do not philosophize, just check what I wrote. The clutch can also slip on the fluid that may leak from the clutch.

The pump is ok, nothing leaks.