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All pictures and texts in this web page are the property of nomaallim.com. Any use of any part of those contents without the written consent of nomaallim.com shall be subject to legal procedures as per international and local laws in the concerned country. Using the name "nomaallim" or "nomaallim com" or "nomaallim.com" in the text describing the unauthorized copied content shall not constitute an exception and shall be sanctioned in accordance to the effective laws and proceedings.
BEFORE YOU START
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DISCLAIMER:
Our pictorials are of informative nature and do illustrate works carried out by ourselves at our own premises for our own use and satisfaction.
Readers who envisage to carry out similar works inspired by the below method shall do this at their own risks and liability.
Our pictorials are of informative nature and do illustrate works carried out by ourselves at our own premises for our own use and satisfaction.
Readers who envisage to carry out similar works inspired by the below method shall do this at their own risks and liability.
What to do when the clutch pedal goes to the floor without resistance
If your clutch pedal started suddenly going to the floor without resistance, this means you have a slow leak of brake fluid that went unnoticed, which lowered the brake fluid level in the reservoir, causing the clutch hydraulic command system to be filled with air.
Open the hood, find the brake fluid reservoir, open it and check the brake fluid level.
You will then notice that:
Open the hood, find the brake fluid reservoir, open it and check the brake fluid level.
You will then notice that:
- it is low
- it is lower than the hose which connects the reservoir to the clutch master cylinder
This picture shows the hose that feeds the clutch hydraulic cylinder of the Dacia Duster (look to the right of the reservoir), and which is anyhow the only hose going out of the reservoir.
The brake fluid level went down to below the "MIN" mark and below the hose, thus causing the clutch command to fill with air.
As a result, the clutch pedal will go to the floor without any resistance.
The brake fluid level went down to below the "MIN" mark and below the hose, thus causing the clutch command to fill with air.
As a result, the clutch pedal will go to the floor without any resistance.
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How to fix a clutch pedal going to the floor on the Dacia or Renault Duster
First of all, you need to find the leak of the break fluid, which is caused by any of the clutch hydraulic system, the brakes or both.
Check for the leak as follows, by order of precedence:
Check for the leak as follows, by order of precedence:
- if there are any traces of brake fluid underneath the gearbox on the floor, which denotes a leak from the clutch hydraulic release bearing
- the connecting tube between the clutch master and slave cylinders
- the rear drum brakes, you'd eventually notice brake fluid on the rear wheel hubs
- the front disc brakes, to be checked last because as a general rule, leaks from brake cylinders fitted to drum brakes are more common than leaks from cylinders of disc brakes.
In this case of a 2012 Dacia Duster with 125,000 Km odometer, the hydraulic clutch bearing was found leaking and so the cylinder of the rear left drum brake, which was found suffering from a slow leak however as shown in the below pictures.
The clutch hydraulic tube and the clutch bearing hydraulic connector are dry, there's no leak at this level, while the rear left brake cylinder suffers from a very slow brake fluid leak. The problem is however shown further below.
The clutch hydraulic tube and the clutch bearing hydraulic connector are dry, there's no leak at this level, while the rear left brake cylinder suffers from a very slow brake fluid leak. The problem is however shown further below.
A white plastic tray placed under the vehicle has clearly shown how the brake fluid is leaking to the floor from the clutch housing, which clearly indicates a leak out of the clutch release bearing. The honey like color of the fluid is typical to brake fluid.
The below leak was observed over a period of 3 days, until the clutch failed:
The below leak was observed over a period of 3 days, until the clutch failed:
This is the faulty part, the hydraulic clutch release bearing, found inside the clutch housing, i.e. between the gearbox and the engine.
Its replacement method will soon be available on our site.
Its replacement method will soon be available on our site.
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How to fix a clutch pedal to the floor
You need indeed to fix the brake fluid leak, then refill the brake fluid reservoir and bleed the system.
You may however add brake fluid and bleed (purge) the clutch slave cylinder in order get back your car to work and until you find and fix the leak.
For bleeding the slave cylinder of the Dacia Duster clutch system, proceed as follows:
Start by filling your brake fluid reservoir in excess, beyond the MAX mark, then make room to easily access the clutch slave cylinder by attaching whatever harnesses or hoses together with a cable tie:
You may however add brake fluid and bleed (purge) the clutch slave cylinder in order get back your car to work and until you find and fix the leak.
For bleeding the slave cylinder of the Dacia Duster clutch system, proceed as follows:
Start by filling your brake fluid reservoir in excess, beyond the MAX mark, then make room to easily access the clutch slave cylinder by attaching whatever harnesses or hoses together with a cable tie:
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Plug a transparent hose into the purge nipple of the clutch slave cylinder then take out its holding clamp with a flat screwdriver.
Pull out the outer part of the clutch cylinder so it holds on the purge position.
Ask someone to gently press on the clutch pedal to mid-travel and use a large syringe to bleed the circuit and purge the air.
Repeat the same enough times until no more air comes out of the clutch cylinder.
Be careful not to push back you syringe while the cylinder is in the purge position, you'd rather put it back in its normal position, take out the syringe of the hose, push it in, then reconnect the hose and place again the cylinder in purge mode.
That's it, this will fix you clutch pedal going to the floor without resistance, only until you solve the brake fluid leak issue.
Pull out the outer part of the clutch cylinder so it holds on the purge position.
Ask someone to gently press on the clutch pedal to mid-travel and use a large syringe to bleed the circuit and purge the air.
Repeat the same enough times until no more air comes out of the clutch cylinder.
Be careful not to push back you syringe while the cylinder is in the purge position, you'd rather put it back in its normal position, take out the syringe of the hose, push it in, then reconnect the hose and place again the cylinder in purge mode.
That's it, this will fix you clutch pedal going to the floor without resistance, only until you solve the brake fluid leak issue.
