brake servo leak

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My Name: Essa

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Hello, my family member bought a Citroen c3 connection HDI 1.4 last month. I noticed that the car was leaking oil in the drive way while parked but couple of drops over a couple of days being stood. I booked the car for general check up and the dealers it passed the basic health check but the mechinc said there is a leak but coudent pin point, it would need further investigating at further cost. I told him the car had top head done and new clutch Intalled, maybe it was oil resdue the car had alot of oil spills. I eventually took in to a another local garage after wasing the engine bay out, the mechincs said the leak was from the brake servo and it was excessive. My question is how could I verify this to see if it indeed is the brake servo leaking? Not sure where it is located in the engine bay is there any blown up engine diagram. Also what colour is the oil ment to be in the brake servo?

Thankyou
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Essa wrote: Sun Dec 16, 2018 7:26 pm Hello, my family member bought a Citroen c3 connection HDI 1.4 last month. I noticed that the car was leaking oil in the drive way while parked but couple of drops over a couple of days being stood. I booked the car for general check up and the dealers it passed the basic health check but the mechinc said there is a leak but coudent pin point, it would need further investigating at further cost. I told him the car had top head done and new clutch Intalled, maybe it was oil resdue the car had alot of oil spills. I eventually took in to a another local garage after wasing the engine bay out, the mechincs said the leak was from the brake servo and it was excessive. My question is how could I verify this to see if it indeed is the brake servo leaking? Not sure where it is located in the engine bay is there any blown up engine diagram. Also what colour is the oil ment to be in the brake servo?

Thankyou
Hi Essa

You should not have oil in a brake servo. The brake servo is an air driven brake assistance device. It makes the brakes easier to apply. It is also known as a brake booster.

The closest you can get to any sort of oil near the brake servo is brake fluid from the brake master cylinder and if this is leaking, don't drive the car because have a potential brake failure imminent.
My Name: Essa

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Posts: 39
Joined: Sun Dec 16, 2018 6:42 pm
Model: C3 2009-2013, New shape (A51)
Year: 2010 (60)
Engine Size: 1.4 (8v)
Fuel Type: Diesel
Mileage: 80000
Trim Level: Other
Gearbox: Manual 5 speed
DPF: Yes
LHD or RHD: RHD (UK)
Engine name: DV4 diesel (70 PS)
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C3CAR wrote: Sun Dec 16, 2018 7:58 pm
Essa wrote: Sun Dec 16, 2018 7:26 pm Hello, my family member bought a Citroen c3 connection HDI 1.4 last month. I noticed that the car was leaking oil in the drive way while parked but couple of drops over a couple of days being stood. I booked the car for general check up and the dealers it passed the basic health check but the mechinc said there is a leak but coudent pin point, it would need further investigating at further cost. I told him the car had top head done and new clutch Intalled, maybe it was oil resdue the car had alot of oil spills. I eventually took in to a another local garage after wasing the engine bay out, the mechincs said the leak was from the brake servo and it was excessive. My question is how could I verify this to see if it indeed is the brake servo leaking? Not sure where it is located in the engine bay is there any blown up engine diagram. Also what colour is the oil ment to be in the brake servo?

Thankyou
Hi Essa

You should not have oil in a brake servo. The brake servo is an air driven brake assistance device. It makes the brakes easier to apply. It is also known as a brake booster.

The closest you can get to any sort of oil near the brake servo is brake fluid from the brake master cylinder and if this is leaking, don't drive the car because have a potential brake failure imminent.
Thankyou for the heads up, the car mechanicwrote wrote this " brake servo oil seal". So not sure whether it's the master or servo?. Is there a way j could verify this?
Also is it a easy fix, could not find a c3 2011 hanyes workshop manual.
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Essa wrote: Sun Dec 16, 2018 8:18 pm Thankyou for the heads up, the car mechanicwrote wrote this " brake servo oil seal". So not sure whether it's the master or servo?. Is there a way j could verify this?
Also is it a easy fix, could not find a c3 2011 hanyes workshop manual.
I suspect that the mechanic meant to write 'seal' rather than 'oil seal'.

Based on your comments, and please don't take this the wrong way, I wouldn't be attempting a repair of this nature myself. To work on the car's braking system is serious stuff especially if you're not 110% sure what you're doing.
If at first you don't succeed, destroy all the evidence and pretend you never tried :lol:
My Name: Essa

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Posts: 39
Joined: Sun Dec 16, 2018 6:42 pm
Model: C3 2009-2013, New shape (A51)
Year: 2010 (60)
Engine Size: 1.4 (8v)
Fuel Type: Diesel
Mileage: 80000
Trim Level: Other
Gearbox: Manual 5 speed
DPF: Yes
LHD or RHD: RHD (UK)
Engine name: DV4 diesel (70 PS)
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Missing Lincs wrote: Mon Dec 17, 2018 3:06 pm
Essa wrote: Sun Dec 16, 2018 8:18 pm Thankyou for the heads up, the car mechanicwrote wrote this " brake servo oil seal". So not sure whether it's the master or servo?. Is there a way j could verify this?
Also is it a easy fix, could not find a c3 2011 hanyes workshop manual.
I suspect that the mechanic meant to write 'seal' rather than 'oil seal'.

Based on your comments, and please don't take this the wrong way, I wouldn't be attempting a repair of this nature myself. To work on the car's braking system is serious stuff especially if you're not 110% sure what you're doing.
So most likely it's the brake master seal, looks its contaminated, dark oiI drains on the ground.

Definelty taking to a local garage but wanted to make sure it was the brake master that was leaking and nothing else.


Any way to verify it's the master that s leaking, the first mechanic did t get good vibes off him if you know what i mean.
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My Name: C3CAR

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Posts: 2621
Joined: Wed May 04, 2011 10:01 am
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 140000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
Has thanked: 148 times
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Essa wrote: Mon Dec 17, 2018 4:19 pm Any way to verify it's the master that s leaking, the first mechanic did t get good vibes off him if you know what i mean.
Start the engine and depress the brake pedal. If it travels to the floor, you definitely have a brake fluid leak somewhere.

If there is brake fluid around the master cylinder and/or servo, either you spilled it when topping up the brake fluid or its leaking.

Check the brake master cylinder reservoir for level and if it is below MIN, then you have a leak.

If you even suspect a leak on the braking system, don't drive the car, as it may not stop.
Essa wrote: Mon Dec 17, 2018 4:19 pm Definelty taking to a local garage but wanted to make sure it was the brake master that was leaking and nothing else.

The local garage mechanic would be the best person to identify the problem because they are experienced and have the car in front of them. It is much easier to diagnose a leak when you have the car before you. Let the mechanic diagnose the problem and suggest a solution.
Missing Lincs wrote: Mon Dec 17, 2018 3:06 pm To work on the car's braking system is serious stuff especially if you're not 110% sure what you're doing.

+1 to that :)
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