Coolant expansion tank cap missing

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My Name: faro

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Posts: 7
Joined: Mon Jul 29, 2013 8:16 am
Model: C3 2002-2005, Original shape model
Year: 2005 (55)
Engine Size: 1.1
Fuel Type: Petrol
Mileage: 125
Trim Level: VTR+
Gearbox: Automatic PRND
DPF: No

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OK feel a bit daft here. But I have lost the top of the Expansion Water Bottle top. (Cooling System) But I can't just nip to Halfords or the like as we don't have them here. Would it be OK to use the Brake Reservoir Top until I can find a new Expansion Water Bottle top. I know the Expansion Water Bottle top has some sort of valve on it. Any advise please.

Citroen C3 2005 Petrol 1.1

Many Thanks. Bill.
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My Name: Arfur Dent

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Model: C3 2002-2005, Original shape model
Year: 2002 (52)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 100000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
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Hi Bill
faro wrote:OK feel a bit daft here. But I have lost the top of the Expansion Water Bottle top. (Cooling System) But I can't just nip to Halfords or the like as we don't have them here. Would it be OK to use the Brake Reservoir Top until I can find a new Expansion Water Bottle top. I know the Expansion Water Bottle top has some sort of valve on it. Any advise please.
The coolant expansion cap is designed to work with high pressures and temperatures where the brake reservoir is not pressurised or heated. I would expect each to be made from different materials suited to each job.

I would also worry more about getting dirt into the braking system over the loss of some coolant or a reduced cooling capacity.


The C3 coolant expansion cap is used on several of the Citroen models so I don't think it would be difficult to get one delivered quickly from ebay, there are plenty HERE :)
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