Vapour from the exhaust manifold

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My Name: hossamsvndee

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Model: C3 2002-2005, Original shape model
Year: 2005 (55)
Engine Size: 1.4 i
Fuel Type: Petrol
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Hello everyone,

It tooks me 24 houres to replace the head gasket on my citroen c3 1.4i 2005.
When i took out the thermostat to replace it (before starting) i broke the plastic that holds the coil but i replaced it anyway :/
I fylled with new oil and just water to flush the oil from the coolant. Then i started up and the engine sounds good, but after 1-5 minutes it starts to come vapour from the exhasut manifold. Is that because of bad thermostat or what have i done wrong?

Best regards.
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My Name: C3driver52

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Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 79984
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Gearbox: Manual 5 speed
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As the system heats up the coolant in the first few minutes it starts to pressurise the system.

You probably have the smallest pin prick of a leak that squirts coolant onto the exhaust manifold causing steam.
My Name: hossamsvndee

Member
Posts: 4
Joined: Mon May 21, 2018 10:17 am
Model: C3 2002-2005, Original shape model
Year: 2005 (55)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 93000
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: LHD (Europe)

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C3driver52 wrote: Mon May 21, 2018 11:32 am As the system heats up the coolant in the first few minutes it starts to pressurise the system.

You probably have the smallest pin prick of a leak that squirts coolant onto the exhaust manifold causing steam.
Thanks for your answer. What should i do? Is it dangerous?
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My Name: C3driver52

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Posts: 2013
Joined: Sat Apr 30, 2011 7:40 pm
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 79984
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: TU3 (75 PS)
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Its not dangerous, other than the engine running out of coolant or you scald yourself with hot water when you are searching for the leak.

Obviously you will want to have the hole repaired, but first you need to find it.

Search carefully, hot exhaust manifold, hot engine, moving parts like the fan can just start when you least expect it, and a jet of boiling water doesn't help.
My Name: hossamsvndee

Member
Posts: 4
Joined: Mon May 21, 2018 10:17 am
Model: C3 2002-2005, Original shape model
Year: 2005 (55)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 93000
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: LHD (Europe)

Post

C3driver52 wrote: Tue May 22, 2018 12:32 pm Its not dangerous, other than the engine running out of coolant or you scald yourself with hot water when you are searching for the leak.

Obviously you will want to have the hole repaired, but first you need to find it.

Search carefully, hot exhaust manifold, hot engine, moving parts like the fan can just start when you least expect it, and a jet of boiling water doesn't help.
Could this happen because i filled with water without bleeding the coolant system?
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My Name: C3driver52

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Posts: 2013
Joined: Sat Apr 30, 2011 7:40 pm
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 79984
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: TU3 (75 PS)
Has thanked: 146 times
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hossamsvndee wrote: Tue May 22, 2018 5:25 pm Could this happen because i filled with water without bleeding the coolant system?
Not usually, it's due to a leak.

What you also may now have is a partially filled system.

When you say water, you should never use just water. That can corrode the system and not work so well when it gets cold :shock:

Coolant filling instructions for the Citroen C3 are here.
My Name: hossamsvndee

Member
Posts: 4
Joined: Mon May 21, 2018 10:17 am
Model: C3 2002-2005, Original shape model
Year: 2005 (55)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 93000
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: LHD (Europe)

Post

I have localized the origin of the vapour and it is the head gasket :(((
I saw that it was burning.
I have apperantly done everything in vain :((
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My Name: Arfur Dent

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hossamsvndee wrote: Sun May 27, 2018 9:54 am I have localized the origin of the vapour and it is the head gasket :(((
I saw that it was burning.
I have apperantly done everything in vain :((
You may have a warped head and this will need exchanging or milling flat.

Maybe the head was not torqued down in the correct order and to the correct readings.

Or, the old head gasket was not completely removed from the head or block?
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