Temperature gage went down in traffic.

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My Name: Jakeywakey93

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Posts: 9
Joined: Wed Sep 22, 2021 9:28 am
Model: C3 2002-2005, Original shape model
Year: 2004 (04)
Engine Size: 1.4 i
Fuel Type: Diesel
Mileage: 74000
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
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Hi I have a diesel 2004 c3.

It normally reaches 3 blocks temperature wise, and sits there quite comfortably.
This evening, I was sat I'm stopped traffic for about ten minutes , engine on. Its a cold 3°c outside. I noticed, as I drove away that it had gone down to two blocks again. It didn't take long to get back to three when I drove back again.
Is this normal to cool down In cold temperatures?
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My Name: Arfur Dent

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Posts: 3340
Joined: Sat Jul 23, 2011 3:47 pm
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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Jakeywakey93 wrote: Fri Dec 10, 2021 5:09 pm Hi I have a diesel 2004 c3.

It normally reaches 3 blocks temperature wise, and sits there quite comfortably.
This evening, I was sat I'm stopped traffic for about ten minutes , engine on. Its a cold 3°c outside. I noticed, as I drove away that it had gone down to two blocks again. It didn't take long to get back to three when I drove back again.
Is this normal to cool down In cold temperatures?
Hi

Mine doesn't do this, but I wouldn't worry too much.

You can check there is sufficient coolant in the reservoir when the engine is cold. This can help tell if there is a problem, along with the colour of the coolant in there.

The level should be between MINI and MAXI and the colour is PINK.
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My Name: PeraltaBrooklynn

Member
Posts: 2
Joined: Fri Dec 10, 2021 5:11 pm
Model: C3 2002-2005, Original shape model
Year: 2004 (04)
Engine Size: 1.4
Fuel Type: Diesel
Mileage: 80000
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)

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Hi, yeah the coolant level is perfect. I check it bi-weekly.
I took it for another test drive (its now 2°c ) at one point about 3 minutes after reaching 3 blocks it dropped down to 2, but came back again after about 2 minutes. And it didn't go down for the rest of the journey (around 15 more minutes).
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My Name: Arfur Dent

Guru
Posts: 3340
Joined: Sat Jul 23, 2011 3:47 pm
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)
Has thanked: 271 times
Been thanked: 114 times

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It could be that the thermostat is stuck open.

Does it take a long one to heat up to 3 bars?

The thermostat stuck open would make it slow to warm up and re-warm after a stop.
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My Name: PeraltaBrooklynn

Member
Posts: 2
Joined: Fri Dec 10, 2021 5:11 pm
Model: C3 2002-2005, Original shape model
Year: 2004 (04)
Engine Size: 1.4
Fuel Type: Diesel
Mileage: 80000
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)

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It takes about ten minutes to heat up. And once it's dropped one it doesn't take long to go back to three again. (Well I've only noticed it dip twice!).
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