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Author Topic: Coolant loss in Vectra  (Read 268 times)

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terry paget

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Coolant loss in Vectra
« on: 05 August 2019, 19:45:54 »

2008 Vectra 1.8 petrol manual hatchback 101,000 miles
Slow coolant loss. I cannot see any leaks, steam, or coolant under car. No damp carpets, I don't think the car has a heater bypass valve. Might it be a cracked header tank pipe conection? I recall DG recommending pricing in a new radiator when I was looking at a used Vectra of similar mileage.
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dave the builder

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Re: Coolant loss in Vectra
« Reply #1 on: 05 August 2019, 19:53:06 »

any steam from the exhaust - head gasket  :-\ water in the oil,high oil level etc
wet footwell carpets -heater matrix  :-\
pipes into the bulkhead for heater matrix
remove the grill and look closer at the rad
water pump
small leaks are hard to find , tissue paper will wrap round pipes etc and show if it leaks
fresh cardboard under may show where it drips
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Doctor Gollum

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Re: Coolant loss in Vectra
« Reply #2 on: 05 August 2019, 20:13:16 »

A pint says radiator or coolant cap ;)
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zirk

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Re: Coolant loss in Vectra
« Reply #3 on: 05 August 2019, 20:28:30 »

A pint says radiator or coolant cap ;)
Probably Cap they break up into pieces under the Cap.
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terry paget

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Re: Coolant loss in Vectra
« Reply #4 on: 08 August 2019, 18:46:25 »

Thanks for advice.
The coolant level in the header tank used to rise as the coolant heated and expanded, then fell back as coolant cooled. After changing the cap the coolant level falls as the engine heats up, but if I remove the cap coolant level rises back to the line, and I hear a hiss of released pressure. Faulty cap seems likely.
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zirk

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Re: Coolant loss in Vectra
« Reply #5 on: 08 August 2019, 22:53:07 »

Thanks for advice.
The coolant level in the header tank used to rise as the coolant heated and expanded, then fell back as coolant cooled. After changing the cap the coolant level falls as the engine heats up, but if I remove the cap coolant level rises back to the line, and I hear a hiss of released pressure. Faulty cap seems likely.
Sounds like it could be pissing out the cap and now youve got air in the system
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Doctor Gollum

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Re: Coolant loss in Vectra
« Reply #6 on: 08 August 2019, 23:08:44 »

Having a built in overflow channel doesn't help either ::)
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Andy B

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Re: Coolant loss in Vectra
« Reply #7 on: 09 August 2019, 12:08:58 »

...... the coolant level falls as the engine heats up, but if I remove the cap coolant level rises back to the line, and I hear a hiss of released pressure.  ......

That sounds correct to me .....
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