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Author Topic: overheating  (Read 965 times)

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derek89

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overheating
« on: 23 July 2011, 19:11:20 »
towed caravan home friday,temp was 92-95.Next morning
expansion tank was empty and puddle under car.Topped up said tank but now guage is fluctuating between 85-95+.
Bled any air out and fan kicks in at 95,can anyone help as i've not had this problem before  :(
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Varche

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Re: overheating
« Reply #1 on: 23 July 2011, 20:06:49 »
Hi, is it the first time you have towed for a while or ever with this car?

Mine never misbehaved temp wise till I towed. Turned out to be radiator blocked with years of debris. Needed a good flush
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derek89

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Re: overheating
« Reply #2 on: 23 July 2011, 21:08:29 »
Have been towing with this car for 10years but this is the first time i've had this cooling problem
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Varche

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Re: overheating
« Reply #3 on: 23 July 2011, 21:20:30 »
Might just be something as simple as the hbv(heater bypass valve) . They very commonly fail on Omegas. It is located at the back of the engine under the windscreen scuttle and wiper assembly. Three pipes 3/4 inch approx go into it and a small vacuum pipe. The rubber membrane inside perishes over time. Is the puddle located at the back of the engine? If you  use air con that sometimes creates a puddle under the car just to confuse things but is quite normal!

Replacement is fairly straightforward. Use a genuine VX one(maybe £35 to£40). pattern ones don't last.
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derek89

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Re: overheating
« Reply #4 on: 23 July 2011, 22:50:07 »
Air con not working so i know it's not that but wet patch was large under engine but no wet evidence anywhere on engine so will check heater membrane tomorrow.Thanks for your help
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