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[addy]

Thanks for the information, it is a great help. I will get the car up in the air and check it when warm.

[biggriffin]

Auxiliary pumps leak, check those.

[terry paget]

Thanks for the information, it is a great help. I will get the car up in the air and check it when warm.

Up in the air helps, but is not necessary. When last I had a coolant leak, with engine running and hot, I set temperature to MAX, knelt down and looked at ground below rear of engine, no drips. Changed setting to MIN, looked again, and saw a steady drip. HBV, thought I. Scuttle off job, but not too bad, and had one in stock.

[addy]

Hi Terry Paget I did what you suggested. I put the heating to cold, the wife went out and had to put coolant in as normal. Went out to the car this morning to check coolant, had to put some in. When the wife pulled away, there was a medium sized puddle that would of been around the middle of the car, at the back of the engine. Before the wife left I set the heaters to hot, without blowers. She went 30 odd miles and the coolant warning light never came on. So still going to put the dye and the colourant in that Entwood suggested, but it is looking like it might be the HBV, reading comments. I priced Genuine VX one from the local dealer £24 inc Vat, but they have none on the shelf, so need to order and hopefully should be within 2 days for collection.

Debating wether to have a go myself or give someone else the aggro. LOL

[terry paget]

As I said in reply 3, HBV failure is common on Omegas, and may leak either on MAX heat or MIN heat setting (or auto of course). When failed it leaks briskly, and coolant can be seen dripping below the rear of the head, as you have discovered. It's worth confirming by this test before you embark on replacement, but now it seems very likely.

[polilara]

I am so lazy that when I have coolant loss I usually change HBV first and start to think after that if that did not help. I have found that I have to change HBV after each 3-5 years, anyway, (perhaps I bought bad quality), reasonable job and quite cheap part.