Vauxhall Astra Estate LS1600i 8V Dual Fuel. Registered 01.10.2003. DG53 OKT. Approx. mileage 80000.Chassis No. WOLOGTF 3532291236. Engine No. Z16SE 02PR8135. Works well on both petrol and gas.

I have a gas leak under the bonnet which I smelt when running the engine to defrost the car recently. I am currently running on petrol when the gas leak stops.

Using soapy water I found the gas leak which is on a device immediately downstream of the vaporiser with a single hose on the inlet and four hoses on the outlet which I shall call the splitter.

On a flat on top of the splitter is what I have called a bush (Approx. 3/4 in, dia., 1/4 in deep with sort of rounded flats on it. This bush has a screw and O ring seal on the top.

The gas leak is between the bush and the splitter body.

Can anybody advise me please:

1.Who did the OEM conversion on behalf of Vauxhall?

2. Can I unscrew this bush without damage and seal the leak? A new splitter costs £195.00 , but cannot be positively identified be the Vauxhall main dealer gas technician. I have to pay up front and cannot be guaranteed my money back if it is the wrong type.

3. Any other suggestions

Thanks Hoping somebody can help. Olea100