Hi guys - I'm hoping you can give me a bit of advice - I started to get the engine management light coming on in my 2.0SRi - and on taking it to the local Masterfit it was diagnosed as a faulty camshaft sensor. This was replaced at a cost of £46.50 with £33 labour. The car is usually serviced at a Vauxhall main dealer, but it has been some time. Last week I was driving along the motorway when the oil warning light came on. As I was pulling into a laybay less than 15 seconds later the engine started to make extremely bad noises and cut out. When the RAC guy came out he said it sounded like it had dropped a valve and this was confirmed by the garage who said that it needed a complete engine refit at a cost of £3000+. Now I have a couple of issues - why did the warning light give me less than 15 seconds to stop before irreprable damage was done to the engine - no warning at all in other words, and also what is involved in replacing a camshaft sensor - is this located inside the engine itself - therefore needing it to be drained of oil, or certainly the lack of oil becoming apparent? Apologies for the lack of knowledge, but I thought I'd come to the people who know with these queries. Cheers.
The oil light is activated by low oil pressure, unfortunatley the car makers feel that a nuisanse warning light is worse than a useless one, so they set the oil pressure level that the light comes on at very low.
This means that the 2% of people that tow a caravan up a steep hill in second gear on a 40°C day dont get an anoying light flashing when they idle the engine afterwards because the oil is at 140+°C so there is F all pressure at idle.
Meanwhile for the rest of us, if your tanking down the motorway and the light comes on its normally too late.
As far as I know the cam sensor on the Vaux doesnt require the oil to be messed with, should be a 5-10 min job to change. Though dont take my word for it cos I aint got one. Question is did they drop anything (i.e. the retaining bolt) in the hole?