Corsa-B.uk - Vauxhall, Opel and Holden Corsa B Owners Club

Hi to all. Am i correct in thinking this is the oil pressure switch on a corsa b sxi 1.2. I replaced the belt tensioner after it basically snapped, and since then there is a serious oil leak which seems to be coming from the crankshaft pulley (possibly the seal ?). I just want to rule out the switch, thanks for replies

Seems not going by this pic, http://i1199.photobucket.com/albums/aa4 ... 55.jpg,but i cant find it
From what i can see, the oil is running down the engine from where the crankshaft pulley is, the switch isn't near this area is it ?