hello guys, on my saph 4x4 above starter mortor, there is a nut into the block its about 25mm with a little thread out the middle. wot is it 4, is it oil temp or pressure switch and where do i get a new 1 from, thanks shaun

 

oil pressure light switch, can get one from most motor factors even Halfrauds!

 

Not unknown to explode either!!
Get one asap.
tabetha