hi guys oil warning light just came on and gauge dropped to nothing as like when ignition turned of, plenty of oil on dip stick, thinking presser switch has gone. can any one tell me how to check if this is the problem please. engine runs and sounds fine,

 

mine did the same thing. especially if i let it sit for a few days. goes right away after about 5 minutes though. hasnt done it in a while. probably your oil sending unit

 

scrape up $50 for the switch kit, a spare combination spanner, and a torch....(not what we in the States call a "flashlight") but the kind with a flame. Clamp open end of spanner in the vice and heat the stem at that end until you can bend the *F^ out of it to more-or-less match the angle on the box-end.
(Quench so as not to transfer intense heat to palm of hand.)
use new toy to swap transducer for new pressure switch, plug resistor-jumper on press. swt and plug pre-existing connector to jumper. Ignore instructions regarding reprogramming inst. pack. Fire up, leak-check and observe rock-solid 47 psi on guage, no warning light...proving you have at least 8 psi oil P!

Mine (a 95 VDP 4.0L) was a 19mm but I saw an earlier version mill removed from its car in the shop floor that required an 18 mm (lil' bit loose) or British Std. of now-forgotten size (just shy of 18 mm ~ 11/16"?)

 

Hi Madfred, I have a 97 X300, same happened to me, put her in yesterday for service, oil filter removed, sender unit removed 5 min's, cleaned and screwed back in and has been perfect since.

 

hi guys sorry for late reply work and all that,any way took switch off gave a clean, seams as good as new now

 

Sender is cheap and the exchange is simple. Not worth it to repair. Replace it and you will have peace.

 

working fine at mo but will replace thanks