Does anyone know what the thread size is for the oil pressure switch ? Trying to install a oil pressure gauge but i need an adapter but dont know the thread size. car is a series 1 au . Cheers Guys

1/8 NPT

Thanks for the quick reply mate , your a champ.

i was wrong, it's 1/4 npt

Its cool mate i double checked when i bought the adapter and they said it was 1/4 npt . Just finished installing the gauge . Does anyone know what pressure i should be running at idle ? Motor is a standard i6

ooo bradfordau im doiing the same thing to my ba, where did you get the adapter from, and is it a T piece one that does 1/4 into block then has a 1/4 and 1/8 holes for senders/switch, and how much did it set u back? thanks in advance

Go into your local supercheap auto and go to where the guages are , the adaptor kind of looks like an extension but has an extra hole to fit the pressure sender aswell . The brand is calibre and i dont remember the full part number but it ends in 23002 cost me $14 . Good luck mate . As you will soon find out its not as easy as it looks but if you need some info just let me no

i went to auto barn today gave the guy the part number for the adapter and hes like "should be in around 2weeks time, or u can pay 30 bucks shipping and have it in a week, oh and its 20 bucks for the part" i wasn't to impressed, especially after i asked the guy when i bought the gauge if i need anything else to install it and he said no.
im already planing a trip to supercheap auto tomorrow i will defiantly go in and grab it, thanks a million.
and OMG the factory sensor is a b**ch to get off, i tryed to get it off, after about 1 hour, i got a deep socket 19mm and it wasn't deep enough so i have to loosen it by turning the socket with my hand, im gonna get some bad burns when i go the put the sensor on cause i aint gonna wait for the engine to cool down