luke keeper of badger Posted October 17, 2010 Share Posted October 17, 2010 hi can anybody tell me the male thread size of oil pressure sender i want to go to a mechanical gauge v8 flapper std pump 1986 ish cheers luke Quote Link to comment Share on other sites More sharing options...
Range Rover Blues Posted October 17, 2010 Share Posted October 17, 2010 Not sure, I think it's something BSP but you shouldn't need to remove the pressure switch on a V8, there are tappings that were used on 70's RRC in the oil pump for an oil guage. Quote Link to comment Share on other sites More sharing options...
MikeAK Posted October 18, 2010 Share Posted October 18, 2010 I think two of the ports on the pump (one of which is used for the pressure switch) are 1/2" UNF. The third port is larger, not sure of the thread. Of course I could be completely wrong! Mike Quote Link to comment Share on other sites More sharing options...
Range Rover Blues Posted October 18, 2010 Share Posted October 18, 2010 3rd one might be the pressure releif valve. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted October 18, 2010 Share Posted October 18, 2010 Mostly the pressure sensor/switch thread is 1/8" BSP but I have had one that was something different, more like 1/4" or even 3/8". As said above, you should be able to find a spare tapping on the pump cover to stick a pressure gauge into, and gauges usually come with adapter kits - if not, VWP sell them. Quote Link to comment Share on other sites More sharing options...
MikeAK Posted October 19, 2010 Share Posted October 19, 2010 Hi again, Just checked the 3 pump covers I have in the garage and the 2 smaller ports are definiatly 1/2" UNF, one of these has the oil pressure switch in it. Still not sure about the larger one but measuring the plug from it it looks like 9/16" UNF. This is not the oil pressure relief valve. UNF does make some sense as this was orignally an American engine. The oil pressure relief valve is the 4th even larger "port" Mike Quote Link to comment Share on other sites More sharing options...
bobtail84 Posted October 19, 2010 Share Posted October 19, 2010 I can't remember the thread size but I used this and it was the right thread and worked with my OE gauge in my RRC. HTH. Jeff Quote Link to comment Share on other sites More sharing options...
luke keeper of badger Posted October 23, 2010 Author Share Posted October 23, 2010 cheers guys being on the tight side,,,,ive got a tim gaudge mechanical installed in the dash was there when i brought the old girl, its never been plumedin, ive also got a working old range rover gaudge, looks like it will be easy to get rangerover sender from rimmers as advised,, but is that the best option whats most reliable.... megasquirt has got hold of me right now so saving pennies to make pounds....cheers for your input luke Quote Link to comment Share on other sites More sharing options...
Davo Posted October 25, 2010 Share Posted October 25, 2010 I was just fiddling with this on my own '83 Rangie not long ago and yes, two ports are 1/2" UNF while the bigger one is indeed 9/16" UNF. The oil pressure sender and oil light switch are 1/2", and the oil temp is 9/16". Since they're not tapered threads, you do need some new copper joint washers as well. (I know this because I didn't have them!) Quote Link to comment Share on other sites More sharing options...
luke keeper of badger Posted October 26, 2010 Author Share Posted October 26, 2010 looks like ive got it worked out now,,got an adaptor 1/2unf to 1/8 npt from ebay and pipe kit for gauge . job done. 120635545304 auction number next job need to find a capillary water temp gauge 5/8 unf...... cheers gents luke Quote Link to comment Share on other sites More sharing options...
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