ElectricBill

Yes, other vehicle manufacturers also use these screens. My Dodge Dakota 4.7 liter V-8 uses one of these screens. I also never heard of such a thing. I have a similar problem. When I first start it, the oil pressure is fine, then the gauge drops to zero after about 30 seconds. I haven't gotten around to fixing it yet. I have a new sending unit. The auto parts store was out of stock on the screens. I figured I would clean it in a jar of gasoline. I seen this post while finding information on oil pressure port access plugs located on the 8.1 liter Chevrolet engine in my dually truck. I am pretty sure this engine uses a screen also. To remove them, take out the sending unit or switch unit. Then inside the threaded hole in the engine block you'll need a dental pick tool to hook it out. It's pretty crazy that they have that shoved in there. Especially being my Dodge looks to have a typical 1/8" NPT threaded hole. That's pretty small to put a screen into but they do it. One other thing that I learned from my friend that is a mechanic for a Ford dealership. He said a lot of oil pressure gages in vehicles are actually not gages. As soon as the pressure "switch" gets as much as 4 psi or higher, the contact closes and sends voltage to the "gauge". This gauge is nothing more than a electromagnetic device that always reads mid deflection in the normal range. Does not matter if there's 4 psi or 80 psi. This is basically an analog idiot light/guage. This is why you'll see the sending unit called an oil switch or oil sensor switch. A regular sending unit is a variable resistance device that changes in resistance value depending upon the pressure. This has a variable/changing current going through a real gauge/meter. This gives you true PSI readings on the dash and you'll see the reading change from an idle to higher RPM. The switch type sending unit will move a tiny bit when you rev the engine, this is because the alternator is putting out more power. It's a very slight movement that's barely noticeable. I think Ford Rangers use this switch type sending unit to the fake dash gauge. People want gauges in their cars/trucks instead of idiot lights right? Well Ford and others did give you gages! Nobody said they needed to be real!!!. LOL