Oil pressure sender
 

Howdy all. I just acquired an 83' K20 with a 6.2 diesel. A lot of electrical issuses that need worked out. My question is about the oil pressure sending unit. My oil pressure gauge does not work. I have not found the sending unit and i would like to know where it is on the engine? Should it be mounted on the back of the block? Thanks for any help.

Re: Oil pressure sender
 

welcome.....
i.found this on another site...http://www.dieselplace.com/forum/63-...re-switch.html
maybe itll help

It's different on a 6.2 and looks different, so don't go by this picture. It's called pressure switch, but it's the sender for the oil pressure gauge, so not exactly a switch.Anyway, if you take off the air cleaner housing and lay yourself across the middle of the engine, head to the firewall, you should see the vacuum pump on the middle to your left. The pump looks like a pillar (with a driveshaft inside) with a round housing on top (with the diaphragm inside). Now further back and a bit to your right, between the back of the engine and the firewall, there should be a metal cylinder screwed into a fitting down there. The cylinder has a slightly larger diameter on the bottom and should have an electrical contact on top.You can screw that cylinder out, but you'll have to get at it from under the truck where it goes into the fitting: There's a seam between the bottom part that goes into the fitting and the cylindrical housing, and when you start turning the top, the seam won't hold and you end up turning only the top. Once it's out, you can replace it, preferable with a mechanical oil pressure gauge. A mechanical gauge is even cheaper than a new pressure switch.You may have to take off the glow plug relay/controller to get at the pressure switch. If you do so, be aware that one of the large terminals of the relay/controller always has 12V on it, so you might want to disconnect the batteries first.

Re: Oil pressure sender
 

Thanks for the help. There is no oil pressure switch nor is there a glowplug controller. Someone installed a pushbutton with a relay. I will get it figured out.