Oil Pressure Sending Unit

[BillGotthelf]

Just got back from vacation and while towing fifth wheel up I-95 headed towards St. Augustine Fla my oil pressure gauge starts going from 15-40 lbs and then dropping to 0 and the idiot light comes on. I pull off and check everything I could and fiquired it had to be the sending unit- which I could not find- so I chanced starting back up again. After another hour towing the engine was purring so I guessed I really had oil pressure. Well the Dodge dealer in St. Augustine is open on Sat and had the sending unit in stock. He evan asked one of the mechanics where it was for me. You also need a special socket to remove it and need to be a doulbe jointed contortionist to reove it. Got appt for monday morning- 2 hours and $128 later my gauge reads 45 lbs and the idiot light is off.

 

[DieselB59]

For the gauge crazies, like me, a gauge can always be called a liar. That's why I went and installed a second boost and pyrometer gauge. Since we have an oil pressure gauge, it really wouldn't be a bad expense to get an aftermarket gauge and install it to check and confirm the pressure on the dash is accurate. After all, it is a vital reading and we should be able to know if the engine is healthy or not. Senders do go bad. But to this day, I've had my hands in several hundred B series engines, and the only oil related failures I have seen were due to excessive plumbing routed in to send the oil to five different filters and four pre lubers (a rough estimate of course), and one that someone let the oil out of from an ez drain plug as an act of vandalism.