Carrying on from Lorin's Oil Pressure Woes thread and the ensuing discussion over oil pressure, I took delivery of a comprehensive oil pressure testing kit and gauge today from RDGTools. Having replaced the pressure sender and having performed the FSM checks, I could not find any reason why the gauge didn't work. Slightly worried that in fact I had NO oil pressure at all, I thought it best to check it out. I have had the sender off a couple of times and it's a right little bugger to get at, so I thought I'd post the wisdom for anyone else going this way.
The sender is a small round canister just to the right and below of the oil filter. It has two wires; one spade terminal and one sort of clip on swivel that goes onto the central little 'tit' on the canister. Best thing to do is remove the oil filter. It gives you so much more room. The undo the two 12mm headed bolts that secure the dipstick tube and twizzle it anti clockwise out of the way. Next undo a connector that goes to a sensor in the block right above the sender unit. This allows you to wield a spanner. Disconnect the two leads on the sender. You can use a tie wrap or string to try and pull some of the loom out of the way if you are struggling. I have been in there so many times I'm pretty practised at it.
Using a 14mm open ended spanner you can now just get onto the nut which is part of the back of the unit. You'll probably have to undo it one facet at a time reversing the spanner to get onto the nut. There is sufficient room to get quite a good arc. And as they say is it. Fiddly and at times you'll wish you had a third arm. I struggled a bit at first and tried water pump pliers from below. The new Milner sender didn't like that and the canister actually turned not the taper thread. So that was that fnurked. I had to put the old one back in which worked just as badly as the new one
The testing kit comes with a myriad of connectors and I went for a 90 degree elbow combination as the hose to the gauge doesn't have a swivel on the end so screwing it in, in line was a no-go.
All nipped up and started the engine. Really relieved to say that the oil pressures were bang on the mark. PHEW
OK £40 and some bu**ering around, but I can sleep peacefully now. OK it was always doubtful that the oil pump was duff, but now knowing the history of this truck and as it stood for 8 years in a yard, you just never know. I thought that the pick up strainer may have been blocked too. Going to do the BEBs very soon so we'll have a look there at the same time. If the pressure had been zero, I doubt that it would have run for very long without going bang. But now I know.
One day I WILL get it working.
Chris
The sender is a small round canister just to the right and below of the oil filter. It has two wires; one spade terminal and one sort of clip on swivel that goes onto the central little 'tit' on the canister. Best thing to do is remove the oil filter. It gives you so much more room. The undo the two 12mm headed bolts that secure the dipstick tube and twizzle it anti clockwise out of the way. Next undo a connector that goes to a sensor in the block right above the sender unit. This allows you to wield a spanner. Disconnect the two leads on the sender. You can use a tie wrap or string to try and pull some of the loom out of the way if you are struggling. I have been in there so many times I'm pretty practised at it.
Using a 14mm open ended spanner you can now just get onto the nut which is part of the back of the unit. You'll probably have to undo it one facet at a time reversing the spanner to get onto the nut. There is sufficient room to get quite a good arc. And as they say is it. Fiddly and at times you'll wish you had a third arm. I struggled a bit at first and tried water pump pliers from below. The new Milner sender didn't like that and the canister actually turned not the taper thread. So that was that fnurked. I had to put the old one back in which worked just as badly as the new one
The testing kit comes with a myriad of connectors and I went for a 90 degree elbow combination as the hose to the gauge doesn't have a swivel on the end so screwing it in, in line was a no-go.
All nipped up and started the engine. Really relieved to say that the oil pressures were bang on the mark. PHEW
OK £40 and some bu**ering around, but I can sleep peacefully now. OK it was always doubtful that the oil pump was duff, but now knowing the history of this truck and as it stood for 8 years in a yard, you just never know. I thought that the pick up strainer may have been blocked too. Going to do the BEBs very soon so we'll have a look there at the same time. If the pressure had been zero, I doubt that it would have run for very long without going bang. But now I know.
One day I WILL get it working.
Chris
