|
Post by thomashb on Dec 3, 2022 11:53:01 GMT
Spotted, thanks Mike - just read the whole thread from beginning to end.
Vince's work has always been impressive, but I go a bit crosseyed during the technical discussion!
Glad to hear the relocation to the US has been a success
|
|
|
Post by Ken Nelson on Jul 16, 2023 15:55:40 GMT
I have a question about my electric oil pressure sender and gauge on my Coupe. While changing my starter motor I disconnected the wire from sender to gauge and drove around before remembering it. The gauge then read off the scale, but I believe it briefly grounded out (read zero) before I reattached it. Now the gauge only reads in the low range (previously mid-range) although the oil pressure is fine. Any idea what I could have done to throw it off, or to fix the reading again? Thanks. As a followup on this problem, I ordered a replacement 3-litre Coupe oil pressure sending unit to replace the one screwed into the oil filter housing. The old one seemed to work, but the needle would only go up about 1/3 of the way on the gauge. However, with the new sender, the needle now only goes up 1/8 of the way on the gauge. Since the gauge goes up when running and back to zero after shut off, it appears to me that it is working. And previously it was giving a correct mid-scale reading. So I assume that the sender is not giving the correct electrical resistance reading (either too high or low, not sure which). Does any other car have a suitable electrical sending unit with the proper resistance to try? Advice and thoughts appreciated!
|
|
|
Post by dmaxwell on Jul 16, 2023 17:44:42 GMT
I had a similar problem with my '62 E Type Jag. The electric sending unit (and I tried several of them) never seemed to show consistent readings. What I finally did was to buy a Stewart Warner pressure gauge and piping. The gauge fit the housing and I haven't had a bad pressure reading in the last 25 years! I've always been amazed that on my P5 Saloon, Rover installed temp, gas and a ammeter gauges but only put in an idiot light for oil pressure! When I fitted the Chevy 4.3 V6, I put a "T" fittings for the oil pressure so the light would still work but also an oil pressure gauge as well. That and an aftermarket tach completed the gauges I like to have on all my vehicles.
David California
|
|
|
Post by djm16 on Jul 17, 2023 4:21:58 GMT
Interesting! Mine reads a fraction over the "normal" range at all times. I did however have to disassemble it, clean the corrosion inside and re-seal it.
|
|
|
Post by Ken Nelson on Jul 17, 2023 17:21:33 GMT
Thanks David and djm, I'm sure you are right that the easiest solution is to buy an aftermarket gauge and sender, but I really want to keep all the gauges matching in appearance. I've gone further and found that when I short out my gauge it indeed goes up to max with the ignition on, and drops to zero again with ignition off, so confirms a functioning gauge I believe. When I test my old sender transducer I get no continuity between the case and the lead to the gauge. Testing the new unit I bought from England for the P5 it registers 22.4 ohms at rest with ignition off. I wonder if I was sent a transducer for a P5B V8 instead of the 3-litre? Does anyone have a good 3-litre unit they could measure the resting resistance of with the ignition off to tell me? Thanks.
|
|
|
Post by Phil Nottingham on Jul 17, 2023 21:27:05 GMT
As far as I am aware all the voltage regulators (nominal 10v) were interchangeable and the 3 Litre/P4-95/110 are the same as the P5B and many other British cars of the period 1960-1990. They do look different (slightly) They are primitive in the extreme but cheap reliable and durable
|
|