Oil Pressure sender 3,8

adam · Post by **adam** » Wed Jan 21, 2026 4:52 pm

Hi has anyone tried the oil pressure sender from Classic Jaguar. They claim it is made to OE spec £144 but is it just a generic one selling for more money.

Thanks Adam

3

Post by **Heuer** » Thu Jan 22, 2026 12:15 pm

Don't waste your money, install a mechanical oil pressure gauge for much better accuracy. Details in the 'Upgrades' part of the Forum.

flatfloor 3.8 · Post by **flatfloor 3.8** » Thu Jan 22, 2026 2:08 pm

As above, fit a wet gauge and be done with it. All the senders are unreliable.

adam · Post by **adam** » Thu Jan 22, 2026 4:33 pm

Thanks I will look into that,

Adam

lowact · Post by **lowact** » Thu Jan 22, 2026 10:31 pm

It's not original. Position of the terminal is the giveaway Original had the terminal in the centre, this one has it on the side. The difference is dictated by the internals. The original with centre terminal was a Smiths bi-metalic type that was passably accurate when paired with our bi-metallic gauges; NLA. The senders with the side terminals are resistive type, substituted by Caerbont, that do not work well with original Smiths gauges, not accurate or reliable.

adam · Post by **adam** » Fri Jan 23, 2026 4:55 pm

I have now ordered wet gauge, with nylon pipe as recommended in thread thanks for your help.

Thanks Adam

adam · Post by **adam** » Mon Feb 02, 2026 6:32 pm

Hi I lowered gauge panel, I found voltage regulator is connected to oil pressure gauge is this correct for a 63 car

Adam

Gfhug · Post by **Gfhug** » Mon Feb 02, 2026 8:17 pm

Adam, have you looked at the wiring diagram? You’ll see the voltage regulator is connected to the oil pressure gauge. Maybe you’re misinterpreting what you are seeing. Check which terminals that wire is going to and maybe it is on the correct one

Geoff

adam · Post by **adam** » Mon Feb 02, 2026 8:38 pm

Sorry I read a post that said its not connected to voltage regulator

Adam

adam · Post by **adam** » Mon Feb 02, 2026 8:45 pm

Post I read said it is only used for temp and fuel gauge ,

Adam

Tommd · Post by **Tommd** » Mon Feb 02, 2026 8:55 pm

To be clear, the oil pressure gauge, as original, operates from battery voltage. It receives this battery voltage off the INPUT terminal on the dash voltage regulator, not from the regulated voltage of the dash voltage regulator.
Tom

DWW · Post by **DWW** » Mon Feb 02, 2026 9:59 pm

That is correct.

adam · Post by **adam** » Tue Feb 03, 2026 7:51 am

Thank you for helping me out.I should have looked at the manual

Adam

40GT · Post by **40GT** » Tue Feb 03, 2026 9:00 am

If you are fitting as you mention above, a mechanical oil pressure gauge, then the only electrical connection would be for an illumination bulb.

adam · Post by **adam** » Tue Feb 03, 2026 2:57 pm

Thanks again for every ones input such a great place to get advice.

Adam

adam · Post by **adam** » Sun Mar 15, 2026 9:36 am

Hi I have fitted a wet gauge getting great oil pressure reading so thanks again for the advice.

Adam

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Oil Pressure sender 3,8

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