Mark got the new oil pressure switch and oil presure gauge today from Real Steel and went about fitting and installing to the engine. He used PTFE tape wrapped tight around the threads giving a really good tight seal on the joints. It then screws directly into the block and fitted the oil pipe connection on the top that will eventually run up behind the dashboard to the oil pressure gauge. The wire for the switch will connect into the end thread and also up to the dash. We’ll wire up the oil pressure light later. 6 pics show his steps.


This is and extra bit I’ve written, following on from Aaron’s comment about checking that the sender has a good electrical earth.

As he pointed out, the body of the switch has to earth to the engine and when there is no oil pressure the contact in the oil pressure switch should be closed and therefore there should be 0(zero) OHMS (or close to Zero OHMS) resistance between the centre switch contact and the engine. When there is oil pressure (i.e when the engine is running), the contact is then broken in the switch and would then turn the light out. So if the PTFE tape was stopping the connection between the body of the switch and engine then the oil light would never come on.

There is a simple way to check there is a good connection. Simply using a multi-meter and switching it to OHM’s resistance, then without the engine running put one lead on the end connection of the switch and the other lead on the engine (as on pic below). You should see round 0(zero) OHMs. If the resistance is too high then you may need to remove some of the PTFE tape so that you get a good seal but also a good connection.


Thanks to Aaron for contacting us and pointing this out

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