Oil pressure gauge hose location - warning, largish pics

[TimJM]

I decided to tackle another job - finding the oil pressure hose to check for any signs of kinking/damage before I remove the dash pod and gauge to send for repair.

I've had a quick look down the back of the engine and it looks very busy down there, more so than I remember form my last one. I had presumed it would be easily visible as the hose itself isn't very long and it must be connected to the gauge on one end. I hoped to see it travelling through the bulkhead into the car but no luck - can anyone see it in these pics?

[pmessling]

The hose goes under the coil packs. Next to the oil pressure switch. It then goes to a bulkhead fitting in the flat near the clutch res cover.

[TimJM]

Do you mean this one - the dirty great obvious one in plain sight? If so, how does it then connect to the gauge? I thought the gauge was mechanical with a direct connection, it must be over a foot from there to the gauge. Will unbolting that connection and attaching a test gauge work in the sense an accurate reading will be possible?

[pmessling]

That's the one. It is a mechanical gauge but uses oil in the line to move the needle.

Yes. Connect a gauge there and you'll get a reading.

[TimJM]

I just need to find out the thread now for the hose. I am guessing TVR would have used BSP not UNF.

That connection isn't very big so my initial guess is 1/4 BSP, does anyone know if this is correct?

[pmessling]

I went through all the measuring last year when I blanked it off. But can't remember the size. But 1/4 is a good start.