Converting Oil Temp gauge to Oil Pressure Gauge? Options

[9144me2enjoy]

1973 Porsche 914 2.0L. I’m removing my Oil Temp Gauge and installing a Oil Pressure Gauge. I installed a 100 psi VDO Oil Pressure Gauge. Do to the size of the new Sender Unit that fits a 100 psi VDO Gauge you cannot just insert it in the same location in the Taco Plate! I was able to drill a 7/16 hole in the same plate and install the new sender unit. I left the original sender unit where it was at and just removed the plug and placed it on the new 100 psi Oil Pressure Sending Unit. On the other end I just plugged the original harness back in the same 3 prong plug in on the back off the new VDO Oil pressure gauge. Sending unit wire to G and the + to fuse box etc. No reading on gauge! What’s wrong. The new sending unit is extended about 1/2” inside. Any suggestions. Thanks

[falcor75]

I had a piece like this machined to elevate my pressure sender from the stock idiot light location. The sender has two outputs, one for the gauge and one for the idiot light.



Mounted it looks like this.

[Dave_Darling]

I had a piece like this machined to elevate my pressure sender from the stock idiot light location. The sender has two outputs, one for the gauge and one for the idiot light.

Not a good idea. Now you have the weight of the sender and extension pipe all working on the little pipe threads in the case. The pipe acts as a lever arm, even though a short one, and the vibration can eventually damage the threads or the hole in the case.

The flexible hose is a better idea, though you do have to make sure to ground the outside of the sender.

--DD

[bdstone914]

I had a piece like this machined to elevate my pressure sender from the stock idiot light location. The sender has two outputs, one for the gauge and one for the idiot light.

Not a good idea. Now you have the weight of the sender and extension pipe all working on the little pipe threads in the case. The pipe acts as a lever arm, even though a short one, and the vibration can eventually damage the threads or the hole in the case.

The flexible hose is a better idea, though you do have to make sure to ground the outside of the sender.

--DD

(IMG:style_emoticons/default/agree.gif) That is dangerous. It will break and send a oil spout out of the top possible causing a fie when it hits the exhaust pipes/ Use a rear brake line from a 928 Porsche. 92835508002, $20 at 'Reilly.

https://www.oreillyauto.com/shop/b/brake-sy...982/porsche/928