I have an 85 iroc with the tpi. Been having problems with the temperature gauge not always working so I bought a mechical gauge but idk where to connect it at. Am I supposed to take out the collant temp sensor or something? Please help.

 

Each cylinder head will have a port on the sides, just above the line of the spark plugs. One side will have a temp sensor already there, the other side should just have a plug in it. Unscrew the plug and screw your new sensor in. The plug on my heads took the square end of a ratchet. It was EXTREMELY tight after all these years, so work carefully to avoid stripping the threads. And use some Teflon pipe tape to seal the threads on the new sensor.

 

I looked for what you mentioned and I cannot seem to find it. What motor do you have maybe the layout is different. Do you have any idea If I could drill and tap a hole into the thermostat housing to fit it?

 

gonna have to remove the temperature sending unit on driverside head between #1-3 cylinder.https://www.thirdgen.org/forums/cool...re-sensor.html . post #18

 

I have a fairly stock 350, a 70's block with 80's 305 heads. Each head has a plug in the water jacket. One head is still plugged. The other has my fan switch installed. I do not have the original temp sensor installed for the ECM since I am running a Holley carb and no ECM. There is another port in the coolant passage on my intake manifold, and I have the probe for my mechanical temp gauge installed there.

 

I changed the coolant temp sensor about 2 weeks ago because I thought that would fix the gauge so what your saying is I can remove it and plug the mechanical gauge directly into that, spot?