Temp Too Low???
Ok, this is an early 70's small block 318 intake and the red lines show the possible locations for a temp sender.
Senders can vary in size also, so first you want to locate a threaded opening that fits your sender unit and is as close to the thermostat as possible.
On The Wifes 72 Dart I had to drill and tap an existing 1/4NPT hole to 3/8 NPT so I could use the larger mechanical temp sender in the OE electric sender hole, because the electric sender for the idiot light was smaller.
Sure, I could have gotten adapters to eventually put the 3/8 sender on the 1/4 inch port, but it would have been so far away from the coolant flow it would be worthless.
Basically any one of the ports in this picture with the red lines could be used.
Remember, the closer to the thermostat the better and you don't want adapters if there is any possible way to avoid it.
On most manifolds, anything forward of the first high spot on the intake (runners) is going to be coolant and any holes on the back are going to be vacuum ports.
Some intakes, like the one on the Wife's car I had no choice but to drill it and tap to a bigger size because there was only the one small port available.
Ok, this is an early 70's small block 318 intake and the red lines show the possible locations for a temp sender.
Senders can vary in size also, so first you want to locate a threaded opening that fits your sender unit and is as close to the thermostat as possible.
On The Wifes 72 Dart I had to drill and tap an existing 1/4NPT hole to 3/8 NPT so I could use the larger mechanical temp sender in the OE electric sender hole, because the electric sender for the idiot light was smaller.
Sure, I could have gotten adapters to eventually put the 3/8 sender on the 1/4 inch port, but it would have been so far away from the coolant flow it would be worthless.
Basically any one of the ports in this picture with the red lines could be used.
Remember, the closer to the thermostat the better and you don't want adapters if there is any possible way to avoid it.
On most manifolds, anything forward of the first high spot on the intake (runners) is going to be coolant and any holes on the back are going to be vacuum ports.
Some intakes, like the one on the Wife's car I had no choice but to drill it and tap to a bigger size because there was only the one small port available.
