Re: Temp sending Unit

Posted by Mike On 2011/1/24 20:08:54

With key on and old sender hooked up, gauge is at H rest, then gauge gets power (actually, it always has power, thanks to previous person's wiring, had to play with that.) it goes right down to C. Hook up other sender, goes right to H. Didn't even put it in the water, no need to see it won't work.

I did come across another solution that may work, but not look the best and read a bit low.

If i install an elbow in the sender port pointing horizontally along the block, then an adapter up to the thread size of the early sender, then about 2-3 inches of pipe, then finally the sender and a male to mail pipe adapter, it should read decently. I would think though, that with the probe out of the current "flow", that the coolant in the "sample tube" I've created might cool slightly and not move out of that area, creating a cooler "pocket", and the air around the engine might cool the pipe down slightly.

I could use an adapter, then pipe, then male to male adapter and the sender, but then it'd stick out a mile into the engine bay. Might be a more accurate reading though.

I REALLY don't want to drill and tap it with the motor in, there's not a straight shot at the hole. This might be the best and cheapest compromise.

Thank everyone for the info, links, and brain power! One more thing to consider when swapping a newer motor into an older chassis. (Also, had to drill and tap throttle crosshaft holes, the newer head did not have them in that spot.)