So I finally got my rebuilt 235 up and going. I'm having some issues with the temp gauge and I'm hope you can help. I have tried two temp senders in the engine, one reads like the engine is over heating ( jacked all the way to "H"), the other sender is reading like the engine is running cold ( staying on "C" ). The one that's showing HOT is one I bought from Checker, they sold it to me as one being from a '62 C10 235. The sender that's running cold is one from a box of parts I received when I bought the engine. Both look the same but are acting completely different from each other. I know the gauge is working, because when I ground the green lead, it goes over to H on the gauge. Is it as simple as the one that reads Cold is just bad and the one that reads hot was just not the corect year/model for my engine. Is there a difference in temp senders from '59 to '62 Chevys?
My truck is a 1959 3100 with stock 235, enigine is a '59 to '62 block and the head is a 848
