Re: Front radiator and fan shroud.
Posted: Sun Jan 06, 2019 10:47 pm
Richard,
Sealant on the threads could cause the sending unit to send a signal that's not accurate. Some sending units (one wire of course) use the threaded section to ground the unit. The temperature reading (IIRC) is a result of resistance.
One of the issues with my engine is that I use two temperature senders. The water pump / fan is controlled from a switch in the left front cylinder head. I moved the temperature gauge sender to the right rear cylinder head. There is about 10 degrees difference in readings so it was a little eye opening when I first saw it. I've since learned that the difference is common and isn't a problem.
My water pump controller has a digital display that indicates when the pump is running. I can also sort of track it by watching the temperature gauge cause the temp will drop immediately.
I'm currently in the process of switching from carburated to a Terminator EFI from Holly. Their ECU is supposed to tie into a temperature sensor and now I'm not sure where to put it. I think I'll try to tie in into an existing switch. May or may not be possible or advisable. Guess I'll find out.
Sealant on the threads could cause the sending unit to send a signal that's not accurate. Some sending units (one wire of course) use the threaded section to ground the unit. The temperature reading (IIRC) is a result of resistance.
One of the issues with my engine is that I use two temperature senders. The water pump / fan is controlled from a switch in the left front cylinder head. I moved the temperature gauge sender to the right rear cylinder head. There is about 10 degrees difference in readings so it was a little eye opening when I first saw it. I've since learned that the difference is common and isn't a problem.
My water pump controller has a digital display that indicates when the pump is running. I can also sort of track it by watching the temperature gauge cause the temp will drop immediately.
I'm currently in the process of switching from carburated to a Terminator EFI from Holly. Their ECU is supposed to tie into a temperature sensor and now I'm not sure where to put it. I think I'll try to tie in into an existing switch. May or may not be possible or advisable. Guess I'll find out.