LT1-LT4 Modifications 1993-97 Gen II Small Block V8

coolant temp sensor

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Old 04-22-2007, 11:12 PM
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Default coolant temp sensor

is there a difference between the two sensors? i know there is one in the block...and one in the water pump. and i have replaced the one in the water pump before..but never touched or looked for the one in the block. its supposed to be on the drivers side...right? is there a difference between these two sensors? im on napa tryin to order the sensor for the block and it shows me 5 sensors...all of which look the same!! lol so i was just wondering if there is a difference. thanks guys
Old 04-22-2007, 11:14 PM
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The one on the drivers side Head is for the Gauge, it's got a really wierd pigtail. The one on the Water Pump is for the PCM, and that is for the Fans.
Old 04-23-2007, 07:32 AM
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so they do look different?
Old 04-23-2007, 08:01 AM
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Both look identical, but the Plug is different.
Old 04-23-2007, 01:06 PM
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The one on the head only has 1 pin... The one on the pump has 2
Old 04-23-2007, 01:19 PM
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So what if, when open loop kicks in, my fans are always on, but my gauge doesn't work :\ I replaced the pump one, still does it. I do think my TStat is stuck closed, since the coolant that leaked out from the sensor was greenish and in my radiator is brown, yuck brown, as in I"M GETTING A COOLANT SYSTEM FLUSH!

So yea, could it be that IF my TStat is stuck closed, my ****** running warm enough to kick the fans on, even if it's not circulating? (Which I've not blown anything, and it runs good) I'm confused :\ We'll see after the flush.



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