What's this port for? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-14-2006, 11:07 PM   #1
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Default What'* this port for?



92 SSEi

That'* the LIM, driver'* side, facing in toward the throttle body. Me thinks it'* a coolant temperature sensor. But, I already see one directly under the throttle body in the LIM. I carlessly misplaced whatever was in that port during my disassembly process. If it'* just a temp sensor I can get a new one from AutoZone. Does this car have two?

I guess this is what I get for not keeping parts organized as I work.
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Old 03-14-2006, 11:11 PM   #2
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not on my series 2....

i see no reason for 2 temp sensors on the same piece
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Old 03-14-2006, 11:12 PM   #3
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I agree. This one has me stumped. Unfortunately the Chilton'* isn't of much help.

BTW, it'* the threaded port, just to the right of the LIM bolt.
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Old 03-14-2006, 11:13 PM   #4
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so there is this one on top rear, and the coolant temp sensor on the bottom front

does it look stock?
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Old 03-14-2006, 11:15 PM   #5
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There should be a coolant temp sensor in there.
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Old 03-14-2006, 11:19 PM   #6
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Here'* a pic looking directly down at the LIM.



The other sensor is directly under where the TB would be. The port I'm talking about is to the right and above. It screws in at a 45 degree angle.
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Old 03-14-2006, 11:19 PM   #7
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Sorry, my camera sucks and so does the lighting in the garage. That engine really isn't that dirty.
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Old 03-14-2006, 11:21 PM   #8
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Quote:
Originally Posted by J Wikoff
There should be a coolant temp sensor in there.
Yes, most of the Vin C, L and 1'* through 93 use 2 sensors... 94 might have changed but I am not 100% on that... I am sure of my 95 having only 1 tho... Both of the 91'* have 2... One for the gage and the other for the PCM

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Old 03-14-2006, 11:24 PM   #9
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Correct. One for the gauge, one for the PCM. Both of my L67'* have two.

Call it a backup. If the PCM unit fails, you still have a visual backup. If the Visual fails, the PCM will keep you safe. At this point, I'd replace them both with the same manufacturer.
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Old 03-14-2006, 11:25 PM   #10
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No problem. Will replace both. Brings me to my next question...are they both the same size and/or part number?
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