Oil pressure gauge - 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 05-10-2010, 07:37 PM   #1
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93 SSEi - 188500 km. Have noticed temperature gauge fluctuates 90 to 95 even when not running vehicle hard. Only used to see above 90 when running hard in warm summer weather. Also Oil pressure gauge - needle fluctuates below 275 - approx 140 sometimes at idle - yet holds 275 usually at idle and more when operating. No evidence of engine malfunction - noise overheating etc.
Water pump replaced 6000 km ( 3600 miles) back. Did not notice gauge fluctuation before or after that for a number of months.
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Old 05-10-2010, 07:44 PM   #2
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Maybe time for a new T-stat. Let us know and good luck
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Old 05-10-2010, 07:48 PM   #3
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Just had new one installed for starters this AM. All I see is running temp at about 100 and varies by 5 to 10 degrees.
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Old 05-10-2010, 07:58 PM   #4
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Do any other gauges move? Check the ground stud on the rear of the engine. I believe that'* where it is on your year. That ground is for the sensors.
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Old 05-11-2010, 01:48 PM   #5
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Thanks Dan
Only the temp and oil gauges move unusually - and have not had real chance to see re temp gauge since changing it yesterday.
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