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Old 02-11-2019, 02:11 AM   #1
72Blazerod
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1987 Oil pressure gauge acting strangely

When I start the truck up the oil pressure gauge seems to work fine, but as it warms up the gauge starts dropping, eventually going all the way to zero. The truck seems to run fine and the temperature gauge didn't rise at all (as I would have expected if I had zero oil pressure). I'd like to hook up a mechanical oil pressure gauge to the engine to check the pressure, is that possible on a 1987? Any ideas as to what's going on?

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Old 02-11-2019, 09:43 AM   #2
Palf70Step
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Re: 1987 Oil pressure gauge acting strangely

Sounds like the sending unit is fubar.
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Old 02-11-2019, 10:57 AM   #3
Redneck Rydes
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Re: 1987 Oil pressure gauge acting strangely

When I start my 85 my oil pressure gauge pegs all the way to the right, amd stays there till i shut the engine off, any ideas?.
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Old 02-11-2019, 11:14 AM   #4
Palf70Step
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Re: 1987 Oil pressure gauge acting strangely

Quote:
Originally Posted by Redneck Rydes View Post
When I start my 85 my oil pressure gauge pegs all the way to the right, amd stays there till i shut the engine off, any ideas?.
My guess is same thing, sending unit is bad or wrong.
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