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Old 03-28-2008, 02:56 PM
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Oil pressure at 3 on 1993 300E. Is the normal?

Just bought a 93 300E and wondering what the normal oil pressure should be?


Last edited by Kyle300E; 03-28-2008 at 03:02 PM.
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Old 03-28-2008, 03:26 PM
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I was reading about a oil pressure sender. what is the use, and what happends if i don't replace it?
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Old 03-28-2008, 03:32 PM
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3 Bar is about right

For a cold engine, It can drop to 1.5 with a hot engine.

As I recall a Bar is equal to 14.8 PSI so 3 x 14.8 = 44.5 PSI which is about where it should be.

Looks like your sender is doint it's job OK.

BTW What engine? 2.8 or 3.2? (It helps with questions).
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Old 03-28-2008, 03:43 PM
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it is a 2.8
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Old 03-28-2008, 03:48 PM
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Quote:
Originally Posted by Kyle300E View Post
I was reading about a oil pressure sender. what is the use, and what happends if i don't replace it?
The sending unit is bolted to the block and electrically transmits the oil pressure information to the pressure gauge on your cluster. If you turn the key w/o starting the engine and the gauge pegs to "3", your sending unit is bad. If your engine is running and the gauge reads "0", it could also be bad, or you have a serious engine problem!

Note that oil viscosity can affect your readings...but on average, readings of 1.5 and above at idle is normal. But it should peg to "3" when maintaining engine speeds above idle.
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Old 03-28-2008, 03:53 PM
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i just whent out there and turning the key to the on possion and it does go to 3. so the sending unit is the problem?
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Old 03-28-2008, 04:01 PM
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i just whent out there and turning the key to the on possion and it does go to 3. so the sending unit is the problem?
Yes.

But since yours is a 2.8 (M103 motor) and I have a 3.2 (M104), I can't tell you accurately how to go about replacing it or its exact location. I know the part goes for around $70. I can replace it on mine (did it twice) with 15 minutes of spare time and a crescent wrench...and I'm not a wrench-head!
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Old 03-28-2008, 04:04 PM
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thanks

thanks for the help!

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