W124 Oil Pressure Sensor / sender Testing

[tjamesbo]

I am Going to test the Oil sender on the 124 ( 220 petrol )
I think I have found it Is this it ?? and how do I unplug the connector Pull ??? ( dont want to break it ) I want to test the resistance to check the sender and sub a resistor to check the guage ) Thanks Boyd

 

[coupe deville]

That looks like the cam position sensor

This is the oil pressure sender

Installed new oil pressure sender - Benzworld.org - Mercedes-Benz Discussion Forum

Google is your friend

You watch The X Factor while I search the web for ya

 

[tjamesbo]

thanks but I am having trouble viewing the piccies in benzworld I am a member but not posted since joining in 2009 so I think my accounts been restricted I'm trying to sort it at the Moment Once sorted hopefully all will be clear

 

[carat 3.6]

I think the oil pressure switch is on the drivers side of the engine, just above the engine mounting bracket.

 

[tjamesbo]

OK got it now on drivers side underneath exhaust manifold and above engine mounting I am struggling now with the removal of the connector ....pull it off ??? dont really want to break it

 

[tjamesbo]

I have tested the guage with some resistors and the guage looks good
10 ohm gives 0 Bar
68 ohms gives 1.5 bar ( should be about 1 )
180 ohm gives 3 bar
Guage stays rock steady even when revving so no voltage fluctuation apparent
The Loom is in good condition also no degradation there
So its the sender to be replaced
A 17mm Crows foot extension on a socket bar is whats required to undo and give access to the nut on the back . New one from euromerc at £35 in now and she is like new 3 bar all the way even after an italian tune up only drops to about 2.5 Bar at Idle in Drive
Now onto the play in the steering and the rattley Cat