Hooking up after engine replacement 300SE

[RossCormack]

Hi Guys,
I would much appreciate it if someone can identify two connections that I seem to have forgotten during my job replacing the engine in my 300SE. One is a vacuum tube from the top of the engine

I can't remember where this goes and I didn't label it.

The other is a cable shown here. Does anyone know what this is?

I've done the hard part and now I've these loose ends to tie up. Hope someone can help!

Ross

 

[RossCormack]

Anyone?

 

[grober]

That's the vacuum tube from the thermo vacuum valve that leads to the evaporative canister under the nearside wing - there should be a connection on the nearside inner wing just behind the headlight unit. [ the other pipe should lead to the inlet manifold somewhere]. Not sure about the other one---might be the oil pressure sender connection --are all the instruments indications working?

 

[RossCormack]

Thanks! I think I already plugged in the oil pressure sensor (near the filter). It is black plastic, whereas this one is a rubbery feel and a sort of peach colour. Tomorrow, I will look for a part number on the thing, maybe I could Google it and find out more.

For the vacuum tube, I had labelled another tube going to the location you describe. A mechanic came by today and thought this one goes to the valve near the ABS block (?) He thinks the way it was setup was slightly different between the two engines, thus the confusion (ie, one engine had two tubes joined together to reach the distance).

I still have to put in coolant, oil, and the crankshaft position sensor so have not dared to switch anything on yet. I don't expect the new engine to start and to work perfectly right away - but I do hope it does

 

[RossCormack]

I found it! It was the oil level sensor at the sump

 

[grober]

Your mechanic was correct the early cars used a vacuum temperature switch to open the vacuum line from the manifold to the evaporative canister. Later cars used an electrical solenoid valve[ often labelled MOT??] controlled by the engine ECU -- hence the difference. Glad you found your mystery connection, although the engine would have run without it I guess.