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Old 06-03-2016, 06:22 PM   #1
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Oil leak

What is this strange object leaking oil under my rig (see pic)? Is it an oil sending unit?

Any and all input appreciated.

I have a 2002 Safari Sahara with an Cummins ISC turbo diesel.

Thanks,

Chuck
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Old 06-03-2016, 07:46 PM   #2
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Need a better picture showing the whole assembly on the left side. The small round cylinder looks like a pressure sensor but that's not what is leaking oil.

Exactly where is the leak located on the coach??
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Old 06-03-2016, 08:17 PM   #3
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It seems that I'm looking at 2 senders screwed into a tee.

If I'm looking from the ground up, a hose is going up to a oil port on the block.

If this is a picture looking up, check above the left sensor to see if oil is leaking above. If not, it is your problem.
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Old 06-03-2016, 08:48 PM   #4
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Is it on the passenger side by the starter? Could be the lift pump from above.

Bill
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Old 06-03-2016, 11:11 PM   #5
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Oil

It's on the drivers side. This is a picture looking up. The two units look identical and have small wires attached. Oil drips out of one when the engine is running.
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Old 06-03-2016, 11:21 PM   #6
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Those are oil pressure sending units , BUT not OEM Cummins . Coach manufacturer must have added them.
And why 2 remote.
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Old 06-04-2016, 09:56 AM   #7
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Quote:
Originally Posted by Skip426 View Post
Those are oil pressure sending units , BUT not OEM Cummins . Coach manufacturer must have added them.
And why 2 remote.
On my ISL I have three sending units in one area. I know one is a oil pressure sending unit for the ECM. One is for the dash gauge. I'm not sure about the third one, it might be a dash warning light.

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Old 06-04-2016, 10:13 AM   #8
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Two is common...One for engine management and one "to look at"

Scrub them with a rag to see if any part numbers and clean the wires.

Scratch wire color on each before moving further.

If no numbers check with voltmeter with engine off then at idle....probe in while connected.

If gage sender voltage will vary and if light sender it will toggle.

Most are standard but check with engine manufacturer to be sure.

Engine serial number helps.

And get it fixed...

We once had a Saturn that had difficulty passing smog....After many tries we found it had 2 temp senders....One for management and one for gage with both going to computer.

Mange meet one was bad and engine was running cold so the computer thought so would not pass...

Oil pressure sender fails it may shut down engine on the freeway.
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