Disco 2 engine oil leak from right side of engine

berg450 · Mar 14, 2018

Hello
I have an oil leak coming somewhere behind the alternator. I have already cleaned the engine trying to identify where it comes from. The front camshaft oil seal has already changed.
I run the car without the fan (to avoid blowing the oil away) for about 5-10min. No leak could be seen. I drove the car for about 200kms and again some oil under the alternator.
No any sign of oil from the top of the engine, only can be seen behind the alternator and on the side of the block. I have tried to take a picture, see attached.
Any idea would be appreciated.

Hellastony · Mar 14, 2018

Difficult to see from the pics, but if nothing from the top of the engine like from the camshaft cover, then the only place is either the oil feed or return to/from the vacuum pump on the front of the alternator, or oil that is already inside the loom from the injector loom and is exiting from the loom in that location. The latter is not unusual as that is the lowest point of the loom. What is the state of your red plug to the ECU?

Tony

brian47 · Mar 15, 2018

I'd go with Tony's idea that it could be the oil feed to the vacuum pump on the alternator. Check the "O" ring on the inlet pipe as the first inspection.

This diagram is part of the explanation of how to remove the alternator, but it does give you some idea of where things are.

berg450 · Mar 15, 2018

Thanks for the ideas. The first thing i have also checked is the oil feed. The pipe and the connections are dry. What i could not see is the drain hose.
Regarding on injector harrness, i changed it about 4 months ago, but i will check the ecu plug just to make sure.

joojar · Mar 15, 2018

I had similar, turned out it was oily gunk leaking from inlet manifold which was loose on the head. Most of the studs/screws were loose in fact. Seems "they do that"

berg450 · Mar 16, 2018

joojar said:
I had similar, turned out it was oily gunk leaking from inlet manifold which was loose on the head. Most of the studs/screws were loose in fact. Seems "they do that"

This what i suspect as well. I already bought a new gasket for the manifold so will change in the coming days.

berg450 · Mar 18, 2018

Today i could work a bit on my car and checked the injector harness, no oil in red plug. So i have removed the inlet manifold and found oil leak under the first two inlets. Also found that the screws were not really tight (could be removed almost by hand). I cleaned the manifold and will be reassambled with new gasket. Hopefully the leak will be solved.

brian47 · Mar 18, 2018

If you're saying that there is oil actually in the inlet manifold then that would require some more investigation to find out where it's coming from. Could be a signal that things are starting to go amiss with the turbo. If the oil is coming from below the manifold, on the head then you still need to work out where it's coming from.

berg450 · Mar 18, 2018

There is surely some oil in the manifold (also found in the outlet of intercooler, and in the rubber hose) but according to the previous owner the turbo has already changed

berg450 · Mar 19, 2018

I have just checked the turbo and mechanicaly seems to be ok. No any play can be felt on the shaft. I have removed the inlet side hose and oil could be seen there which comes from the breather hose i guess. Is it normal or something has to be checked there as well?

Disco 2 engine oil leak from right side of engine

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