The Mitsubishi Pajero Owners Club®

2.25diesel

Has anyone else had problems with oil leaking from the turbo oil feed line connector on the 4D56 engine?

I am referring to the hexagon adaptor shown in the diagram below (part number 01214P).

I have an oil leak down the right hand side of the engine for a while that I had been unable to find.

Looking with a mirror I fairly sure that the drip is coming from where that adaptor screws into the cylinder head. It soon reappears in the same place if wiped away. I replaced rocker cover gasket and rear half-moon seal back in 2018. So far the rear half-moon seems to have stayed dry.

I originally thought that oil was leaking through the turbo seals as oil was dripping down the exhaust, so am relieved that it doesn't seem that is the problem.

I have found out that it is effectively impossible to get a regular 17mm spanner onto that adaptor with where it is located.

To save having to buy a flare nut spanner, I will most likely cut a piece out of a 17mm offset ring spanner.

Has anyone else had this problem? Do these fittings gradually vibrate loose with combined with the heat expansion of the engine? I have also recently tightened both the oil pressure sensor and vacuum pump oil feed banjo bolt as these seemed to have slightly loosened.

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2.25diesel · Posted: Tue Sep 15, 2020 19:56 Post subject:

I tried the ring spanner with the cutout. Unfortunately the inlet manifold still doesn't allow enough room to turn the spanner.

I did wonder if I could temporarily remove the steel turbo oil feed pipe and use a socket and extension bar on the fitting. However it is also difficult to get to the banjo bolt at the turbo end.

I am always reluctant to undo any connections that aren't leaking to avoid stripped threads or causing other leaks.

Why does something that should be a simple job have to be so difficult?

polmacd · Posted: Sun Jan 09, 2022 20:56 Post subject:

Hi, I know this is a old post but maybe anyone will know, I was wondering if this is a common issue, my turbo just went and after removing the intake manifold I also have seen loads of oil around this connector, MD170837 . I was going to remove it and apply some liquid seal on it ( maybe PTFE tape ) . Or maybe the leak is from the rear rocker cover half moon.......

polmacd · Posted: Sun Jan 09, 2022 21:35 Post subject:

Hi, I know this is a old post but maybe anyone will know, I was wondering if this is a common issue, my turbo just went and after removing the intake manifold I also have seen loads of oil around this connector, MD170837 . I was going to remove it and apply some liquid seal on it ( maybe PTFE tape ) . Or maybe the leak is from the rear rocker cover half moon.......

laurief · Posted: Sat Jan 15, 2022 1:26 Post subject:

2.25diesel · Posted: Fri Jan 21, 2022 21:31 Post subject:

I sold the vehicle a few months after my original post without ever getting round to sorting it.

I know it wasn't the half moon as I had replaced that seal back in 2018.

Shining a light onto the back of the engine from underneath the vehicle showed that the rear of the engine was still clean when I first noticed the leak.

Putting some sealant on the connector threads while the intake manifold is off seems like a good idea. Be careful re-tightening the connector, as threads in aluminium can strip easily.